Abstract

Field experiments were conducted with the primary objective of investigating the soil test crop response relationships of sugarcane crop. Surface soil samples collected from the plots of these experiments were analysed for available nitrogen (alkaline KMno,-N and organic carbon), phosphorus (Oisen's-P and Bray's-P) and potassium (neutral N NH,OAc-K and 0.1N HNO-K). Relationship between soil test values and cane yield/ nutrient uptake. was established by simple correlat on studies and multiple regression analysis with linear, quadratic polynomial and square root polynomial functions. The results revealed that the organic carbon, Olsen's-P and 0.1N HNO-K are the best indices, respectively of nitrogen, phosphorus and potassium availabilities to sugarcane crop.

Keywords: Sugarcane, Soil testing procedures, Nutrient uptake