1. The apple as affected by varying degrees of dormant and seasonal pruning;ALDERMAN;W. Va. Agric. Exp. Sta. Bull.,1916
2. Topping reduces peach pruning costs;Am. Fruit Grower,1962
3. Summer pruning as related to growth control of four apple cultivars;ASELAGE;Compact Fruit Tree,1977
4. The effect of shade on the growth, fruit bud formation and chemical composition of apple trees;AUCHTER;Proc. Am. Soc. Hortic. Sci.,1926