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Why is the spatial variability of millet yield high at farm level in the Sahel? Implications for research and development

OAR@ICRISAT

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Relation http://oar.icrisat.org/11233/
https://doi.org/10.1080/15324982.2019.1625984
10.1080/15324982.2019.1625984
 
Title Why is the spatial variability of millet yield high at farm level in the Sahel? Implications for research and development
 
Creator Boubou Diallo, M
Akponikpe, P B I
Abasse, T
Fatondji, D
Agbossou, E K
 
Subject Abiotic Stress
Biotic Stress
Millets
Pearl Millet
Soil
Crop Yield
African Agriculture
Sahel Region
 
Description Millet yields are highly variable even within the same farm in the Sahel. A conceptual model of the phenomenon was designed and quantitative analysis of key relationships was conducted based on the available published studies. We found that the high spatial variability of millet yield is due to two main edaphic factors: soil fertility properties and water availability. It is still unknown whether the spatial variability of the two main factors is inherent to Sahelian soils. However, some biotic and abiotic factors induce and even maintain the variability of the main factors. The biotic factors include the presence of trees, termite’s activity, fertility management practices, pests, and diseases. Abiotic factors include rainfall (amount, intensity, and distribution) and wind erosion. The major soil chemical properties which strongly influence spatial yield variability include organic carbon, pH, aluminum saturation, and available phosphorus. Millet yield was positively and strongly correlated with P (r2=0.80, p 
 
Publisher Taylor & Francis
 
Date 2019-06
 
Type Article
PeerReviewed
 
Identifier Boubou Diallo, M and Akponikpe, P B I and Abasse, T and Fatondji, D and Agbossou, E K (2019) Why is the spatial variability of millet yield high at farm level in the Sahel? Implications for research and development. Arid Land Research and Management (TSI). pp. 1-24. ISSN 1532-4982