ON THE RELATIONSHIP BETWEEN POLLEN CAPTURE AND SEED SET IN CONIFERS

A log-log function (log Y = log a + b log X) is used to model the rela tionship between seed yield and pollen capture (PC) as estimated with field samplers. In this model, Y is seed yield, X is estimated PC, and log a and b are, respectively, intercept and slope of the linear rela tionship between log X and log Y. The model indicates that seed set in creases rapidly with initial increase in PC, and closely approaches or reaches an asymptote at PC values that are low compared with maximum PCs measured in field situations.