Post blocking gone too far! Recovery of information and spatial analysis in field experiments.
Federer (1998, Biometrics 54, 471-481) presents two analyses of field data in which high-order polynomials are fitted as random regressions to remove spatial variation. We challenge the justification of this approach and suggest some alternatives.
Gilmour
A R
AR
NSW Agriculture, Orange Agricultural Institute, Australia. Arthur.Gilmour@agric.nsw.gov.au
D000818:Animals; D001517:Coleoptera / Q000235:genetics; D005838:Genotype; D008957:Models, Genetic; D015233:Models, Statistical; D012044:Regression Analysis