Sustainable Intensification with Cereal-Legume Intercropping in Eastern and Southern Africa

Much research has been conducted on cereal-legume intercropping as a sustainable intensification (SI) practice in Eastern and Southern Africa (ESA). However, the role of inorganic fertilizers in sustainably intensifying intercropping systems has not been systematically analyzed. Therefore, the objec...

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Bibliographic Details
Published in:Sustainability 2019, Vol.11 (10), p.2891-2891
Main Authors: Kiwia, Abednego, Kimani, David, Harawa, Rebbie, Jama, Bashir, Sileshi, Gudeta W
Format: Article
Language:English
Subjects:
Acceptability
Agricultural practices
Agricultural production
Agriculture
Agroforestry
Cereal crops
Cereals
Climate change
Corn
Cropping systems
Crops
Emission standards
Environmental impact
Farmers
Farms
Fertilizer application
Fertilizers
Food security
Intercropping
Land degradation
Legumes
Pigeonpeas
Productivity
Soil fertility
Sorghum
Sustainability
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Summary:Much research has been conducted on cereal-legume intercropping as a sustainable intensification (SI) practice in Eastern and Southern Africa (ESA). However, the role of inorganic fertilizers in sustainably intensifying intercropping systems has not been systematically analyzed. Therefore, the objective of the present analysis was to assess the role of inorganic fertilizer use in cereal-pigeonpea ( ) intercropping in terms of SI indicators, namely, yield, production risks, input use efficiency, and economic returns. The data used for this analysis were gathered from over 900 on-farm trials across Kenya, Tanzania, and Mozambique. All SI indicators assessed showed that intercropping combined with application of small amounts of inorganic fertilizers is superior to unfertilized intercrops. Fertilizer application in the intercropping system improved cereal yields by 71-282% and pigeon pea yields by 32-449%, increased benefit-cost ratios by 10-40%, and reduced variability in cereal yields by 40-56% and pigeonpea yields by 5-52% compared with unfertilized intercrops. Improved yields and reduced variability imply lowering farmers' risk exposure and improved credit rating, which could enhance access to farm inputs. We conclude that the strategic application of small amounts of inorganic fertilizers is essential for the productivity and economic sustainability of cereal-pigeonpea intercropping under smallholder farming in ESA.
ISSN:2071-1050
2071-1050
DOI:10.3390/su11102891