Spatial distribution of N, P and K in major yam soils of southeastern Nigeria

Pedometrics, the application of numerical techniques to describe soil attributes and enhance objectivity in soil-related decision making, was applied to soil samples from 149 geo-referenced locations in yam growing area of southeastern Nigeria. Geostatistical technique was applied using Krigin to estimate soil parameters from unsampled sites. Results revealed multi-nutrient deficiencies of N, P, and K in the area. The magnitude of deficiency is N > K > P. Pragmatically, 4.19, 2.59 and 1.76 m ha are deficient in total N, exchangeable K and available P, respectively. This could guide soil nutrient management decision for sustainable yam production in the area.