We investigated the influence of soil charge properties on the distribution of inorganic soil N in maize (Zea mays) fields on smallholder farms in the subhumid highlands of Kenya. There was little or no fertilizer use in these subsistence farming systems. Soil NO3 was measured to 2 m depth in maize fields on 96 farms, sampled in transects at three physiographic positions (ridgetop, midslope and lower slope) in each of six soil map units (4 or 8 transects per soil map unit) covering four parent materials: acid igneous, various igneous, basic igneous, and sedimentary. Soil NO3 concentrations varied from
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DOI:
https://doi.org/10.1016/S0016-7061(00)00092-6Altmetric score:
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Publication year
2000
Authors
Shepherd G; Buresh R J; Gregory P J
Language
English
Keywords
farming systems, agriculture, agricultural systems, mineralogy
Geographic
Kenya
