Nomographic and cartographic estimation of eragrostis curvula yields in natal

Abstract

The solution of a multivariate regression function for the yield estimation of Eragrostis curvula in Natal is presented in nomographic and cartographic form. The yield expression which is a complex function of, inter alia, mean annual precipitation, major soil group rating, age and nitrogen application, the latter interacting with soil depth, degree of leaching and texture, is modified to facilitate its nomographic solution.