African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Contribution of previous legumes to soil fertility and millet yields in West African Sahel

Gaston Sangare
  • Gaston Sangare
  • ICRISAT Niamey, BP12404, Niamey, Niger.
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Dahiratou Ibrahim Doka
  • Dahiratou Ibrahim Doka
  • Ecole Normale Supérieure, University Adbou Moumouni, Niamey, Niger.
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Moussa Barrage
  • Moussa Barrage
  • University Adbou Moumouni, Niamey, Niger.
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Dougbedji Fatondji
  • Dougbedji Fatondji
  • ICRISAT Niamey, BP12404, Niamey, Niger.
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  •  Received: 26 April 2016
  •  Accepted: 08 June 2016
  •  Published: 14 July 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.