The apple as affected by varying degrees of dormant and seasonal pruning . n together with the amount of this growth removedat the annual prunings. It must be understood that this doesnot represent an exact measure of the volume of wood pro-duced each year for the heavily pruned trees produced fewerbut larger shoots than were produced upon the lightly prunedtrees. Consequently the longitudinal growth of the heavilypruned blocks weighed more per running foot than did thatof the lightly pruned blocks. This difference in character ofthe terminal growth is more than offset by the annual increasein
The apple as affected by varying degrees of dormant and seasonal pruning . n together with the amount of this growth removedat the annual prunings. It must be understood that this doesnot represent an exact measure of the volume of wood pro-duced each year for the heavily pruned trees produced fewerbut larger shoots than were produced upon the lightly prunedtrees. Consequently the longitudinal growth of the heavilypruned blocks weighed more per running foot than did thatof the lightly pruned blocks. This difference in character ofthe terminal growth is more than offset by the annual increasein diameter of the main branches. These branches in the 10 W. VA. AGRL EXPERIMENT STATION [Bulletin 158 lightly pruned trees are longer, not having been headed back,and consequently the total volume of the ring of new growthput on by them is greater than that on the heavily prunedtrees. It is interesting to note from Table III that for thefirst two years, 1912 and 1913, the heavily pruned trees pro-duced as much as or slightly more growth than did the lightlypruned Fig. 1.—Row on Heavily Pruned, Row on Right Lightly Pruned(Stark Variety). Unfortunately the lightly pruned plot at one end dippedinto a depression where the soil seemed to be richer andgrowth was correspondingly greater than in the remainder ofthe plot. To overcome this difficulty a number of trees werediscarded so that this plot finally contained four trees and theheavily pruned plot contained nineteen trees. TABLE III.—Average Total Length per Tree of Annual LongitudinalGrowth and Length in Feet Removed Each Year. (Stark Variety). HEAVY PRUNING LIGHT PRUNING Season ofGrowth [Average Total Length of Growth Average Length Removed PercentRe. moved Average Total| Length of Growth Average Length Removed PercentRe-moved Gain in Feet Over Heavy Pruning 1911 . - - 1912191319141915
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