Abstract
Abstract A combination of mechanical and hand pruning each year from 1971-1976 reduced pruning time over that of hand pruning alone for ‘Delicious’ apple (Malus domestica Borkh.). Yield was not significantly affected by pruning method with one exception in 1975. The use of the mechanical pruner destroyed the framework of the tree by inducing a thick canopy and reducing light penetration. Yield was increased by limb positioning at both the 2.3- and 3.0-m spacings. In 1974, higher yields were obtained with the 1.5-m spaced trees and in 1979 with the 3.0-m spaced trees. Average fruit weight was less for the 1.5-m spaced trees than for the 3.0-m spaced trees.
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