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Cereal yield response to conservation agriculture practices in drylands of West Africa: A quantitative synthesis

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Title Cereal yield response to conservation agriculture practices in drylands of West Africa: A quantitative synthesis
 
Creator Bayala, Jules
 
Contributor Sileshi, Gudeta W.
Coe, Richard
Kalinganire, Antoine
Tchoundjeu, Zacharie
Sinclair, Thomas R.
Garrity, Dennis
 
Subject coppicing trees
mean difference in yield
parklands
soil and water conservation
 
Description To address the decline in crop productivity in the drylands ofWest Africa, many initiatives have focused on
combating soil degradation. Various practices including (1) parkland trees associated with crops, (2)
coppicing trees, (3) green manure, (4) mulching, (5) crop rotation and intercropping, and (6) traditional
soil/water conservation have been tested. The present study attempts to provide a comprehensive,
quantitative synthesis of existing reports on the effect of conservation agriculture (CA) practices on crop
yield response in Burkina Faso, Mali, Niger and Senegal. Out of a total of 155 reports found, 63 fulfilled all
the appropriate criteria to be included in the meta-analysis of the effect of various conservation agriculture
practices on the yield response of maize, millet and sorghum. The study revealed significant variability in
cereal yield response (and hence risk) with all the practices examined. Despite the variability, the mean
effects of the six CA practices on crop yield were more positive than negative except with parkland trees.
However, for this last practice, species like Faidherbia albida exerts more positive impact on crop yield.
Yield increases relative to the control were higher with green manure and mulching than with coppicing
trees and parklands. Increases in yield in the six CA practices were higher on low to medium productivity
sites for maize, millet and sorghum. Coppicing trees and rotations improved yields when the rainfall is
>800mmwhereas the opposite happens with parkland and soilewater conservation measures. Mulching
performed better when the rainfall is
 
Date 2012-11-30
2017-01-05T19:39:23Z
2017-01-05T19:39:23Z
 
Type Journal Article
 
Identifier https://mel.cgiar.org/reporting/download/hash/uk45nClg
Jules Bayala, Gudeta W. Sileshi, Richard Coe, Antoine Kalinganire, Zacharie Tchoundjeu, Thomas R. Sinclair, Dennis Garrity. (30/11/2012). Cereal yield response to conservation agriculture practices in drylands of West Africa: A quantitative synthesis. Journal of Arid Environments, 78, pp. 13-25.
https://hdl.handle.net/20.500.11766/5159
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Elsevier
 
Source Journal of Arid Environments;78,(2012) Pagination 13,25