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Yield gap analysis for Tanzania – the impacts of climate, management, and socio-economic impacts on maize yields

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dc.contributor.author Gornott, C.
dc.contributor.author Hattermanna, F.
dc.contributor.author Wechsunga, F.
dc.date.accessioned 2016-01-11T01:21:26Z
dc.date.available 2016-01-11T01:21:26Z
dc.date.issued 2015
dc.identifier.citation Gornott, Hattermanna & Wechsunga (2015). Yield gap analysis for Tanzania – the impacts of climate, management, and socio-economic impacts on maize yields. EProcedia Environmental Sciences, 29: 231 en_GB
dc.identifier.uri http://www.taccire.sua.ac.tz/handle/123456789/489
dc.description Available at www.sciencedirect.com en_GB
dc.description.abstract Food security will be the biggest challenge for Tanzania in the next decades. Besides, Tanzania has a multifarious ecosystem, which is endangered through not adapted agronomic practices. Current innovation strategies focus mostly either on the issue of food security or on environmental damages, but rarely on both issues. However, both issues are very crucial. With crop models, a wide range of agricultural practices can be investigated to show possibilities to optimize the application of these practices. Model assessments allow to separate the effects of agronomic and climatic conditions. The process-based model SWIM (Soil and Water Integrated Model) can compute the impacts of agronomic practices and thus develop strategies to decrease the yield gap between actual (farm) yields (Ya) and potential yields (Yp). The Yp are limited through the nutrient (Yn) and water supply and reduced by pests, diseases, and weeds. Furthermore, socio-economic impacts are also relevant (knowledge, tradition, or culture). These impacts can be captured by statistical crop models. Due to regional-adapted, integrated agronomic practices, Ya can be increased and thus the yield gap between Ya and Yp can be decreased. However, enhanced yields due to sufficient nutrient supply are more sensitive on climate (higher yield volatility). In particular, for innovative farmers increase the production risk of climate change impacts. These endangered adaptation from farmers and therefore both food security and the environment. However, not all influences between Ya and Yn can be explained by agronomic (fertilizer application, harvest time, tillage, and plant protection) and climatic conditions. Additionally, the Ya are affected by a broad range of nonbiophysical, socio economic constraints. To decrease the yield gap on regional level, agricultural practices and knowledge are required, which consider regional-specific the issue of food security and environmental protection in a balanced ratio. en_GB
dc.language.iso en en_GB
dc.publisher Elsevier en_GB
dc.subject Yield gap en_GB
dc.subject Maize en_GB
dc.subject Food security en_GB
dc.subject Tanzania en_GB
dc.subject Environmental protection en_GB
dc.subject Climate change en_GB
dc.title Yield gap analysis for Tanzania – the impacts of climate, management, and socio-economic impacts on maize yields en_GB
dc.type Article en_GB


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