Trend and stability analyses of millet yields treated with fertilizer and crop residues in the Sahel

Yamoah, C.F. and Bationo, A. and Shapiro, B. and Koala, S. (2002) Trend and stability analyses of millet yields treated with fertilizer and crop residues in the Sahel. Field Crops Research, 75 (1). pp. 53-62.

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Pearl millet (Penisetum glaucum (L.) R.Br.) is a major food crop grown on impoverished sandy soils in the Sahel. A 9-year long-term study was undertaken in the Sahel to test the hypothesis that integrated use of millet crop residues retained on farm fields after harvest and mineral fertilizers results in greater and more sustainable yields and conserve soil fertility better than either the use of residue or fertilizer alone. The four treatments compared were: (1) control (crop residue removed and no fertilizer applied), (2) crop residue alone, (3) 30 kg N+13 kg P ha-1 (fertilizer) alone and (4) crop residue+fertilizer. Use of crop residue+fertilizer increased grain yield fourfold over the control; use of fertilizer doubled millet yield relative to the control and crop residues resulted in 1.2 times more yield than the control. Crop residues significantly improved nutrient-use efficiency of the applied fertilizer. Sustainability yield index (SYI), a measure of an upward trend in yield over time, was greatest in crop residue+fertilizer plots as are soil organic carbon, available P and pH. Stability analysis indicated that crop residue+fertilizer treatment gave in greater yields and returns over fertilizer cost in the various seasons than either crop residue or fertilizer

Item Type: Article
Author Affiliation: International Crop Research Institute for the Semiarid Tropics (ICRISAT), Niamey, Niger
Subjects: Plant Production
Plant Protection > Pesticides
Crop Improvement
Divisions: Millet
Depositing User: Mr B Krishnamurthy
Date Deposited: 14 Jun 2011 05:58
Last Modified: 14 Jun 2011 05:58
Official URL:

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