Neighbour Analysis With Adjustment for Interplot Competition

Abstract

SummaryIn field experiments involving a large number of experimental plots, a neighbour analysis can be used to control environmental variation by estimating the trend within blocks.The effect of interplot competition is also another important source of variation which has an influence on the estimation e. of treatment contrasts. To reduce the effect of the variation from these sources and to improve the precision of comparison between treatments, a spatial model is proposed for incorporating trend effect and interplot competition. It is determined by a modification to the residual maximum likelihood neighbour analysis of Gleeson and Cullis (1987).