1Indian Agricultural Statistics Research Institute, New Delhi-110012
2Indian Council of Agricultural Research, Krishi Bhawan, New Delhi-110014
3Project Directorate for Farming Sysyems Research, Modipuram, Meerut, 250110
4ICAR Research Complex for Goa, Ila, Goa
5ICMR, Jodhpur (Rajasthan)
Online published on 27 June, 2012.
A long-term experiment was initiated Under All India Co-ordinated Research Project on Cropping Systems during 1977–2003 to study the long range effect of a crop sequence with high yielding varieties at graded fertilizer levels on yield stability and soil fertility. Under this broad objective a study had been undertaken to predict and estimate the grain yield based upon best fitted linear/nonlinear models. For all the nineteen treatments, linear/nonlinear models have been fitted to obtain the estimated yield as well as predicted yield for further three years. This paper presents linear/nonlinear models for the estimation of grain yield over time and discusses the results of applying these models to grain yield values under RWCS from LTE.
Yield estimation, cropping systems, interpolation, Linear, Non linear models
