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PurposeThe authors assess the development potential of cowpea beyond grain in local markets in Mali by: (1) identifying trader types and types of cowpea products sold; (2) examining trader roles; (3) estimating gross margins and their determinants; and (4) discussing policy opportunities to further develop the value chain.Design/methodology/approachThe authors analyze data collected through observation and semi-structured questionnaires from 487 sellers in 26 markets, including market, seller, and product characteristics. The authors also calculate gross margins and conduct a regression analysis to identify influential factors.FindingsThe authors identify several types of cowpea sellers in local markets, including processor-retailers, retailers of fresh leaves and fodder, and grain retailers, collectors and wholesalers. Women dominate the marketing of processed products and fresh leaves. The marketing of boiled cowpeas offers retailers higher margin rates compared to fritters and pancakes. Grain sellers, who are mostly men, have lower margins but sell larger quantities. Processor-retailers bring more value to the cowpea value chain. Specialization of the seller in cowpea, regional location of the market and day of the market fair all influence gross margins.Research limitations/implicationsFuture work should explore consumer preferences for different types of cowpea products.Originality/valueThis study of the cowpea value chain in Mali has revealed the multidimensional character of the cowpea plant, which goes far beyond its grain and highlight the important roles played by women.

Agricultural policies can change incentives to grow one crop versus another, affecting farm family nutrition. Governments in Sub-Saharan Africa have implemented fertilizer subsidies with the aim of boosting agricultural productivity and enhancing food security. Yet, little is known about the intrahousehold nutritional consequences of fertilizer subsidies that often favor the production of starchy food staples—supporting calorie consumption but not micronutrient intake. We test the effects of fertilizer subsidies on gender-differentiated value of production and sales of target crops and the diet quality of female plot managers in Malian farming households. We find positive effects of the subsidy on production and sales whether plots are managed by men or women. However, more than half the women in our sample do not consume the minimum number of food groups needed for an adequate diet. Subsidized fertilizer significantly contributes to the chances that female plot managers will meet this threshold, and to consumption of iron-rich foods. Positive effects appear to be offset by the negative association of diet quality with all subsidized fertilizer received by other plot managers—perhaps because it leads to greater farm orientation toward targeted cereals and cotton. Disaggregating data by gender provides policy insights. Observing the low use rates of female plot managers for subsidized fertilizer that is obtained 51% of the time through others, ensuring that they have direct access may support higher application rates. If the subsidy program is to continue, considering nutrient-rich crops as part of the subsidy package might enhance nutritional outcomes.

The conservation of landraces is fundamental to safeguarding crop diversity, food security, and sustainable production. Jala is a special maize landrace from the region in and around the Jala Valley of Mexico that produces the largest ear and tallest plant of all maize landraces in the world. Changing socio-economic and environmental conditions in the Jala Valley could lead to the genetic erosion of the ancestral Jala landrace, which can have global consequences. This study outlines the sequence of events in the history of Jala and describes the evolution of strategies for complementary in situ and ex situ conservation of maize genetic resources that are being developed and tested by the Jala Rematriation Project. The concept of dynamic conservation is discussed and applied to the specific case of Jala. The rematriation approach could be instrumental in creating an environment that enables the dynamic conservation of maize landraces in Mexico, the primary centre of this crop’s origin and diversity, and throughout its ancestral range in the Americas.

Genetic variation in wheat is needed to address global food security challenges, particularly as climates change. Crop wild relatives are unique reservoirs of useful alleles for crop improvement and are important components of genebank collections. We analyzed how the derivatives of ‘goat grass’ (Aegilops tauschii) have been used to widen the genetic base for wheat breeding and surveyed wheat breeders to elicit adoption estimates. Synthetic hexaploid wheat (SHW) is derived by crossing goat grass with durum wheat, serving as a bridge to transfer desirable traits into modern varieties of bread wheat. Our data show that wheat scientists used 629 unique accessions from 15 countries for pre-breeding, producing 1577 primary SHWs. These derivatives represented 21% of the germplasm distributed by the genebank of the International Maize and Wheat Improvement Center between 2000 and 2018. Over the period, more than 10,000 samples of SHW were sent to 110 institutions in 40 countries, with rising numbers of synthetic hexaploid-derived lines (SHDL) included in international nurseries. Lines were screened for major diseases of wheat. At least 86 varieties have been selected from SHDL and released in 20 countries. Survey estimates indicate the highest scale of adoption in southwest China and India, with 34% and 7% of reported wheat area, respectively. These varieties demonstrate resistance to pests and pathogens, high yield potential, good quality attributes, and suitability for biofortified wheat.

The World Agroforestry (ICRAF) in Kenya plays a key role in conserving tree genetic diversity, thereby contributing to the delivery of ecosystem services in tree-based production systems. This study explored the benefits of using the two most popular fodder tree species among smallholder farmers, sourced from the ICRAF genebank: Calliandra calothyrsus (Calliandra) and Gliricidia sepium (Gliricidia). Through a survey of key informants and genebank users, we examined the benefits derived from the adoption of Calliandra and Gliricidia and the unique role of the ICRAF genebank as the main source of tree germplasm for Kenyan smallholders. The constraints to germplasm access could limit protein fodder supply and the intensity of fertilization in farmers’ fields, which in turn could affect productivity in livestock and maize sectors in Kenya. We find that improved food security, higher incomes, increased milk production, reduced vulnerability to drought, reduced soil erosion, and enhanced soil fertility are identified as the main farmer-perceived benefits linked to the use of Calliandra and Gliricidia. The findings demonstrate the importance of agroforestry in the delivery of ecosystem services, in the light of climate change and heightened pressure for sustainable agricultural practices, and the crucial role of the genebank in conserving and distributing unique, high quality tree germplasm.

Using survey dataset collected from nearly 9000 farmers along with pedigree and evaluation data, this study measures the contribution of the International Rice Genebank (IRG) to varietal improvement and rice productivity of farmers in Eastern India. We empirically test the relationship of ancestry to productivity changes while controlling for the effects of other farm inputs and environmental factors. Estimated coefficients indicate that a 10% increase in the genetic contribution of IRG accessions to an improved rice variety is associated with a yield increase of 27%. Through pedigree analysis, we also confirm that 45 to 77% of the genetic composition of improved rice varieties is derived from the genes of IRG accessions. Peta, Dee Geo Woo Gen, and Fortuna are the three most popular progenitors with definite IRG contribution. High genealogical diversity likely results from the crossing of germplasm received from multiple countries of origin, which also confer multiple, functional trait combinations in a released variety. Further, our calculations reveal that the average coefficient of parentage of all pairwise combinations among the 10 most adopted rice varieties is 0.0973, indicating a high degree of latent genetic diversity. Findings demonstrate the valuable contribution of the genetic resources conserved and distributed by IRG to the development of improved rice varieties.

The International Potato Center (CIP) genebank conserves and facilitates access to highly diverse germplasm of potato, sweetpotato, and Andean roots and tubers as a global public good for food security. While it is generally understood that material from the CIP genebank has played an important role in the release of many CIP-related varieties grown by smallholder farmers in lower-income countries, the contribution has not been evaluated in quantitative terms. By applying the relative contribution of provenance based on pedigree data, we apportion the CIP genebank contribution of two released potato varieties: Pallay Poncho and Victoria. The estimated contribution of the CIP genebank to Pallay Poncho and Victoria is 35% and 72%, respectively. We then used an economic surplus approach to measure Victoria’s benefits in Uganda by attributing and valuing productivity gains. The gross benefit of Victoria in Uganda is estimated at USD $1.04 billion (2016 value), which exceeds the annual operating cost of the entire genebank over its lifetime. Seventy-two percent of the economic benefits corresponding to germplasm of Victoria are due to the CIP genebank contribution. Our findings demonstrate the magnitude of economic benefits generated by the use of conserved germplasm provided by the CIP genebank in crop improvement, which is only one of the several components of its total economic value. These results show that the availability of diverse germplasm is perhaps one of the most important elements in varietal development.

Genebanks play an essential role in a world where agricultural biodiversity has been lost from farming habitats, malnutrition persists as global population continues to rise, and farm productivity is vulnerable to climate change. We demonstrate the importance of the genebank of the International Center for Tropical Agriculture (CIAT) to the development of seven iron-biofortified varieties of climbing bean and the impact of their adoption on farm households in Rwanda. First, we link iron-biofortified varieties of climbing beans directly to the genebank through pedigree analysis and key informant interviews with the breeders who developed them. Second, we apply various econometric models to test the impact of adoption on yield, consumption, and purchase of beans by farming households in Rwanda, building upon previous research on bush beans. We based the analysis on a dataset of nearly 1400 households, collected in 2015 by HarvestPlus. We found that the scope of the genetic diversity housed in the bean collection at CIAT was fundamental to developing successful iron-biofortified beans. We found significant positive effects of climbing varieties on yields; however, we did not find significant effects on the amounts of beans consumed by households or bean purchases. Our results suggest that it is possible to trace the journey of an accession from its introduction in the genebank to its final use by farmers and consumers. Positive effects on yield generate incentives for adoption of iron-biofortified bean varieties, potentially boosting micronutrient consumption. Further research is needed to understand the factors affecting the adoption and impacts of climbing bean varieties.

This paper examines the vital role of genebanks in the conservation and use of plant genetic resources, highlighting the South Pacific’s version of the Irish Potato Famine and the organizational interdependence necessary to respond to disastrous losses in a cultivated food crop. We conducted an ethnobotanical fieldwork in Fiji, Vanuatu, and the Cook Islands, interviewing over 50 taro experts and farmers to gather the ‘Tale of Taro Leaf Blight’. Taro is the staple ‘prestige’ food crop of Samoa but in 1993, taro leaf blight (TLB), Phytophthora colocasiae, caused an almost 100% loss of the crop, threatening both food security and traditional cultural practices. Several international organizations were formed to conduct botanical expeditions to re-gather crop wild relatives of taro, Colocasia esculenta, from their various centres of origin. This parental material was used in a 10-year breeding cycle process to produce viable TLB-resistant varieties and replant the fallow fields of Samoa. The duty to safeguard these global accessions led to the formalization of CePaCT, which houses this core collection. The collection, conservation, multiplication, and distribution of taro has had a significant impact beyond the regional needs of the Pacific. Taro germplasm samples were distributed to countries worldwide affected by the blight, aiding in staving off potential famines and economic crises. This ancient aroid is one of the most consumed vegetables in the Pacific. It is an indispensable nutritional and caloric resource for subsistence farming nations, and carries deep ethnobotanical and cultural significance.

Background Potato landraces (Solanum spp.) are not only crucial for food security and sustenance in Andean communities but are also deeply rooted in the local culture. The crop originated in the Andes, and while a great diversity of potato persists, some landraces have been lost. Local communities and the genebank of the International Potato Center (CIP) partnered to re-establish some of these landraces in situ by supplying clean seed potatoes to farmers. Over time, the genebank formalized a repatriation program of potato landraces. Repatriation is the process of returning native germplasm back to its place of origin, allowing a dynamic exchange between ex situ and in situ conditions. So far, no comprehensive description of CIP’s repatriation program, the changes it induced, nor its benefits, has been carried out. Methods We addressed this research gap by analyzing CIP genebank distribution data for repatriated accessions, conducting structured interviews with experts of the repatriation program, and applying duration and benefit analyses to a survey dataset of 301 households. Results Between 1997 and 2020, 14,950 samples, representing 1519 accessions, were distributed to 135 communities in Peru. While most households (56%) abandoned the repatriated material by the fourth year after receiving it, the in situ survival probability of the remaining material stabilized between 36% in year 5 and 18% in year 15. Households where the plot manager was over 60 years old were more likely to grow the repatriated landraces for longer periods of times. While male plot management decreased survival times compared to female plot management, higher levels of education, labor force, wealth, food insecurity, and geographic location in the southern part of Peru were associated with greater survival times. Most farmers reported nutritional and cultural benefits as reasons for maintaining landrace material. Repatriated potatoes enabled farmers to conserve potato diversity, and hence, re-establish and broaden culinary diversity and traditions. Conclusions Our study is the first to apply an economic model to analyze the duration of in situ landrace cultivation by custodian farmers. We provide an evidence base that describes the vast scope of the program and its benefits.

Inefficient allocation of resources has been documented in West African farming systems where food is produced by extended family farms on multiple plots managed by different members. We revisit this question in Mali by testing fertilizer use and productivity differentials, while introducing soil nutrient measurements as indicators of land quality. In contrast with previous studies, we find little evidence that intrahousehold allocation of fertilizer is inefficient. Gender and generation gaps in productivity persist but lessen as we control for land quality. Findings suggest that women’s fields may be less fertile but may also reflect distinctive objectives and modes of production.

Though the intrinsic value to society of plant genetic resources conserved in genebanks may be recognized, assigning a cardinal value to them remains elusive. This chapter summarises the main messages from applied economics literature on genebank values that began in the late 1990s, a recent set of studies undertaken by the CGIAR Genebank Platform and Crop Diversity Trust, and assessments of national genebanks. Three points are salient: the value of information; the demand for a diversity of approaches to document the diversity of ways that genebanks benefit society; and the need to establish priorities for collecting and conservation based on cost-effectiveness. Cost-effectiveness will require a) carefully targeted investments in characterization, evaluation, and genotyping, along with management of the resulting data, and its use to develop packages of breeder- and researcher-oriented materials, and b) investment in supportive research and various organizational optimization procedures, including automation.

COVID-19 brings new challenges worldwide, including to smallholder farmers and their seed systems. In response, an escalating number of seed projects are being planned to deliver immediate aid or to alter current seed production programs. A Statement, prepared by diverse seed system experts, aims to steer both the immediate aid (next 1–2 seasons) and more developmental planning (next 1–3 years). The Statement includes 10 short-term and 4 medium-term recommendations, placing emphasis on all seed systems smallholders use: formal, informal, and integrated. It also looks beyond seed per se to the direct information and digital systems that shape remote assessments, data sharing and inclusive feedback. The Statement is prefaced by an introduction that helps contextualize the recommendations, reviews the history of humanitarian seed aid and summarizes the varied response forms that have unfolded over the last three decades.

This paper investigates the effects of crop biodiversity on farm income and production risk using a large panel dataset of rural households in Kenya. We consider three different metrics of in situ (on-farm) crop diversification (richness, evenness and concentration). We apply a partial moments-based model to test the effects of each strategy on welfare defined as expected crop income, variability (variance) and downside risk (skewness). Our comprehensive econometric approach differentiates climatic shocks, weather and climate change. The results suggest that the benefits from greater diversification in terms of enhanced land productivity and lower production costs could surpass the foregone benefit from greater efficiency associated with more concentrated production systems. Crop richness and evenness each reduce exposure to crop income risk, especially for more vulnerable farmers who produce below the expected revenue threshold. Farmers who rely on greater crop specialization, on the contrary, are more exposed to crop income risk.

This article examines the structure of the Malian fertiliser value chain and its performance in the context of the national subsidy programme, drawing on a review of the literature, farm household ...

Over a decade ago, the Malian government launched a fertilizer subsidy program to expand fertilizer use, boost productivity, and ultimately, improve food and nutrition security. The program specifically targets key crops in the socio-economic development of Mali: rice, cotton, maize, millet, and sorghum. All farmers of target crops are eligible to obtain subsidized fertilizer at a quantity proportional to the number of hectares they expect to plant to those crops. Subsidy rates differ by crop. We hypothesize that the fertilizer subsidy in Mali changes the agricultural landscape by distorting the incentives to allocate land both among target crops and between target and non-target crops, with unintended consequences for crop diversification. We apply two econometric strategies to a farm household dataset collected in 2017/18 in the most productive agricultural zones of Mali and test the effects of the fertilizer subsidy program on indicators of crop species diversity. Findings from propensity score analysis and control function approaches reveal that the fertilizer subsidy program incites households to allocate more of their land to target crops, resulting in a greater concentration of area in target crops and reduced evenness of the area distribution among them. These findings raise concerns about how best to achieve food and nutrition security, when a costly program such as this favors a non-food crop (cotton) and starchy staples over other nutrient-dense or high value crops. The environmental sustainability of a program that reduces crop species diversity in an agricultural landscape is also questionable.

Purpose Scientists in Pakistan are currently developing biofortified wheat varieties to address widespread zinc deficiency, especially among women and children in poorer rural households. The purpose of this paper is to understand how the productivity and efficiency of small-scale and marginal wheat farmers can be improved so that their households may benefit from zinc-fortified varieties. Design/methodology/approach The authors estimate a stochastic frontier production function model with data from a survey of wheat farmers conducted in Punjab, Pakistan in 2011. Findings The productivities of the newer varieties of wheat were significantly greater than the older varieties, as expected. Farmers growing wheat in the rice-wheat and cotton-wheat zones tend to be more efficient than farmers from the mixed zone. Farmers who wait to adopt a leading variety are not less efficient than earlier adopters, but the longer the time until they switch varieties again, the more inefficient is their wheat production. Older farmers tend to be more technically inefficient than younger farmers, but the effect of education is not statistically significant. Wheat farmers with access to extension advice are more efficient. Farmers whose land suffered from severe salinity or severe toxicity are less productive and less efficient than others. Research limitations/implications The authors find no differences in technical inefficiency effects associated with growing the four most popular varieties, either grown alone or with other varieties – suggesting that no single leading variety should be targeted for biofortification. In contrast to some earlier studies, the authors find that small-scale farmers tend to be less technically efficient. This result underscores the need to specifically target this group in promotional programs, and also to complement these with reinforcement of agronomic recommendations. Originality/value This project is part of the HarvestPlus program to determine the appropriate variety or varieties to biofortify with zinc so that Pakistan’s population can have better health and well-being. Further, the results show that there it is desirable to undertake further studies to improve the productivity and efficiency of wheat farmers in the Punjab, Pakistan to increase the health and well-being of the population in general.

This paper examines the origins and impact of rapid recent growth of herbicide use in Mali. Primary data come from interviews with herbicide importers and distributors and from a 2014/2015 survey of farm households in Mali’s Sudanian Savanna zone. Results suggest that a series of major supply-side changes are driving growth in Mali’s herbicide markets, most conspicuously a proliferation in the number of sellers and herbicide brands marketed, a shift to low-cost suppliers in China and India, and consequently falling herbicide prices. At the farm level, herbicides cost on average 50 per cent less than hiring weeding labor. Despite low econometric estimates of damage abatement, herbicide adoption rates reach 25 per cent in remote rural zones and 75 per cent in more accessible rural areas. Key factors affecting adoption include spatial variation in herbicide prices and rural wage rates. At current levels, herbicide use reduces peak season rural labor demand by roughly 14 per cent.

Although it is commonly accepted that farmers&rsquo, participation in the process of technology development can improve adoption rates, few studies have tested this relationship. We tested the role of farmers&rsquo, participation in the decision to adopt new sorghum varieties in the Sudan Savanna of Mali. We applied a conditional mixed-process method to data collected from 496 households in 58 villages the national agricultural research program (Institut d&rsquo, Economie Rurale) and International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) worked through farmer organizations to test varieties in farmer-managed trials and implement seed production activities. We found that the intensity of participation positively affects adoption rates on household plots. Intensity of participation was measured as the ratio of participants in the household to the total number of participants in the village. Several plot manager and household characteristics influence adoption, including education and proximity of the plot manager with head of household, household assets, and labor availability. This study draws attention to the importance of farmers&rsquo, participation as a sustainable practice that can stimulate the adoption of new technology and, in doing so, enhance food security. Future research should explore the intrahousehold dynamics of farm input adoption, and the role of different forms of participation in the innovation process.

A Correction to this paper has been published: https://doi.org/10.1007/s12571-021-01144-0

A Correction to this paper has been published: 10.1007/s12571-020-01135-7

This essay draws on the extensive empirical literature to address the question: Can genetically modified (GM) crops help poor people? The evidence suggests that GM crops can generate sizeable yield advantages for small-scale farming families in low-income countries through avoiding losses to pests and disease. These advantages may improve considerably the welfare of people who depend on farming for most of their income. However, since poverty is a complex phenomenon and improved seed in and of itself plays a limited role in rural transformation, much more is needed to generate an impact on poverty, including investments in the architecture of rural institutions and farmer knowledge.

Bt cotton remains one of the most widely grown biotech crops among smallholder farmers in lower income countries, and numerous studies attest to its advantages. However, the effectiveness of Bt toxin, which depends on many technical constraints, is heterogeneous. In Pakistan, the diffusion of Bt cotton occurred despite a weak regulatory system and without seed quality control; whether or not many varieties sold as Bt are in fact Bt is also questionable. We utilise nationally representative sample data to test the effects of Bt cotton use on productivity. Unlike previous studies, we invoke several indicators of Bt identity: variety name, official approval status, farmer belief, laboratory tests of Bt presence in plant tissue, and biophysical assays measuring Bt effectiveness. Only farmer belief affects cotton productivity in the standard production model, which does not treat Bt appropriately as damage-abating. In the damage control framework, all Bt indicators reduce damage from pests. Biophysical indicators have the largest effect and official approval has the weakest. Findings have implications for impact measurement. For policy-makers, they suggest the need, on ethical and productivity grounds, to improve variety information and monitor variety integrity closer to point of sale.

Pearl millet is one of the most important food staples of poorer populations in the drylands of India. To better understand the potential market for high-iron, pearl millet hybrids, we explored factors associated with growing pearl millet, and those that influence whether farmers grow major (popular) hybrids, as compared with minor cultivars in the State of Maharashtra. We tested the relationships among cultivar choice, seed source, and information sources. The data confirm that pearl millet is more likely to be grown by poorer households in drier, drought-prone areas. Scheduled castes are more likely to grow popular hybrids, and less likely to grow minor cultivars, but are no less likely to acquire seed from commercial vendors than less privileged people. Farmers who ascribe more importance to consumption attributes are more likely to grow minor than popular hybrids. De facto, popular pearl millet varieties are likely to reach less privileged farmers. To attain adoption potential, popular hybrids could be targeted for iron enrichment, and commercial marketing strategies should be pursued with diversified public and private sector partnerships.

Decades after the Green Revolution, sustaining wheat productivity remains an important policy goal for the government of Pakistan. Understanding the speed of diffusion of new wheat varieties can contribute to this goal. We apply duration analysis to identify the factors that shorten the time until a farmer replaces one modern variety by another, and test hypotheses concerning two recurring themes of the Green Revolution: farm size differences and the role of information sources in seed diffusion. We find that time to adoption averages only 4 years, but is shorter on larger farms. Factors that speed variety change also differ by farm size. Extension and media sources of information significantly influence adoption among larger farmers relative to information gained through social relationships, but this is not the case for marginal farmers. Traits related to consumption quality speed adoption on smaller wheat farms, where families both sell and consume their wheat; higher yields drive adoption for the most subsistence-oriented, marginal group.

The relationship between off-farm work and farm input use in Sub-Saharan Africa has been documented, although results are mixed concerning the direction of effect. Here, we explore the robustness of this linkage by applying a range of econometric models to panel data collected in Kenya, using maize as an example because of its importance as a major food crop among smallholder farmers. We test the relationship between rates of fertilizer use and three types of off-farm earnings (labour on other farms, known as farm kibarua); income from self-employment and informal businesses and earnings from regular employment (salaries, pensions or wages). Consistent with previous research, we find a strong, negative linkage between non-farm work and rates of fertiliser use in maize production, indicating trade-offs in labour allocation and farm investments. However, the relationship between fertiliser use in maize production and earnings from farm kibarua appears to be positive, illustrating the role this type of work can play in easing cash constraints for destitute households. Adding to previous research, model comparisons illustrate the sensitivity of some estimated parameters to modelling assumptions. Further, the application of the general propensity score matching demonstrates that the magnitude of the marginal effects of non-farm income on fertiliser use rates varies as income changes. In the case of non-farm earnings, the response of fertiliser to additional income is negative at lower income levels, but positive at higher levels.

Highlights • Intrahousehold bargaining affects the adoption of fertilizer on farms in West Africa. • Overall fertilizer use rates are low for cereals but less so for maize in Burkina Faso. • Family members share agricultural inputs, including fertilizer. • Bargaining does not achieve efficient fertilizer allocations. • Inclusive policy should consider who within the household has access to inputs., In most West African countries, agricultural production is a complex process that involves multiple household members managing land and sharing agricultural inputs. We develop an intrahousehold decision-making model to illustrate how technology adoption can influence bargaining processes on farms in harsh agricultural environments of West Africa, where staple food production by extended families is organized collectively under the leadership of a senior head. The head, who assumes primary responsibility for household food security, also allocates fields to members who manage production individually. Drawing on this and the intrinsic complementarity of labor and fertilizer as divisible inputs, we test the nature of the linkage between fertilizer use on collective and individual plots by applying bivariate probit and tobit models to nationally-representative, panel data from Burkina Faso. We find evidence of input sharing, though bargaining is inadequate to sustain efficient allocation of fertilizer. Plot manager characteristics that influence bargaining power, such as literacy, gender, age, contact with extension, and membership in farmer organizations differ between collectively- and individually-managed plots—confirming the differential status of household members in technology adoption. Agroforestry practices are strongly and positively associated with fertilizer use, regardless of plot manage type. Programs aimed at increasing use of modern agricultural inputs should consider impacts on bargaining positions within the household. Providing inputs to women and young men will increase their influence on other decisions, which may lead to greater equity within the household. It may also enhance efficiency in production, since currently, inputs are not allocated efficiently within the household.

This chapter distinguishes the effects of climatic shocks (droughts), weather (during one year) and climate normals (long-term average weather conditions) on Kenyan smallholder farmers' decisions to intensify maize production, measured as the share of maize area per farm allocated to hybrid seeds. We also ask how such intensification affects the vulnerability of expected crop income, crop income variability and downside risk. We find that maize intensification is strongly affected by weather, climate shocks and climate normals. We also find that maize intensification has a positive effect on expected crop income but no significant effect on crop income variability or downside risk. Moreover, relying on a higher proportion of hybrid seed use, which is negatively associated with persistent climatic shocks, is not enough to statistically significantly reduce the likelihood that crop income falls below a given threshold (downside risk). Importantly, cropping system decisions are related to longer-term investment choices, while decisions on specific hybrid types are annual decisions. Thus, maize intensification alone is not an effective strategy. Further, our results suggest that farmers are not adapting optimally to climate change. Suboptimal choices might reflect market failures, such as credit constraints, poor access to input and output markets, and information asymmetries. Our results also suggest that rising population density provides incentives to shift toward more intensive farming systems. Finally, we find trade-offs between nonfarm employment and crop income. Our findings lead us to recommend that the government of Kenya play an active role in encouraging smallholder adaptation to changing climate patterns and climate shocks. Smallholders need better access not only to hybrid seeds and other inputs through decentralized, competitive markets but also to effective, widely diffused market information services and other insurance mechanisms.

Maize dominates as a staple food in Zambia, where the government has for many years promoted hybrid seed use in order to enhance the food self-sufficiency of poor rural families. Despite the policy importance of household nutrition in Zambia, we are not aware of any recent analyses that have related the use of hybrid seed to diets among smallholder maize growers. Previous research has demonstrated a linkage between indices of dietary diversity and healthy diets among women and children. We estimate two-stage, instrumental variables, Poisson, and ordered logit regression models to test the association between hybrid seed use and four indicators of dietary diversity: food group diversity (24-h), vitamin A diversity (7-day), food frequency (7-day), and frequency of consuming foods fortified with vitamin A (7-day). Results are robust to econometric method and indicator: women interviewed in maize-growing households that plant hybrid seed have more diverse diets.

Research has demonstrated that commercializing smallholder agricultural production is one of the effective ways to boost farmer incomes, employ labor, and stimulate rural economies in Sub-Saharan Africa, but this differs by commodity. We use panel data covering over a decade to estimate output supply functions for smallholder farmers in Kenya, and compare these among three commodities with distinctive product attributes: maize, kale and milk. We find that despite improved market access over the decade, there is little discernible growth in market participation except in the case of milk. A minority of households consistently sell from year to year and market concentration remains high across all the commodities, indicating that production is largely subsistence. Nevertheless, there is greater market orientation and less market concentration in kale and milk than in maize. For all the commodities, market participation is strongly associated with access to land, productive assets, technology use, expected prices and rainfall amount and reliability. We argue that broad-based smallholder market participation can only be realized through interventions that raise smallholder production of marketable surpluses through raising productivity, and this cuts across even the high value sub-sectors such as horticulture and dairy. Also essential alongside such interventions are strategies to improving market access by reducing transaction costs.

We derive input demand functions for fertiliser and hybrid seed, testing for the combined and separate effects of income from non-farm sources and agricultural wage labour among smallholder maize farmers in Kenya. More income from off-farm sources, and specifically non-farm sources, competes with maize intensification, particularly in more productive areas where use rates are higher. In less productive areas, where households rely more on off-farm income and input use in maize is extremely low, agricultural wage labour reduces the likelihood that fertiliser is applied, but when used, has a positive effect on quantities purchased of both seed and fertiliser.

Soil amendments, application of inorganic fertilizers and erosion control are three practices recommended for use by smallholder farmers in Africa south of the Sahara, but adoption rates remain low. We grouped farmers according to their adoption of these three practices and applied a seemingly unrelated, multivariate probit model to address several correlated outcomes jointly and interdependence among factors that influence their adoption. We then estimated demand for the most common soil nutrient deficit, nitrogen (N). Data were collected from a statistical sample of 1,001 households in western and central Kenya. Results confirmed that decisions to use different categories of soil fertility management were highly correlated. Unsurprisingly, farmers were price-responsive and improved access to market services enhanced demand for both inorganic fertilizers and soil amendments. To encourage widespread adoption of soil fertility management practices, policies should promote knowledge of them, continue to enhance smallholder access to market services, encourage the development of land rental markets in rural areas, and target women-headed households and young entrants into maize production.

Zambia’s maize seed industry is currently one of the strongest and most competitive in Sub-Saharan Africa. This paper describes the changing structure of the maize seed industry and seed supply chain in Zambia. The aim of the paper is to propose elements of a marketing strategy for seed production and delivery of recently released, provitamin A-rich, orange maize varieties. Information sources include a thorough review of the literature, a statistical survey of farmers in the major maize-producing areas of the country, and key informant interviews conducted with seed company representatives. We discuss the merits of two strategies: (1) liberalizing the provision of original orange maize planting material to all seed companies with the aim of maximizing the impact of this public health intervention, and (2) exclusive rights granted to companies with the goals of preserving differentiated products and ensuring standard seed quality to protect the brand. We find that, exclusive or not, risk-sharing contracts with any company that takes up this product, as well as building and maintaining a unique brand for orange maize would be essential for the success of this product. [EconLit Classifications: Q130, Q160, Q180]. C 2014 Wiley

The development and diffusion of hybrid maize in Zambia since the 1970s is a major achievement in African agriculture, but other than profitability studies, analyses of how this process has affecte...

This paper explores the impacts of hybrid maize adoption on the welfare of farming households in Kenya. We use a four-year panel dataset to estimate the effects of hybrid seed use on four indicators of household welfare, namely, income, assets, inequality and poverty. Results show that use of hybrid seed not only contributes to higher annual income, but also to raising the value of assets, possibly reflecting longer-term welfare effects. Further, we find that use of hybrid seed reduces the depth of poverty, and that the amount planted reduces inequality. As expected, impacts differ between major and minor maize-growing areas of the country. Maize farmers who do not use hybrid seed are clearly disadvantaged. This calls for continued public and private investments in the infrastructure and policy process that supports a competitive, liberalized seed industry and improved access of smallholder farmers to well-adapted, affordable hybrids.

We add to an emerging body of literature on input subsidies in Africa south of the Sahara. Our analysis focuses on demand for seed, characterising smallholders with a high predicted demand for hybrid seed who were not reached by the subsidy programme. We use cross-sectional data from the 2010 agricultural season and an instrumented control function approach to test the hypothesis that the subsidy on hybrid maize seed in Zambia is selectively biased. Consistent with other literature, we find that the subsidy is a recursive determinant of seed demand, but in 2010, its recipients had more land, more assets, and lower poverty rates. Findings illustrate the social costs of the programme as currently designed and highlight the need to build alternative supply channels if poorer maize growers are to grow hybrid seed.

Kenya is a globally recognized maize “success story.” As the overall percentage of maize farmers growing hybrids tops 80% and the seed industry matures, the slow pace of hybrid replacement on farms, and the continued dominance of the seed industry by Kenya Seed Company, may dampen productivity. Our econometric analysis identifies the factors that explain farmer demand for hybrid seed, and the age of hybrids they grow, considering hybrid seed ownership. Male-headed households with more education, more assets, and more land plant more hybrid seed. Scale of seed demand per farm is differentiated by agroecology. We find a strong farmer response to the seed-to-grain price ratio, which we interpret as evidence of a commercial orientation even on household farms. However, despite the dramatic increase in the number of hybrids sold and the breadth of seed suppliers as seed markets liberalize, an older hybrid still dominates national demand.

Although farmers in the Malian Sahel depend on millet for survival, demand and supply constraints have impeded their use of certified seed. We use data collected from households, vendors and seed samples to test the way market purchases of grain and seed affect household food consumption and millet genetic diversity. Purchase of millet grain in markets contributes to food security, but reduces dietary diversity – suggesting that scarce cash was directed toward meeting staple food needs first. Farmers purchased millet grain for seed only in the site with riskier rainfall and smaller market fairs. Although they were more likely to purchase in markets where the genetic dissimilarity of seed was higher, purchasing seed in markets was negatively associated with on-farm diversity. Seed shortage rather than variety experimentation appears to be the motivation for seed purchase. Introducing certified seed in rural markets through small-scale traders will require the provision of market services and promotional efforts.