EFFECTS OF THINNING IN A LONG-TERM TRIAL WITH SIX APPLE CULTIVARS ON YIELD AND FRUIT SIZE
The results clearly demonstrate that yields are and must be markedly reduced in the on-years. Though regularity of cropping was oftenly improved by thinning, the loss of fruit could not be compensated by it. This was also true for the improvement of fruit size: there was some compensation for the loss of small fruit, but not enough to yield the same fruit quantity as in control trees. The early hand-thinning method always gave the best results as regularity of cropping, yield of marketable fruit and monetary value of the crop are considered. But this method costs so much time that it is impracticable for growers.