Phosphorus fertilizers in Nigerian savanna soils. I-Use of phosphorus sorption isotherms to estimate the phosphorus requirement of maize at Samaru

Abstract

Yields of two successive crops of maize (cv. 096 Yellow) were related to sorption equilibrium solution phosphate levels. The grain yield approached its maximum when the equilibrium elution concentration was about 0·30 ?.g/ml. Use of phosphorus sorption isotherms, a technique that takes into account both capacity and intensity factor , appears to be a workable system of predicting P requirements of crop grown on savanna soils with low P buffering capacities.