Abstract
Yield potential in navy bean (Phaseolus vulgaris L.) is often reduced by one or more factors that damage or remove the photosynthetic area of the plant. The objective of this study was to model yield response of navy bean to seven levels of defoliation, ranging from 0 to 100% that were imposed manually at four phenological stages of plant growth (early vegetative, flowering, mid-pod fill). The study was conducted in 1988, 1989, and 1991 on a Typic Hapludalf (1988) and a Humaquept soil (1989, 1991) at Ridgetown, Ontario, Canada. Levels of defoliation were obtained by dividing each trifoliate leaf into six sections at the mid-vein of each leaflet [...]
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