Fertilizer response and nitrogen use efficiency in African smallholder maize farms
| Autor: | Stephen M. Ichami, Andrew Sila, Ellis Hoffland, Jetse J. Stoorvogel, Keith D. Shepherd |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nitrogen
Soil responsiveness Soil Science 010501 environmental sciences Silt engineering.material 01 natural sciences Spatial variability Crop Nutrient Soil pH Bodembiologie 0105 earth and related environmental sciences business.industry Soil classification 04 agricultural and veterinary sciences Soil Biology PE&RC Kenya Bodemgeografie en Landschap Meta-analysis Agronomy Agriculture 040103 agronomy & agriculture engineering Soil Geography and Landscape 0401 agriculture forestry and fisheries Environmental science Original Article Fertilizer business Agronomy and Crop Science |
| Zdroj: | Nutrient Cycling in Agroecosystems Nutrient Cycling in Agroecosystems 113 (2019) 1 Nutrient Cycling in Agroecosystems, 113(1), 1-19 |
| ISSN: | 1573-0867 1385-1314 |
| Popis: | Improving fertilizer recommendations for farmers is essential to increase food security in smallholder landscapes. Currently, blanket recommendations are provided across agro-ecological zones, although fertilizer response and nutrient use efficiency by maize crop are spatially variable. We aimed to identify factors that could help to refine fertilizer recommendation by analyzing the variability in fertilizer response (FR) and the agronomic nitrogen use efficiency (N-AE). A literature search for on-farm studies across Kenya and Sub-Sahara Africa (SSA), excluding Kenya, yielded 71 publications. The variability in FR was studied using a meta-analysis whereas key factors that influence FR and N-AE were studied with linear regression models. On average, the FR was 2, but it varied considerably from 1 to 28.5 (excluding outliers). In SSA, 18% of the plots were non-responsive plots with an FR |
| Databáze: | OpenAIRE |
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