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Using the Chinese Agriculture Technology Demonstration Center (ATDC) in Africa as a quasinatural experiment, we examine the causal impacts of China's aid on crop production in Africa. The data pertain to African country-by-crop panel data from 2000 to 2018. Leveraging the triple difference-in-differences method, we find that the ATDC leads to increased crop production and improved trade dependence. The positive effects are more pronounced for free-standing technical support and ATDCs operated by state-owned enterprises. Lastly, the ATDC has profound implications for local agriculture and rural development. [ABSTRACT FROM AUTHOR]

This paper analysed the effect of freshwater withdrawals and management on agricultural and industrial sectors productivity in the emerging market economies. The auto-regressive distributed lag model and the panel analyses were employed in our estimations. Our result revealed that Brazil had better water use efficiency in agricultural production with annual withdrawals which contribute significantly and positively to the increase in crop and livestock index. In contrast, annual withdrawals for agriculture were considered to be least efficient in Russia, followed by China and India, although, in South Africa, the result suggested an insignificant positive effect in the incremental index. Furthermore, our analysis revealed that freshwater withdrawals have a significant positive impact on industrial outputs in South Africa. Similarly, water withdrawals were positively related to industrial sector productivity in China and Russia. Brazil and India appear to be the least efficient countries where withdrawals impacted negatively (and significantly for Brazil) on industrial sector outputs. Our panel analyses showed that freshwater withdrawals were positively associated with crop and livestock production index and industrial outputs in the BRICS economies. However, the magnitude of the impacts was only significant for the industrial sector. Moreover, investments and private participation in water and sanitation projects impacted significantly and positively in productivity in both sectors. [ABSTRACT FROM AUTHOR]

Human capital development is considered the primary source of knowledge and skills in the innovation process. Despite this, there is evidence of a lack of technical and managerial knowledge among emerging sugarcane farmers who are beneficiaries of South Africa's land reform programme, thus, limiting their full potential in terms of innovation and productivity which is detrimental to their competitiveness. This paper employs the Crépon, Duguet, and Mairesse (CDM) approach, correcting for endogeneity problems, to estimate the causal impact of on-the-job training expenditure, used as a proxy for human capital development, on innovation, and innovation on farm productivity. It is based on a case study of 35 emerging sugarcane farmers in the KwaZulu-Natal north coast, South Africa. The results from the CDM model confirm the causal relationships between human capital (on-the-job training) and the innovation behaviour of the farmers, which positively impact the farm's productivity. This result underscores the relevance of human capital development in boosting innovation and productivity in the agricultural sector. [ABSTRACT FROM AUTHOR]

Accurate crop mapping is of great significance for crop yield forecasting, agricultural productivity development and agricultural management. Thanks to its all-time and all-weather capability, integrating multi-temporal synthetic aperture radar (SAR) for crop mapping has become essential and challenging task in remote sensing. In recent years, deep learning (DL) has demonstrated excellent crop mapping accuracy to interpret crop dynamics. However, existing DL-based methods tend to be incapable of capturing spatial and temporal features at different scales simultaneously, and this often leads to severe mis-classification due to the complex and heterogeneous distribution of crops and diverse phenological patterns. In this paper, we propose a novel spatio-temporal multi-level attention method, named as STMA, for crop mapping using time-series SAR imagery in an end-to-end fashion to increase the capability of crop phenology retrieval. Specifically, the multi-level attention mechanism is designed to aggregate multi-scale spatio-temporal representations on crops via cascaded spatio-temporal self-attention (STSA) and multi-scale cross-attention (MCA) modalities. To ensure a fine extraction of multi-granularity features, a learnable spatial attention position encoding is proposed to adaptively generate the position priors to facilitate multi-level attention learning. Experimental results on Brandenburg Sentinel-1 dataset, public PASTIS-R dataset and South Africa dataset demonstrated that STMA can achieve state-of-the-art performance in crop mapping tasks, with the accuracy of 96.54% in the Brandenburg Sentinel-1 dataset, 86.77% in the PASTIS-R dataset and 83.37% in the South Africa dataset, validating its effectiveness and superiority. Further comparison of spatio-temporal generalization capability reflected its excellent performance in spatio-temporal modeling on different crops and scenarios. This research provides a viable and intelligent spatio-temporal framework for large-area crop mapping using time-series SAR imagery in complex agricultural systems. The Brandenburg Sentinel-1 dataset and the STMA code will be publicly available at https://github.com/hanzhu97702/ISPRS_STMA. [ABSTRACT FROM AUTHOR]

Climate change is one of the multiple challenges facing all categories of farmers globally. However, African farmers are the most sensitive in respect of climate variability and change. Climate change impacted negatively on crop production and the livelihoods of the local farmers. In black township South Africa, agricultural activities are highly dominated by small-scale farmers, whose farming system is highly vulnerable to changes in climate. This paper presents the analysis of how small-scale farmers employed adaptation strategies in response to climate change and determinants of small-scale households' choices of coping and adaptation approach to climate variability and change in Vhembe District, South Africa. Multi nominal logit model was used on a surveyed of 224 local farmers. Farmers' socio-economic attributes, was used in response to climate changes and further, households have adaptation strategies both on-farm and off-farm approach. Such approaches were; drought-tolerant seeds, shorter cycle crops, diversification of crops, changing planting dates, small-scale irrigation, migrating to urban areas and involvement in petty business. The results of the findings reveals that the significant drivers affecting choice of adaptation approach include climate information, gender, farm size, education level, farmer experience, decreasing rainfall and increases in temperature as farmers' determinant choices of adaptation to climate change. While, on the other hand, off-farm resources, headed households and age had no significant impact on the choice of coping and adaptation approach to climate change. Therefore, policy makers in the local municipality should play a significant role by enhancing adaptation strategies appropriate for particular climatic shock on the study area. [ABSTRACT FROM AUTHOR]

In this introductory paper we review historic and contemporary development of sugar cane production across the southern Africa. We argue that the region’s sugar industry provides a useful lens through which to understand current dynamics of corporate capital and agricultural production in Africa. We identify three distinct elements of political-economic analysis: first, the operation of logics of capital investment in different settings; second, the nature of state policies and politics in different national contexts; and third, local processes of production, accumulation and livelihoods, including effects on labour and social differentiation. The paper draws on the empirical cases from seven southern African countries presented in this collection. It highlights the rapid concentration of corporate control by three South African companies over the past decade, but also a diverse set of outcomes contingent on local context. This is particularly evident in the nature of ‘outgrower’ sugar cane production which is found in all cases but constituted in different places by quite different social categories in terms of wealth and scale of production. We argue that common stereotypes of corporate investment as either ‘win–win’ or as a ‘land grab’ rarely apply. Rather, the nature and outcomes of ‘outgrower’ systems needs to be understood as a manifestation of context-specific political-economic relationships between corporate capital, national governments and a variety of local holders of capital, land and labour. [ABSTRACT FROM PUBLISHER]

Purpose The purpose of this paper is to assess the efficiency of agricultural production in South Africa from 1970 to 2014, using an integrated two-stage fuzzy approach.Design/methodology/approach Fuzzy technique for order preference by similarity to ideal solution is used to assess the relative efficiency of agriculture in South Africa over the course of the years in the first stage. In the second stage, fuzzy regressions based on different rule-based systems are used to predict the impact of socio-economic and demographic variables on agricultural efficiency. They are compared with the bootstrapped truncated regressions with conditional α levels proposed in Wanke et al. (2016a).Findings The results show that the fuzzy efficiency estimates ranged from 0.40 to 0.68 implying inefficiency in South African agriculture. The results further reveal that research and development, land quality, health expenditure–population growth ratio have a significant, positive impact on efficiency levels, besides the GINI index. In terms of accuracy, fuzzy regressions outperformed the bootstrapped truncated regressions with conditional α levels proposed in Wanke et al. (2015).Practical implications Policies to increase social expenditure especially in terms of health and hence productivity should be prioritized. Also policies aimed at conserving the environment and hence the quality of land is needed.Originality/value The paper is original and has not been previously published elsewhere. [ABSTRACT FROM AUTHOR]

This theoretical paper seeks to make a significant contribution to the South African land reform discourses. The paper argues that the pace of land redistribution in South Africa is static, and therefore limits the livelihood choices of most intended beneficiaries of the land reform programme. The primacy of the programme within rural development ought to be measured and assessed through ways in which the land reform programmes conform to and improve the livelihoods, ambitions and goals of its intended beneficiaries without compromising agricultural production and the economy. Additionally, this paper highlights the slow pace of the land reform programme and its implications for the socio-economic transformation of South Africa. The paper concludes by demonstrating the need for a radical approach towards land reform which will not disrupt agricultural production, and further secure support and coordination of spheres of government. The democratic government in South Africa inherited a country which is characterised by extreme racial imbalances associated with social relations to land and overt spatial distortions. Non-white South Africans are spatially plagued with feeling the effects of colonial and apartheid legal enactments which sought to segregate ownership of resources on the basis of race. Consequently, the democratic government is mandated to formulate land reform measures to aid the reversal of colonially fuelled spatial distortions. Thus, coordination between the spheres of government, markets forces and civil society is indispensable in the accomplishment of satisfactory land reform. [ABSTRACT FROM AUTHOR]

This paper explores the prospects of commercial producers who would be willing to exit voluntarily in the near future to make land available in the market. In addition, it also considers what factors are restricting the acceleration of this rate of exit from a land-supply perspective with respect to barriers to exit. The prospect of structural change from such acceleration is also explored using three scenarios. An agent-based mathematical model is used to implement the three scenarios. This model is constructed from a dataset of 450 commercial producers across South Africa. The results suggest that a reasonable amount of arable land could be available for redistribution, with only modest structural change regarding animal production, despite drastic alterations in veld. These results provide some guidelines on how assistance for struggling producers can make land available for efficient producers, which could make the sector stronger. All potential exiting commercial producers have common reasons for doing so, which could be used to initiate a positively inclined, structured discussion on land supply. [ABSTRACT FROM AUTHOR]

Over the last 20 years sugar production in southern Africa has been characterised by both the geographic dispersal and the heightened concentration of (formerly) South African sugar capital. This paper argues that key variations in the contours of corporate accumulation in the region can be explained through dynamics generated by two sets of interacting variables: (i) the changing productivity of sugar manufacturing and sugar cane cultivation, and the interaction between them, and (ii) shifting terms of pricing and exchange, as governed by mercantile politics. An arithmetic model for the analysis of data is applied in the case of Illovo Sugar. It shows that high profits in Malawi are due to both favourable mercantile and productivity features; that Mozambican profits come exclusively from mercantilism; that Tanzania, Swaziland and especially Zambia owe their relative profitability to particularly high levels of productivity, and that South Africa, Illovo’s country of origin, receives low profits in both mercantile and productivity terms. These differences are rooted in value relations, which are core to understanding accumulation in sugar. The paper argues that, although the logic of sugar is somewhat unique, the approach to the analysis of accumulation adopted here has wider application. [ABSTRACT FROM PUBLISHER]

The substitutability of the economic institution of slave labour has often been assumed as a given. Apart from some capital investment to retrain slaves for a different task, essentially their labour could be substituted for any other form of labour. This paper questions that assumption by using a longitudinal study of the Graaff-Reinet district on the eastern frontier of South Africa's Cape Colony. We calculate the Hicksian elasticity of complementarity coefficients for each year of a 22-year combination of cross-sectional tax datasets (1805–1828) to test whether slave labour was substitutable for other forms of labour. We find that slave labour, indigenous labour and settler family labour were not substitutable over the period of the study. This lends credence to the finding that slave and family labour were two different inputs in agricultural production. Indigenous khoe labour and slave labour remain complements throughout the period of the study even when khoe labour becomes scarce after the frontier conflicts. We argue that the non-substitutability of slave labour was due to the settlers' need to acquire labourers with location-specific skills such as the indigenous khoe, and that slaves may have served a purpose other than as a source of unskilled labour, such as for artisan skills or for collateral. [ABSTRACT FROM AUTHOR]

Copyright of Irrigation & Drainage is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This contribution analyses the impacts of conversions of commercial – mainly white-owned – farms to wildlife-based production on access to land for farm workers and dwellers in South Africa. They depended on informal arrangements with landowners for access, hence the notions of 'abilities to access' and 'bundles of power' are more appropriate concepts to analyze their access than bundles of rights. In post-apartheid South Africa, the state attempted to formalize farm dwellers' land rights, but simultaneously deregulated the agricultural sector, which stimulated land concentration and land investments, and changed social relations on commercial farms. These contradictory interventions impact negatively on farm dwellers' abilities to access to land on commercial farms. The paper furthermore demonstrates that conversions to wildlife-based production constitute one response by landowners to the changes in the agricultural sector, but also play a role in struggles about identity and belonging in post-apartheid South Africa. [ABSTRACT FROM AUTHOR]

South African agrarian policy aims to integrate smallholder tree‐crop farmers into high‐end value chains with growth and employment potential, generally neglecting socio‐economic differentiation amongst them. This paper aims to analyse socio‐economic differentiation amongst tree‐crop farmers in Vhembe District, Limpopo, using a class‐based analysis based on livelihood diversification and accumulation. Cluster analysis of survey data and semi‐structured interviews reveals that most tree‐crop farmers engage in petty commodity production, internally differentiated by their combination of income sources and livelihood strategies. Farmers' ability to engage in accumulation and upward class mobility is generally severely constrained by limited access to capital. Agricultural diversification offers livelihood potential but limited possibility for accumulation, whereas salaried nonfarm work offers more promising prospects for accumulation but limited livelihood opportunities. A minority demonstrated characteristics of small‐scale capitalist farmers, internally differentiated by their reliance on salaried employment or agricultural production. The findings challenge the notion of an undifferentiated class of market‐oriented smallholders. [ABSTRACT FROM AUTHOR]

Copyright of Anthropology Southern Africa (2332-3256) is the property of Routledge and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Climate affects crop production decisions and outcomes in agriculture. From very short-term decisions about which crops to grow, when to plant or harvest a field, to longerterm decisions about farm investments, climate can positively or negatively affect agricultural systems. Although the general effects of climate change on agriculture are broadly understood, there are limited studies that model the relationship between specific crops and climate variables. The study uses the Autoregressive Distributed Lag (ARDL) model to analyze the sensitivity of maize yield to climate variables, fertilizer use and other non-climate variables. This paper uses annual timeseries data of 47 observations spanning from 1970 to 2016. The results reveal that rainfall and temperature are important maize yield drivers in South Africa. However, if excessive, they will produce negative effects. The findings of this analysis are relevant for designing long-term interventions to mitigate the effects of climate change on maize production. [ABSTRACT FROM AUTHOR]

This paper analyses the economic viability of slavery in the Cape Colony in southern Africa. It has been extensively documented that the affluence of elites was built on the importation of slaves. However, the Dutch East India Company or Verengide Oost- indische Companje, which administrated the colony, expressed concerns that free settlers had invested too much capital in the trade, so that some indications exist that profitability was not certain for all farmers. In this paper, hedonic slave price indices and the value of their marginal productivity have been estimated, to construct annual returns, which are in turn compared with returns on other investments for the period 1700-1725. Hedonic price functions were estimated to remove the anticipated lifetime returns that slaves would yield and to isolate buyers' perceived depreciation of the slave for 1 year. Cobb-Douglas production functions were estimated for average farmers, as well as at various quintiles along the distribution, to evaluate scale effects. Large farmers enjoyed high returns to slavery over most of the period, confirming the assertions that the elite used slaves profitably. Small farmers, however, did not recoup slave costs from agricultural production: this suggests either that they overinvested in slavery relative to other capital goods (e.g. ploughs or wagons), or that they used slaves profitably outside of agriculture. [ABSTRACT FROM AUTHOR]

Developing countries are balance‐of‐payments constrained. In this context, high‐value agricultural exports can make a greater contribution to structural change than development economists and developing country governments have typically acknowledged. This is thanks to dramatic recent changes in agricultural production, consumption and trade. These transformations are obscured by a simple classification system that has not adapted to changing patterns of global capitalist production. This article examines some recent efforts to rethink the basis of economic classification; it contributes to this emerging literature by proposing a way to think about the distinctions among economic activities that builds directly from the observation of production rather than a method of ex‐post mapping of trade data. A more accurate classification of economic activities would, the authors suggest, help policy officials design more coherent and growth‐enhancing industrial policies in support of accelerated structural change and productivity growth. The article draws on primary fieldwork in Ethiopia in particular, but also on fieldwork in South Africa and on secondary evidence. [ABSTRACT FROM AUTHOR]

This paper examines the determinants of participation in homestead food garden programmes and its impact on productivity and net returns of smallholder maize producers in the Gauteng province of South Africa. The paper further establishes the nexus between land ownership and outputs from homestead food garden programmes. The data was obtained from 500 maize-producing households. The findings demonstrate that participation in homestead food garden programmes could significantly enhance the welfare of rural households by increasing their yield and net returns. Participation in the programme increased maize yield and net returns by 43.37 per cent and 22.01 per cent respectively. Cultivating more than one hectare of farmland enhanced the outcome of participation in a homestead food garden programme more relative to cultivating less than one hectare. Homestead food garden programmes should be run in conjunction with land ownership. Our findings demonstrate the need for policymakers and evaluators of agricultural interventions to consider farmers’ decisions to participate, programme outcomes and land ownership in their assessments in order to avoid biased judgement. The willingness of people to participate in farming should be paramount to the homestead food garden programme and land ownership policy, otherwise the redistribution of farmland to people who are not willing to farm will be meaningless. [ABSTRACT FROM AUTHOR]

The phyllosphere hosts a considerable number of microorganisms, providing a vast habitat for naturally associated phyllobacteria due to its topography as it offers various colonization and infiltration sites. Contamination of vegetables may occur through pre-harvest and post-harvest activities and include cross-contamination from infected personnel. The study aimed to examine the prevalence of microbial contamination for spinach (Spinacia oleracea L.) and cabbage (Brassica oleracea var. capitata L.) at various farms based on the production and agronomic systems in South Africa, Free State. In addition, the study further demonstrated that several potentially pathogenic microorganisms are present in common fresh leafy greens such as spinach and cabbage. Almost all the analyzed and identified microorganisms were reported to be opportunistic pathogens. Spinach and cabbage phyllosphere were contaminated mostly with Staphylococcaceae, Pseudomonadaceae, Morganellaceae, Caulobacteraceae, Moraxellaceae, Burkholderiaceae, Yersiniaceae, Xanthomonadaceae, Listeriaceae and total coliform species. The predominant genera were Staphylococcaceae, Morganellaceae and Pseudomonadaceae in spinach and cabbage isolates. The analysed isolates revealed a high level of contamination by opportunistic pathogens such as total coliform, Morganellaceae and Staphylococcaceae reflecting a deficit of good agricultural production systems and hygiene practice. From the study, the authors could also demonstrate the rapid rate at which these pathogens can spread through the food chain and cause food poisoning. It is concluded that the bacterial contamination frequency and degree in this present study was significantly considerable and recommended that these vegetables be thoroughly washed before any consumption especially when consumed uncooked, specifically in green salad. Moreover, preparing cooked meals using these leafy vegetables would be better. [ABSTRACT FROM AUTHOR]

This paper focuses on the development of a framework for strategy considerations for water resources management in South Africa to meet the development goals in the municipal and agricultural sectors. The north western part of South Africa experiences severe periods of drought and according to the climate change projections, will be most vulnerable to future climate induced water supply stress. A framework for selecting appropriate strategies is presented. A series of potential adaptation strategies most suitable for long term adaptation are discussed. These include both supply and demand side strategies. Barriers and obstacles to implementing these strategies include human and financial resource deficiencies at local municipal and community levels. [ABSTRACT FROM AUTHOR]

• We combine GPN theory with a water stewardship approach. • Export-oriented fruit producers in South Africa face a range of water risks. • To ensure their water security, they deploy different mitigating strategies. • These strategies depoliticise post-apartheid water allocation in South Africa. • This has negative impacts for water governance & actors beyond the fruit industry. This paper investigates the strategies export-oriented agricultural firms use to mitigate water risks. By doing so, we respond to a gap in Global Production Network (GPN) scholarship, whereby the relationships between economic production and the natural environment have received insufficient attention. We build on GPN 2.0′s formulation of environmental risk as a causal driver of firms' strategies, combining it with the concept of water stewardship. Empirical evidence is drawn from the export-oriented fruit industry in South Africa's Western Cape. We find that while current water risk mitigating strategies are successful in securing water for fruit producers, these also have negative impacts on the wider South African water governance regime by depoliticising water allocation. In post-apartheid South Africa, this is deeply problematic. Our findings emphasise the imperative for research to consider the wider socio-political and ecological context when evaluating firm strategies to mitigate water and other environmental risks in South Africa and beyond. [ABSTRACT FROM AUTHOR]

Smallholder farmers in South Africa find it challenging to participate in the modern economy. Most of these farmers have limited access to credit and insurance, and to markets in which to sell their produce. This paper reviews ethnographic research data and argues that smallholder farmers struggle to take part in modern agricultural value chains in South Africa. System dynamics modelling is used to understand the dynamics relating to agricultural value-chain participants, and to determine whether the ethnographic research data is sufficient to answer the question as to which value-chain participants potentially have the largest impact on smallholder farmers. The modelling results show that banks may have the potential to trigger an impact on smallholder farmers' productivity that could then attract other value-chain industries to take part in efforts to support these farmers. Smallholder farmers could become a long-term viable and sustainable option for increasing food security in South Africa. However, this study has its limitations. The data used from existing ethnographic research, conducted by way of semi-structured interviews with valuechain participants, is limited and is not able to answer questions such as: (i) how much each industry is prepared to engage with smallholder farmers in the event of other industries being prepared to do the same; and (ii) how long it will take each industry to react to a willingness to engage. Ongoing research is required to extend the interviewee base and data in order to answer these questions and for the model to be completed and used for policy guidance. [ABSTRACT FROM AUTHOR]

This paper develops and applies a simple non-parametric methodology for estimating the direct and indirect economic contribution of small-scale black agriculture in South Africa. The direct contribution is understood as the per capita food expenditure savings of agriculturally-active households relative to other households. Meanwhile, the indirect contribution is understood as the expenditure savings enjoyed by rural households by virtue of residing in areas characterised by widespread, albeit modest local production. The analysis is based on the Income and Expenditure Survey of 2010/11. Further to estimating the magnitude of the direct and indirect contribution of small-scale agriculture, the paper seeks to provide econometric evidence for the economic logic underpinning the indirect economic contribution of small-scale black agriculture. [ABSTRACT FROM PUBLISHER]

The objective of this paper is to analyse the impact of land access and livelihood strategies to well-being of households in Mnquma, Eastern Cape. A cross-sectional research design was utilised to collect data from 105 randomly selected households using a well-structured questionnaire. Descriptive statistics was then used to profile livelihood strategies and characteristics such as age, gender, years of farm experience, the availability of water and land for crop production and the income farmers generate from the sale of crops produced. Multinomial logistic regression results demonstrated that land size and location have a positive significant influence (p = 0.001) on household well-being. It is concluded that, though land size has a positive influence on well-being, expanding farms through adding plots and distant farming hinders the attainment of well-being. Moreover, households with large number of dependents and those working in exclusive farming are disadvantaged in the attainment of well-being. There is therefore room to enhance progress in attainment of well-being through reducing the distance to farms and promoting diversification of livelihood strategies. The Eastern Cape department of Agriculture and Rural Development is advised to support distant farmers with settlements in their destinations. [ABSTRACT FROM AUTHOR]

One of the key components essential to the productivity of small-scale farmers who secured farms through the land redistribution programme in South Africa is access to reliable sources of water for irrigation. In this study, we deployed a stakeholder-oriented qualitative research methodology to understand the extent to which land reform farming schemes in Bela-Bela and Greater Sekhukhune have been able to access water and use it to enhance their agricultural production. We were keen to identify and articulate the water-related challenges and missing ingredients for successful agricultural production on the new farming schemes. The study found that access to water for irrigated agriculture is not guaranteed for most of the emerging farmers and they do not have the finance needed to invest in sustainable water supply systems for irrigation. As a result, the majority of the farmers in our study sample have not been able to realize any meaningful agricultural production, with their farming schemes being either underutilized or not functioning at all. Other key challenges include lack of finance, high costs of electricity, and lack of farming knowledge among the emerging farmers. The paper concludes that there is need for key actors in the development sector to provide more substantive post-land transfer support and ensure better access to water for the emerging farmers. This will enhance the farmers' chances of realizing more meaningful agricultural production while improving their livelihoods. [ABSTRACT FROM AUTHOR]

Food self-sufficiency is an important contributor to food security, and one of the potential solutions to this problem is increased food production productivity through agricultural biotechnology. In this paper, we study the relationship between a country's genetically modified (GM) food policy and the food self-sufficiency rate (SSR) under conflicting interests, with the example of GM crop regulation and GM maize production in South Africa. We develop a theoretical model of a small open economy and investigate the GM food policy as the outcome of a GM and a non-GM food groups' lobbying game that follows the model of Grossman and Helpman. The government maximises its payoff by considering the weighted sum of social welfare and contributions from interest groups. Our findings suggest that a lower GM food regulation supports domestic agricultural production, and we offer potential reasons why a country that has a low SSR still has a strict GM food policy regulation. We also find that the food SSR is a biased measure of food availability when both production and consumption change simultaneously. [ABSTRACT FROM AUTHOR]

The impacts of climate change on ecosystems are profound and, if not mitigated, may pose a major threat to the environment. The challenges of climate change in South Africa have resulted in various adverse effects, such as heatwaves, droughts, and floods, especially in provinces like KwaZulu-Natal (KZN). This has huge consequences for agricultural production. Despite government efforts and strategies to mitigate the effects of climate change on the environment, many environmentalists argue that existing policies are inactive, while others recommend a consolidated approach involving key stakeholders. The objective of this study is to provide a critical overview of the impact of climate change on agricultural production in the province of KZN. In this way, the relevant context of the current problems is presented, and strategies for dealing with the negative impacts of climate change on agriculture are recommended. According to this study, climate change measures need to be embedded in national sustainable development strategies. These measures will only be successful if they are integrated into broader strategies to improve national development. Therefore, policymakers should leverage their positions to make informed and thus impactful decisions on relevant climate change issues affecting the agricultural sector in the province. [ABSTRACT FROM AUTHOR]

Discussions on land use and land reform too often reduce the land question to the agrarian question. Yet a rich empirical literature in the region shows that producing agricultural goods is really only one of many, many ways in which land is used, and not necessarily the most important. This paper argues that many of the ways in which land is used (often labelled 'social' or 'cultural') are in fact best understood as part of processes of distribution that are a vital part of many poor Southern Africans' livelihoods. An exclusive focus on production as the problem, and more productive agriculture as the solution, blinds us both to most of the things that people, in fact, do with land, and to many of the most important issues facing low-income rural people. Giving a more central place to processes of distribution may help us to see just how much is lost if we allow distribution to be treated as an afterthought to production - or the land question to be reduced to the agrarian question. [ABSTRACT FROM AUTHOR]

This paper intends to contribute to the ongoing debate about whether and how restructured agri-food markets can provide viable market opportunities for small-scale farmers in South Africa. It analyses contract farming from the small-scale farmer perspective to better understand the implications for small-scale farmers of contractual arrangements with processing and/or marketing firms. The paper, based on empirical research conducted in the Limpopo Province of South Africa using a combination of qualitative and econometric analyses, argues that contract farming is not a panacea for small-scale farmers. On the one hand, contract farming improves agricultural production for contract farmers who benefit from increased incomes, enables better access to services and resources, and creates new opportunities to participate in markets. However, on the other hand, the results show that contract farming remains limited and mostly involves the already better-off, who have benefitted from specific development paths and public support. This case study shows that contract farming in itself does not appear to provide an efficient means of reducing poverty, nor does it provide an institutional tool through which to improve rural livelihoods. It does, therefore, not represent a tool appropriate for the majority of small farmers or for redressing the historical imbalances in the South African agricultural sector. [ABSTRACT FROM PUBLISHER]

This paper quality adjusts machinery inputs for South African agriculture. It does this by treating different qualities of machinery as separate inputs. Thus, quality adjustment becomes quantity adjustment when there is sufficient disaggregation. This matters because many mechanical and chemical inputs have been transformed by technological progress. If this is not taken into account, the inputs are under-counted and total factor productivity (TFP) calculations are not accurate. Gandidzanwa and Liebenberg (2016) estimated the proportion machinery to implements and used this series to scale up the tractor series, instead of assuming fixed proportions. This study quality adjusts the machinery and implements input series by applying a greater level of disaggregation and by careful monitoring of model turnover. The number of models monitored was increased tenfold. Removing tractor improvements resulted in a price index that grew more slowly than the official index. Thus, the tractor stock value series is deflated less and by 2015 was 53% larger than in the official figures. The service flow entering the TFP calculations will be similarly increased, so there is less residual to be attributed to TFP growth. If all the inputs were equally undercounted, the TFP estimate would be double its true value. [ABSTRACT FROM AUTHOR]

It is well accepted that biological innovations, particularly varietal improvements, have greatly contributed to agricultural yield and output growth in the past. At the same time, public funding for breeding programmes such as at the Agricultural Research Council in South Africa has dwindled. In an effort to confirm the importance of continued funding of varietal improvement programmes, this paper estimates the benefits from wheat varietal innovations and attributes them to the different institutional sources (public, private and others) that have contributed to varietal changes in South Africa. The empirical analyses used data on market shares of wheat varieties planted by farmers and annual quantities of wheat produced across different wheat-production areas in South Africa (summer dryland, dryland winter, and irrigation). A vintage regression model was estimated to calculate the proportional yield gain from wheat varietal improvements. The results indicated that the rate of gain in yield as a result of releases of new wheat varieties (variety research) was 0.8 per cent per year (equivalent to 19.84 kg/ha/year) for dryland summer varieties, and 0.5 per cent for both irrigation (equivalent to 32.20 kg/ha/year) and dryland winter varieties (equivalent to 16.65 kg/ha/year). The attribution of benefits among different institutional sources confirms that not accounting for attribution of benefits by source and time period results is overestimation of benefits to any specific research programme. Attribution of benefits by institutional source showed that Sensako dominated, while the share of the ARC-SGI substantially declined, after deregulation of the wheat sub-sector. The results highlight the impact of the decline in public funding for wheat variety improvement research after deregulation and provide a strong argument for continued public funding for variety improvement in South Africa. [ABSTRACT FROM AUTHOR]

The article presents a case study that offers an analysis of the effect of deregulation and trade reform on the agricultural sector that is composed of a developed commercial sector and a farming sector in South Africa. It notes the role of the deregulation and trade reform to the substantial changes in innovation in the commercial sector that includes wine and fruit contributing to the change in composition in the light of limitations to innovation in agriculture.

This paper argues that within the range of complementary activities necessary to secure the food security of marginalised groups in South Africa in places such as Greater Sekhukhune, the aspect of agricultural production is often neglected. A comprehensive approach to food security should focus on exploiting opportunities around increasing local food availability through production, as well as stimulating food accessibility by, for example, supporting small enterprises through micro-credit, and supporting food utilisation through education. In this way a range of options is created that vulnerable people can adopt to promote their livelihoods beyond survivalist strategies. This paper explores the issue of agricultural production within Greater Sekhukhune to provide insights into the challenges facing a comprehensive food security strategy that would guarantee food supply through a range of interventions. The study in the Greater Sekhukhune District in Limpopo Province was conducted through two sets of household surveys (2004 and 2006) and the responses to the agricultural production part of these surveys are discussed. Marked changes from 2004 to 2006 were observed. For "agrarian reform" to be a success, the necessary institutional framework needs to be in place to enable a broad range of services from government and non-governmental actors. The facilitation of such "joined up government", although in existence in theory, requires concerted political will to become a reality. [ABSTRACT FROM AUTHOR]

The aim of this paper is to assess the amount of “policy space” available to increase tariff protection in South African agriculture. To this end, formal definitions for agricultural produce, actual import data, applied tariff data and bound tariff rates and tariff quota information were used to investigate the extent to which it is possible and feasible to increase tariffs. The analysis shows that in general the policy space available to South African agriculture is limited because of, among others, WTO binding and treaty obligations under the EU and SADC agreements. Furthermore, it does not make policy sense to increase protection on most other products. [ABSTRACT FROM AUTHOR]

This paper reviews the problems of soil fertility under small-scale crop production systems in KwaZulu-Natal province in South Africa. The role of manure in maintaining and replenishing soil fertility for crop production and the fate of manure once applied to the soil are reviewed and discussed. Special emphasis is placed on cattle and chicken manure and the role that soil texture plays in the mineralization of nitrogen (N) and phosphorus (P). In KwaZulu-Natal, small-scale farmers' maize ( Zea mays L.) yields are between 1.0 and 1.5 mg ha -1 , which is very low compared with the maize potential yield of 4.5 mg ha -1 for the area under small-scale farming conditions. A review of available literature on the use of manure for soil-fertility management showed that manure is a good source of plant nutrients. The use of manure is an old technology that is appropriate for small-scale farmers in South Africa, as most farmers practice mixed livestock and crop farming. Despite the use of manure dating back many years, small-scale farmers in South Africa are not fully exploiting the available manure for replenishing the fertility of their soils. [ABSTRACT FROM AUTHOR]

A critical analysis of conventional water resources assessments and re-visiting the on-farm water balance suggests large scopes for water productivity improvements in small-holder rainfed farming systems in drought prone environments of Eastern and Southern Africa. The paper addresses key management challenges in trying to upgrade rainfed agriculture, and presents a set of field experiences on system options for increased water productivity in small-holder farming. Implications for watershed management are discussed, and the links between water productivity for food and securing of water flow to sustain ecosystem services are briefly analysed. Focus is on sub-Saharan Africa hosting the largest food deficit and water scarcity challenges.The paper shows that there are no agro-hydrological limitations to doubling on-farm staple food yields even in drought prone environments, by producing more “crop per drop” of rain. Field evidence is presented suggesting that meteorological dry spells are an important cause for low yield levels and it is hypothesised that this may constitute a core driver behind farmers risk aversion strategies. The dry spell induced risk perceptions contribute amongst others to soil nutrient mining due to insignificant investments in fertilisation. For many small-holder farmers in the semi-arid tropics it is simply not worth investing in fertilisation (and other external inputs) as long as the risk for crop failure remains a reality every fifth year with risk of yield reductions every second year, due to periodic water scarcity during the growing season (i.e., not necessarily cumulative water scarcity).Results are presented from field research on small-holder system innovations in the field of water harvesting and conservation tillage. Upgrading rainfed production systems through supplemental irrigation during short dry-spells is shown to dramatically increase water productivity. Downstream implications of increased upstream withdrawals of water for upgrading of rainfed food production are discussed.Finally it is argued that some of the most exciting opportunities for water productivity enhancements in rainfed agriculture are found in the realm of integrating components of irrigation management within the context of rainfed farming, e.g., supplemental or micro irrigation for dry spell mitigation. Combining such practices with management strategies that enhance soil infiltration, improve water holding capacity and plant water uptake potential, can have strong impact on agricultural water productivity. This suggests that it is probably time to abandon the largely obsolete distinction between irrigated and rainfed agriculture, and instead focus on integrated rainwater management. [Copyright &y& Elsevier]

The availability of irrigation water greatly impacts on the profitability of the agricultural sector in South Africa and is largely determined by prudent decisions related to water release strategies at open-air irrigation reservoirs. The selection of such release strategies is difficult, since the objectives that should be pursued are not generally agreed upon and unpredictable weather patterns cause reservoir inflows to vary substantially between hydrological years. In this paper, a decision support system is proposed for the selection of suitable water release strategies. The system is based on a mathematical model which generates a probability distribution of the reservoir volume at the end of a hydrological year based on historical reservoir inflows. A release strategy is then computed which centres the expected hydrological year-end reservoir volume on some user-specified target value subject to user-specified weight factors representing demand satisfaction importance during the various decision periods of the hydrological year. The probability of water shortage for a given year-end transition volume may be determined by the decision support system, which allows for the computation of acceptable trade-off decisions between the fulfilment of current demand and the future repeatability of a release strategy. The system is implemented as a computerised concept demonstrator which is validated in a special case study involving Keerom Dam, an open-air reservoir in the Nuy agricultural district near Worcester in the South African Western Cape. The system's strategy suggestions are compared to historically employed strategies and the suggested strategies are found to fare better in maintaining reservoir storage levels whilst still fulfilling irrigation demands. [ABSTRACT FROM AUTHOR]

Climate change is expected to substantially reduce future crop yields in South Africa, thus affecting food security and livelihood. Adaptation strategies need to be implemented to mitigate the effect of climate change-induced yield losses. In this paper, we used the WEAP-MABIA model, driven by six CORDEX climate change data for representative concentration pathways (RCPs) 4.5 and 8.5, to quantify the effect of climate change on several key crops, namely maize, soya beans, dry beans, and sunflower, in the Olifants catchment. The study further investigated climate change adaptation such as the effects of changing planting dates with the application of full irrigation, rainwater harvesting, deficit irrigation method, and the application of efficient irrigation devices on reducing the impact of climate change on crop production. The results show that average monthly temperature is expected to increase by 1 °C to 5 °C while a reduction in precipitation ranging between 2.5% to 58.7% is projected for both RCP 4.5 and RCP 8.5 relative to the baseline climate for 1976–2005, respectively. The results also reveal that increased temperature and decreased precipitation during planting seasons are expected to increase crop water requirements. A steady decline in crop yield ranging between 19–65%, 11–38%, 16–42%, and 5–30% for maize, soya beans, dry beans, and sunflower, respectively, is also projected under both RCPs climate change scenarios. The study concludes that adaptation measures such as the integration of changing planting dates with full irrigation application and the use of rainwater harvest will help improve current and future crop production under the impact of climate change. [ABSTRACT FROM AUTHOR]

This paper empirically examined the relationship between agro-processing sub-sector output and agricultural sector employment in South Africa by using time series data from 1975-2015. The study employed ARDL-bounds testing approach to examine the existence long-run equilibrium relationship. The result of the ARDL test confirmed the existence of long-run relationship among the variables examined. The long-run estimate result revealed that the relationship between agro-processing output and agricultural sector employment is negative in the long-run. The study further examined the causality between agro-processing output and agricultural sector employment using TYDL causality test and it observed a unidirectional causal relationship running from agro-processing output to agricultural sector employment. While it is deduced that agro-processing sector output is found to be unable to promote agricultural sector employment, this study recommends stimulation of agricultural export for agricultural sector employment generation in South Africa. [ABSTRACT FROM AUTHOR]

Market-oriented agrarian transformation challenges notions of the 'communal' nature of customary land. This paper foregrounds the emergent patterns of land access in the context of an expanding tree-crop commodity frontier in the former 'homeland' of Venda, South Africa. We develop an actor-focused, assemblage approach and use it to identify how three entrepreneurial, accumulating tree-crop farmers engaging in commercial macadamia nut and avocado production mediate land access through a combination of historic access, social networks, insider-knowledge, access to capital and brokering of good community relations through land sharing and job provisioning. We approach this mediation as (re)-assembling practices that unfold within the particular conditions at this historical conjuncture and the gradual agricultural de-activation in food crop production and urbanisation occurring locally. These practices blend collective and private elements into an unwieldy, land-associated assemblage in ways that challenge the political economical reading of the commoditisation trend as a 'the single land grab', 'accumulation from below' or as leading to the neoliberalisation of African land tenure systems. We argue that this reconstruction 'from below' requires attention to the way situated practices forge relations to other (translocal)assemblages, local agency in shaping land- and production relations, the opportunity structure related to changes in the local political economy and a sensibility to the multiple, possible futures of this frontier moment. [ABSTRACT FROM AUTHOR]

South Africa, while nationally acknowledged as food secure, grapples with persistent household food insecurity, particularly in rural areas. Addressing this issue, the implementation of community gardens has gained traction. This mixed methods study focuses on the impact of community gardens on food security at the household level, exemplified by the community gardens in ward 18 of Umdoni Municipality. These gardens not only provide sustenance but also generate supplementary income through surplus crop sales. However, climate change threatens food systems and vulnerable livelihoods, necessitating assessment. A survey of 120 community garden participants was conducted, employing questionnaires and focused group discussions to gauge perspectives on crop production and food security. The survey revealed that 58.3% of participants did not receive sufficient food from community gardens, while 41.7% reported adequate supply. Only 15.8% achieved food security, with the majority (40%) experiencing moderate food insecurity. Challenges cited encompassed shifting rainfall patterns, temperature fluctuations, heightened disease, and pest pressures, and altered planting seasons. Intriguingly, despite their establishment, community gardens appeared ineffective in substantially improving household food security. These findings underscore the need for enhancing productivity and climate resilience within community gardens. Future research could illuminate strategies to bolster garden productivity and mitigate climate change impacts. [ABSTRACT FROM AUTHOR]

South African agriculture has the potential to stimulate growth in other economic sectors, but dwindling budgetary allocations to agriculture over time and the nature of other impacting factors on the value of agricultural production have not received much attention in recent times. Therefore, the present study examined the effects of government expenditure in agriculture, annual average rainfall, consumer price index, food import value, and population on the value of agricultural production with a specific focus on government expenditure in agriculture for the period 1983 to 2019. Using the Johansen cointegration test, the results reveal that there is a long-run relationship among the variables. The Granger causality test results suggest that government expenditure in agriculture does not Granger cause the value of agricultural production. However, the two variables are linked through other variables in the model, such that an increase in government expenditure in agriculture, average annual rainfall, and population were shown to ultimately increase the value of agricultural production based on vector autoregressive (VAR) model analysis. In contrast, an increase in the consumer price index and food import value is detrimental to the value of agricultural production. These studies' findings have policy implications for increased government expenditure. [ABSTRACT FROM AUTHOR]

One method to inform decisions with respect to sustainable, efficient and equitable water allocation and use is water footprint assessment (WFA). This paper presents a preliminary WFA of South Africa (SA) based on data for the period 1996-2005. Crop production was found to contribute about 75% of the total water footprint of national production. The total water footprint of crop production is mainly composed of five crops: maize, fodder crops, sugarcane, wheat and sunflower seed, which account for 83% of the crop water footprint. The average water footprint of a South African consumer is 1 255 m3/yr, below the world average of 1 385 m3/yr, and is dominated by the consumption of meat (32%) and cereals (29%). About one fifth of this water footprint of consumption is external to SA. While SA is a net virtual water importer, the virtual water trade analysis revealed that a large share of blue water consumption is related to export. Sustainability concerns are that the major river basins face severe blue-water scarcity for extended periods of the year, and that water pollution levels related to nitrogen and phosphorus were found to be unsustainable in all river basins in SA. Efficient allocation and use of water is investigated by means of comparing the consumptive water footprint to global benchmark values, as well as the economic green- and blue-water productivity and the economic land productivity of the crops cultivated in SA. Furthermore, crops with specific potential for biofuel production are assessed. Lastly, recommendations to address the identified issues are given. [ABSTRACT FROM AUTHOR]

World agriculture, despite numerous supply and demand challenges, has to increase its production capacity significantly to satisfy the increased demand for food. In addition, the sector has a significant developmental role to play. Access to credit is, however, a key enabler in this regard. This paper reports on a countryspecific study performed to promote the success of agricultural value chain financing in South Africa, with a specific focus on the financing of agricultural production. The literature review provides a global overview of agricultural production, agricultural value chain financing and the potential role of leading chain actors as connecting institutions. The empirical study provides strong evidence of significant relationships between the dependent variable of the study, namely the perceived success of agricultural value chain financing in South Africa, and the intervening and independent variables. The independent variables value chain integration, strategic partnering, risk management, supporting services, sustainable production, product range and external financing positively influence the intervening variable - value chain competitiveness. In the same manner, the intervening variable of value chain competitiveness positively influences the perceived success of agricultural value chain financing in this study. [ABSTRACT FROM AUTHOR]

In many agricultural areas, crop production has decreased due to a lack of water availability, which is having a negative impact on sustainability and putting food security at risk. In plants, the plasticity of the root system architecture (RSA) is considered to be a key trait driving the modification of the growth and structure of roots in response to water deficits. The purpose of this study was to examine the plasticity of the RSA traits (mean root diameter, MRD; root volume, RV; root length, RL; and root surface area, SA) associated with drought tolerance in eight Lagenaria siceraria (Mol. Standl) genotypes, representing three different geographical origins: South Africa (BG-58, BG-78, and GC), Asia (Philippines and South Korea), and Chile (Illapel, Chepica, and Osorno). The RSA changes were evaluated at four substrate depths (from 0 to 40 cm). Bottle gourd genotypes were grown in 20 L capacity pots under two contrasting levels of irrigation (well-watered and water-deficit conditions). The results showed that the water productivity (WP) had a significant effect on plasticity values, with the Chilean accessions having the highest values. Furthermore, Illapel and Chepica genotypes presented the highest WP, MRD, and RV values under water-deficit conditions, in which MRD and RV were significant in the deeper layers (20–30 and 30–40 cm). Biplot analysis showed that the Illapel and Chepica genotypes presented a high WP, MRD, and RV, which confirmed that these may be promising drought-tolerant genotypes. Consequently, increased root diameter and volume in bottle gourd may constitute a response to a water deficit. The RSA traits studied here can be used as selection criteria in bottle gourd breeding programs under water-deficit conditions. [ABSTRACT FROM AUTHOR]

Since the dawn of democracy in 1994, the South African government has had various farmer support programmes. This study investigated the impact of the Recapitalisation and Development Programme (RADP) on agricultural production in Gauteng province, South Africa. A survey was conducted involving all 51 beneficiaries of RADP in Gauteng province. Primary data were collected through face-to-face interviews using a semi-structured questionnaire. Descriptive statistics and two-tailed t-test analysis were performed on the data using the Statistical Package for the Social Sciences (SPSS) version 24. The results show that the overall impact of RADP on agricultural production (crops and livestock) was not statistically significant. However, the area cultivated with maize and spinach improved significantly, while potatoes, soya beans, cabbage, tomatoes and green peas showed an insignificant increase in their cultivated area. It is recommended that key production requirements be identified to assist RADP in providing support that improves the agricultural production of the beneficiaries. [ABSTRACT FROM AUTHOR]

Abstract: This paper revisits the diagnostic use of industry-wide sugarcane (Saccharum sp. hybrid) modelling and monitoring in South Africa for gaining a better understanding of production trends and the strategies required to address temporal and spatial yield variation. Such reviews have been conducted annually since 2008, by comparing the ratio of actual to simulated (potential) average sugarcane yields for 14 sugar mills with that of preceding seasons (since 1980). Actual yields are determined from total amount of cane crushed at the mill and the estimated area harvested as determined from mill records and grower surveys. Potential yields are determined by using the Canesim model with daily weather data for 48 homogenous agro-climatic zones. Widening yield gaps in some key producing regions and significant differences between regions indicated the need to investigate the impact of non-climatic factors such as pests, diseases, and sub-optimal agronomic management, even though this analysis is still qualitative and incomplete, and not fully objective. Factors that were highlighted as likely causes of suboptimal production were damaging effect of a new pest (sugarcane thrips), inadequate nutrition and inadequate replanting, apparently linked to unfavourable socio-economic conditions; even more so for small-scale growers than for large-scale growers. In addition to providing a service that is valued by the industry, the annual reviews have contributed to strengthening co-operation between researchers of distinct disciplines as well as between researchers and canegrowers, and to help identify priorities for further research. The quality of the analysis could be further improved by more accurate and timely estimates of the area harvested, improved resolution of yield data and extended surveys of pests, diseases and other yield limiting or reducing factors. [Copyright &y& Elsevier]

This paper considers epistemology in economics, looking at the ways in which theory, observation and measurement are combined. Agricultural economics is a policy science and so scientific research programmes operate simultaneously with political action programmes. Taking policy positions and advising government makes scientific detachment impossible. With this as background progress in production economics is considered, especially regarding technology, productivity and the returns to R&D. The position taken is that progress has been considerable and we can by now measure technological progress and show how it is generated by agricultural R&D. Almost all the studies show that this is an investment with a high rate of return. The main point of the study is that almost all the agricultural economics research that has made this possible was conducted in the USA, where the theory and data were in place when needed to convince the politicians that public funding should be maintained at adequate levels. The payoff is that agricultural productivity has grown monotonically in the USA. The UK case shows the costs of our profession failing to mount an effective political action programme in the area at time of Mrs Thatcher's cuts in the early 1980s. The result was about sixteen years of negative productivity growth. This should act as a warning for South Africa, which is pretty clearly cutting R&D and following the UK productivity path. These failures are so costly, it is odd that only USA seems to have the knowledge and funding required for steady productivity growth. [ABSTRACT FROM PUBLISHER]

This paper models dairy farms in KwaZulu-Natal, South Africa, emphasising the complexities unique to this multi-product industry. Net and gross output approaches to measuring production are discussed and then tested using panel data from 37 dairy farms in KwaZulu-Natal from 1999 and 2007. Production functions for the three outputs: milk production, animals and farm-produced feed, are fitted as a simultaneous system to model the farms' production activities. This simultaneous model is complemented by a single equation reduced form that is fitted as a frontier, which allows estimation of the relative efficiencies of the individual farms. The results show that, with data this detailed, it is possible to refine the model until it fits very tightly. Indeed, in the gross output model that includes cows there is nothing left to call inefficiency and what was clearly a frontier becomes a mean response function. [ABSTRACT FROM AUTHOR]