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309 results on '"Mafongoya, Paramu"'

52. List of Contributors

Author

Alamu, Emanuel O., primary, Chabala, Lydia M., additional, Chibwe, Terence, additional, Chigeza, Godfrey, additional, Chikoye, David, additional, Chiona, Martin, additional, Crespo, Olivier, additional, Descheemaeker, Katrien, additional, Ellis-Jones, Jim, additional, Gondwe, Therese, additional, Homann Kee-Tui, Sabine, additional, Jiri, Obert, additional, Kayeke, Mohamed J., additional, Kintche, Kokou, additional, Kuntashula, Elias, additional, Lungu, Olipa N., additional, Mafongoya, Paramu L., additional, Mahuku, George, additional, Masikati, Patricia, additional, Mooya, Ackson, additional, Murungweni, Chrispen, additional, Nhamo, Nhamo, additional, Ntawuruhunga, Pheneas, additional, Omondi, John O., additional, Peerbhay, Kabir, additional, Phiri, Alexander, additional, Senda, Trinity, additional, Sisito, Gevious, additional, and Tada, Obert, additional

Published
2017
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73. The challenges experienced by small-scale fishing communities of Lake Kariba, Zimbabwe

Author

Muringai, Rodney T., Naidoo, Denver, Mafongoya, Paramu, Muringai, Rodney T., Naidoo, Denver, and Mafongoya, Paramu

Abstract

Small-scale fisheries play a significant role in enhancing livelihoods, creating employment and contributing to food security especially in developing countries. Rural fishing communities are highly dependent on natural resources, which are climate sensitive. Many research efforts have been made to understand the impacts of climate change on fisheries and fishing economies. However, little attention has been given to understand the challenges experienced by small-scale fishing communities in developing countries in Africa. This article assesses non-climate change and climate change-induced challenges according to the experiences of the gillnet small-scale fishers of Sanyathi fishing basin of Lake Kariba, Zimbabwe. The study used a qualitative research design, and data were collected using semi-structured in-depth interviews with fishers. Thematic content analysis was used to analyse interview transcripts. The study results showed that declining fish catches is one of the major challenges experienced by fishers. The main themes that emanated as the challenges faced by fishers are food insecurity, wildlife attacks, lack of access to information systems, lack of fishing equipment, the existence of the predator crayfish, poor lake co-management and shrinking fishing boundaries. Overall, the study found that fish production is negatively affected by several political, economic and environmental factors; therefore, development through the public and private organisations should incorporate small-scale fishers in policy formulation to positively enhance livelihoods and food security.

Published
2020

77. Detecting and mapping drought severity using multi-temporal Landsat data in the uMsinga region of KwaZulu-Natal, South Africa.

Author

Lottering, Shenelle, Mafongoya, Paramu, and Lottering, Romano

Subjects
*DROUGHT management, *LANDSAT satellites, *DROUGHTS, *CLIMATE change
Abstract

Drought has become a more frequent phenomenon under changing climatic conditions, particularly in Sub Saharan Africa. This study tested the utility of a newly proposed Temperature-Vegetation Water Stress Index (T-VWSI) in detecting drought severity using Landsat data for the years 2008, 2012, 2016 and 2018. This index was created using both NDVI and LST to detect drought severity within the region. The results show that the year 2016 experienced the most severe levels of drought, with the northern areas of the uMsinga region being most severely affected. SPI was used to corroborate the findings of the T-VWSI index and also established that the year 2016 was the year of severe drought in uMsinga. The results of this study have illustrated the potential of the T-VWSI index in effectively mapping and detecting drought over large spatial areas. [ABSTRACT FROM AUTHOR]

Published
2022
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95. Drought and its impacts on small-scale farmers in sub-Saharan Africa: a review.

Author

Lottering, Shenelle, Mafongoya, Paramu, and Lottering, Romano

Subjects
*DROUGHT management, *DROUGHTS, *WEB search engines, *NATURAL disasters, *ANIMAL mortality, *FARMERS, *REMOTE sensing
Abstract

Drought frequency is expected to increase in the coming decades due to climate change. Droughts are one of the most devastating natural disasters affecting food production, water resources and causing widespread human and animal mortalities. Sub-Saharan Africa is considered the most vulnerable region to climate change, due to low rainfall, long dry seasons and high levels of poverty. A systematic approach was used to search for published literature from 2008 to 2018 on the impacts of droughts on small-scale farmers in Sub-Saharan Africa from Ebscohost, Google Scholar and Web of Science internet search engines. To acquire relevant studies, the following keywords and Boolean operation combinations were used: GIS AND Remote Sensing OR drought OR small-scale farmers OR sub-Saharan Africa and only studies from 2008 to 2018 were selected. The impacts of droughts are far-reaching and affect the environment, societies and the economy of a country. There is limited reliable and comprehensive information on the impacts of droughts, which calls for research aimed at explaining the impacts of effect and how they can be predicted and mitigated. Improving drought preparedness and mitigation is an important precondition reducing the vulnerability of small-scale farmers and rural communities to the impacts of droughts. [ABSTRACT FROM AUTHOR]

Published
2021
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96. Velvet Bean and Cowpea Residual Effects on Maize Crop in Smallholder Farming Areas of Zimbabwe

Author

Jiri, Obert and Mafongoya, Paramu L.

Subjects
livestock-cropping systems, residual effect, soil fertility, food and beverages, International Development, yield, Crop Production/Industries, Mucuna pruriens, Vigna unguiculata
Abstract

On-farm research was conducted in Dendenyore Communal Land and Zana Resettlement areas of Hwedza District, Zimbabwe from 1999 to 2001. The objective of the study was to evaluate the effects of velvet bean and cowpea on growth and yield of maize in legume-maize rotation system. A total of 14 treatments, which consisted of forage legume and maize crops were examined. The experiment was established in a randomized complete block design with 9 replicates. On-farm sites were the replicates. The results show a significant residual effect of velvet bean and cowpea, when grown with single super phosphate fertiliser, on the maize stover and grain yield. They indicate significant phosphorus residual effects on a subsequent maize crop on sandy soils. Forage legumes contribute to residual soil fertility in fallen leaves and roots that increases yield of subsequent crops. The results also reveal that biomass production in perennial leys, grazed during the dry season, would be greater in the second season than in the establishment year. The results also indicate that in the velvet bean systems, especially green manure, nitrogen is lost very early in the season. This may lead to lack of synchrony between nutrient availability and crop uptake. The maize after green manure system had a nitrogen use efficiency of about 11 kg/kg of nitrogen applied. These results show the residual potential of forage legumes in reducing nitrogen fertiliser need for subsequent maize crops in mixed livestock-cropping systems.

Published
2018
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97. Tracking the Release of Soil Nitrate and Labile C in A Legume-Maize Rotation in Zimbabwe

Author

Jiri, Obert and Mafongoya, Paramu L.

Subjects
forage legumes, leaching, carbon, food and beverages, green manures, Crop Production/Industries, nitrogen
Abstract

This study compared the effect of a weedy fallow (5.2 t/ha biomass), a velvet bean (Mucuna pruriens) cut for hay (7.2 t/ha biomass) and a green-manured M. pruriens (6.49 t/ha biomass) on the dynamics of soil N and C in a maize crop. An on-farm, farmer participatory experiment was established on a farmer’s field in Wedza District, Zimbabwe. Soil mineral N and labile carbon were determined at intervals upto 120 cm depth, at maize planting and at 1 and 2 weeks after planting. Before planting, the soil mineral N content ranged from 28 kg N/ha after weed fallow to 107 kgN/ha following M. pruriens. Total nitrate concentration was highest in the 0-15 cm depth of the M. pruriens treatments in the pre-planting sampling, but following rainfall and maize planting, nitrate concentration declined rapidly. By 2 weeks after planting, 7.5 and 13.5 kg N/ha remained in the 0-120 cm soil depth of the weedy fallow and green-manured M. pruriens, respectively. Improving synchrony of nutrient release and uptake is critical when applying high quality residues which breakdown relatively slowly. This could result in significant inputs of C, release nutrients more slowly and reduce soil nutrient losses.

Published
2018
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