s:782:"TI Inorganic soil nitrogen in relation to soil properties in smallholder maize fields in the Kenya highlands 
AU Shepherd, G. 
AU Buresh, R.J. 
AU Gregory, P.J. 
AB 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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