Kihara, J. and Nziguheba, G. and Zingore, S. and et al, . (2016) Understanding variability in crop response to fertilizer and amendments in sub-Saharan Africa. Agriculture, Ecosystems and Environment, 229 (1). pp. 1-12.
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Abstract
Improved understanding of soil fertility factors limiting crop productivity is important to develop appropriate soil and nutrient management recommendations in sub-Saharan Africa. Diagnostic trials were implemented in Kenya, Malawi, Mali, Nigeria and Tanzania, as part of the African Soils Information Service (AfSIS) project, to identify soil fertility constraints to crop production across various cropping systems and soil fertility conditions. In each country, one to three sites of 10 km x 10 km were included with each site having 12–31 field trials. The treatments tested included a control, an NPK treatment, three treatments in which the N, P and K nutrients were omitted one at a time from the NPK treatment, and three treatments in which secondary and micronutrients (Ca, Mg, S, Zn and B) simply referred here as multi-nutrients, manure and lime were added to the NPK. The field trials were conducted for 1–2 seasons; the test crop was maize except in Mali where sorghum was used. Nitrogen was limiting in all sites and generally the most limiting nutrient except in Sidindi (Kenya) and Kontela (Mali) where P was the most limiting....
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Clustering, Nutrient omission trial, Crop responsiveness, Soil constraints, Variability |
| Author Affiliation: | International Center for Tropical Agriculture (CIAT), c/o ICIPE Duduville Complex, Off Kasarani Road, PO Box 823-00621, Nairobi, Kenya |
| Subjects: | Plant Protection |
| Divisions: | General |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 10 Feb 2017 08:38 |
| Last Modified: | 10 Feb 2017 08:38 |
| Official URL: | http://dx.doi.org/10.1016/j.agee.2016.05.012 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14754 |
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