Abstract
Cumulative yield, yield efficiency, and trunk cross-sectional area were measured between 1965 and 1980 in an experimental planting of ‘Bartlett’ and ‘d'Anjou’ pear on 8 rootstocks: seedlings of ‘Bartlett’; imported French; Pyrus betulaefolia Bunge.; P. calleryana Decne.; P. usurriensis Maxim.; ‘Winter Nelis’; clonal ‘Old Home’; ‘Old Home’ × ‘Farmingdale’ (un-numbered). Considering only cumulative yield and yield efficiency, the best rootstocks were P. betulaefolia, ‘Old Home’ × ‘Farmingdale’, ‘Bartlett’ and imported French for ‘Bartlett’ scions, and ‘Old Home’ × ‘Farmingdale’, ‘Bartlett’ and ‘Winter Nelis’ for ‘d'Anjou’.
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