African Journal of Agriculture

African Journal of Agriculture ISSN 2375-1134 Vol. 3 (10), pp. 234-246, November, 2016. © International Scholars Journals

Full Length Research Paper

Effects of crop rotation and the restitution of dry crop residues on pearl millet yield in mono-cropping system

Daouda Hama Rafini1*, Ibrahim Seyni Doiri2, Mahamadou brigi Wanke3 and Hamani Ali Tandjan1

1ICRISAT Niamey, BP12404, Niamey, Niger.

2Ecole Normale Supérieure, University Adbou Moumouni, Niamey, Niger.

3University Adbou Moumouni, Niamey, Niger. 


Accepted 28 October, 2016


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.

Key words: Millet, legume, cropping system, soil fertility.