[Complete variances and covariances in plant stands : IV. Phenotypic correlations between growth at different ages]

1. Multiple correlations of diameters or basal areas of single trees on sums of diameters or basal areas of neighbors, weighted by reciprocal quadratic distances between tree and neighbor, including both simultaneous measurements and sums of neighbors at preceding times resulted in appreciably higher r(2) than those based on simultaneous measurements only. 2. Selection of trees with largest diameters at an age of 30-50 years compared with selection at older ages resulted in relatively small losses in selection differential.