The effect of various pruning methods and of chemical growth retardation on yield , fruit quality and disease incidence of apple varieties during full bearing in the Hofchen long-term trial
Hilkenbaumer, F.; Kolbe, W.
Erwerbsobstbau 14(11): 161-167
The effect was tested during full-bearing years of various degrees of pruning on trees trained as spindles and espalier crowns and of aminozide, 3400 p.p.m. at 2 to 3 weeks post-flowering, with James Grieve, Cox's Orange Pippin, Jonathan and Golden Delicious on M.4. The highest average yields with all pruning methods for 9- to 13-year-old trees were with Golden Delicious (93.5 kg/tree) and James Grieve (83.4 kg); Jonathan and Cox's Orange Pippin had decidedly lower yields.