Contribution of previous legumes to soil fertility and millet yields in West African Sahel
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Citation
Gaston Sangare, Dahiratou Ibrahim Doka, Moussa Barrage, Dougbedji Fatondji. (8/6/2016). Contribution of previous legumes to soil fertility and millet yields in West African Sahel. African Journal of Agricultural Research, 11 (28), pp. 2486-2498.
Abstract
Studies on combined effects of 4 legume crops residues and rock phosphate application on pearl millet
yield were undertaken on sandy acid soil field from 2012 to 2015 at ICRISAT Sahelian center (ISC)-
Sadore, Niger. The objective of the experiment was to assess the best combination of legume species x
rate of crop residue x rock phosphate doses that can sustainably improve pearl millet yield in cereal
monoculture system with a low input cost and minimum soil tillage. Over 3 years, the residual effect of
previous legume crop residue significantly improved not only the grain yield (P<0.001) and dry residue
yields (P<0.001) but also the growth parameters of pearl millet than millet mono-cropping. Treatments
with or without natural rock phosphate did not show any statistical differences on millet yield while
adding a micro dose of urea improved significantly the yield (P<0.001). The interaction effects of
preceding legume crops in rotation with millet and restitution of dry residue on the earlier mentioned
parameters across 3 years mono-cropping were studied in this experiment.