Table 8: Best covariance model based on the smallest deviance and the largest Wald statistic ( ) in repeated measures analyses of cumulative yield, CumY, temporal yield variance, TYV, and coefficient of variation, CV, to test for Time × Treatments (Time × Trt) interaction and Time × Phase within Treatments interaction (Time × Phase(Trt)) in conventional (CNV) and organic (ORG) cropping systems of a long-term experiment.

SystemFactorModelVariables
CumYTYVCV%
The largest Wald statistic;

ConventionalTime × TrtAR1496.5
UNS74.6
Time × Phase(Trt)ANT14756.0
UNS1432.07395.0

OrganicTime × TrtAR1611.0
UNS135.0197.0
Time × Phase(Trt)UNS1730.0780.0795.0