Your search found 5 records
1 Vogel, H.; Nyagumbo, I.; Olsen, K. 1994. Effect of tied riding and mulch ripping on water conservation in maize production on sandveld soils. Der Tropenlandwirt, Zeitschrift f?r die Landwirtschaft in den Tropen und Subtropen, 95:33-44.
(Location: IWMI-HQ Call no: P 3803 Record No: H016538)
2 Nyagumbo, I.. 2003. Conservation tillage technologies and their potential effects on groundwater recharge on red clay soil in Zimbabwe. In Beukes, D.; de Villiers, M.; Mkhize, S.; Sally, H.; van Rensburg, L. (Eds.). Proceedings of the Symposium and Workshop on Water Conservation Technologies for Sustainable Dryland Agriculture in Sub-Saharan Africa (WCT), held at Bloem Spa Lodge and Conference Centre, Bloemfontein, South Africa, 8-11 April 2003. Pretoria, South Africa: ARC-Institute for Soil, Climate and Water. pp.142-152.
Groundwater ; Recharge ; Conservation tillage ; Red soils ; Clay soils ; Water budget ; Evapotranspiration ; Drainage ; Runoff ; Models / Zimbabwe
(Location: IWMI-HQ Call no: IWMI 631.7.1 G100 BEU Record No: H034398)
3 Nyagumbo, I.; Nyamadzawo, G.; Madembo, C. 2019. Effects of three in-field water harvesting technologies on soil water content and maize yields in a semi-arid region of Zimbabwe. Agricultural Water Management, 216:206-213. [doi: https://doi.org/10.1016/j.agwat.2019.02.023]
Water harvesting ; Technology ; Soil water content ; Crop yield ; Maize ; Semiarid zones ; Dry farming ; Water conservation ; Drought ; Rain ; Soil moisture ; Slope / Zimbabwe / Shurugwi / Mukandabvute / Takara / Kuchicha
(Location: IWMI HQ Call no: e-copy only Record No: H049202)
(0.54 MB)
Climate change and recurring mid-season dry spells have resulted in perennial droughts and poor yields in most smallholder farming areas located in marginal arid to semi-arid lands (ASAL) of Zimbabwe where they are dependent on rainwater for agricultural crop production. One approach that can be used to adapt to changing climatic pattern is in-field water harvesting. This study evaluated the soil profile water content and maize yields of 3 infield water harvesting technologies namely infiltration pits (IF), fanya juus (FJ) and contour ridges with cross ties (CRCT) in comparison to standard contour ridges (SC). The three systems are currently the focus of extension recommendations for water conservation in semi-arid regions of the country. Soil water content was measured on a regular basis using gravimetric methods at locations upslope and down slope of each structure. The average volumetric water content was signifcantly different between treatments, and it varied with increasing distance from the water harvesting structures. The average profile soil moisture content, over the three seasons were 8.3, 8.2, 8.1 and 7.8% for CRCT, FJ, IF and SC repectively. CRCT, FJ and IF retained more water for a greater distance from the harvesting structures compared to the SC. Maize yields were significantly higher in the water harvesting technologies compared to SC. Maize yields were 1196, 1164, 1250 and 749 kg ha-1 for CRCT, FJ, IF and SC respectively. There as a good correlation between water content and maize yields (R2 = 0.80). It was concluded that improved water harvesting structures when compared to SC have the potential to increase maize yields in areas with water shortages, hence they can be a useful strategy for climate change adaptation.
4 Mutenje, M. J.; Farnworth, C. R.; Stirling, C.; Thierfelder, C.; Mupangwa, W.; Nyagumbo, I.. 2019. A cost-benefit analysis of climate-smart agriculture options in Southern Africa: balancing gender and technology. Ecological Economics, 163:126-137. [doi: https://doi.org/10.1016/j.ecolecon.2019.05.013]
Climate-smart agriculture ; Cost benefit analysis ; Gender ; Women's participation ; Households ; Decision making ; Technology transfer ; Climate change adaptation ; Conservation agriculture ; Smallholders ; Farmers ; Agroecological zones ; Models / Southern Africa / Malawi / Mozambique / Zambia
(Location: IWMI HQ Call no: e-copy only Record No: H049486)
(0.72 MB)
Climate change and extreme weather events undermine smallholder household food and income security in southern Africa. Climate Smart Agriculture (CSA) technologies comprise a suite of interventions that aim to sustainably increase productivity whilst helping farmers adapt their farming systems to climate change and to manage risk more effectively. Cost-benefit analysis (CBA) and a mixed methods approach were used to assess the likelihood of investment in various CSA technology combinations. The data were drawn respectively from 1440, 696, and 1448 sample households in Malawi, Mozambique and Zambia, covering 3622, 2106 and 5212 maize-legume plots in these countries over two years. The cost-benefit analysis and stochastic dominance results showed that CSA options that combined soil and water conservation management practices based on the principles of conservation agriculture (CA), improved varieties, and associations of cereal-legume crop species were economically viable and worth implementing for risk averse smallholder farmers. A dynamic mixed multinomial logit demonstrated that women's bargaining power, drought shock, and access to CSA technology information positively influenced the probability of investing in CSA technology combinations. This study provides evidence of the importance of cultural context, social relevance and intra-household decision-making in tailoring suitable combinations of CSA for smallholder farmers in southern Africa.
5 Simutowe, E.; Ngoma, H.; Manyanga, M.; Silva, J. V.; Baudron, F.; Nyagumbo, I.; Kalala, K.; Habeenzu, M.; Thierfelder, C. 2024. Risk aversion, impatience, and adoption of conservation agriculture practices among smallholders in Zambia. Heliyon, 10(4):e26460. [doi: https://doi.org/10.1016/j.heliyon.2024.e26460]
Conservation agriculture ; Risk ; Households ; Smallholders ; Farmers ; Agricultural practices ; Rainfall ; Agricultural technology ; Farm income / Zambia
(Location: IWMI HQ Call no: e-copy only Record No: H052784)
https://www.sciencedirect.com/science/article/pii/S2405844024024915/pdfft?md5=819d1bd5381474e333be7114d9cb22da&pid=1-s2.0-S2405844024024915-main.pdf
https://vlibrary.iwmi.org/pdf/H052784.pdf
https://vlibrary.iwmi.org/pdf/H052784.pdf
(2.11 MB) (2.11 MB)
Sustainable agricultural practices such as conservation agriculture have been promoted in southern Africa for nearly three decades, but their adoption remains low. It is of policy interest to unpack behavioural drivers of adoption to understand why adoption remains lower than anticipated. This paper assesses the effects of risk aversion and impatience on the extent and intensity of the adoption of conservation agriculture using panel data collected from 646 households in 2021 and 2022 in Zambia. We find that 12% and 18% of the smallholders were impatient and risk averse, respectively. There are two main empirical findings based on panel data Probit and Tobit models. First, on the extensive margin, being impatient is correlated with a decreased likelihood of adopting combined minimum-tillage (MT) and rotation by 2.9 percentage points and being risk averse is associated with a decreased propensity of adopting combined minimum tillage (MT) and mulching by 3.2 percentage points. Being risk averse is correlated with a decreased chance of adopting basins by 2.8 percentage points. Second, on the intensive margin, impatience and risk aversion are significantly correlated with reduced adoption intensity of basins, ripping, minimum tillage (MT), and combined MT and rotation by 0.02–0.22 ha. These findings imply a need to embed risk management (e.g., through crop yield insurance) in the scaling of sustainable agricultural practices to incentivise adoption. This can help to nudge initial adoption and to protect farmers from yield penalties that are common in experimentation stages.
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