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Semidwarf and Standard-Height Cowpea Responses to Row Spacing in Different Environments

Dep. of Botany and Plant Sciences, Univ. of California, Riverside, CA 92521-0124 USA

View larger version (17K): [in a new window]   Fig. 1 Grain yield responses (yield at 51 cm–yield at 102 cm row spacing) of semidwarf (open symbols) and standard-height (closed symbols) cowpea lines as affected by vegetative responses (vegetative biomass at 51 cm–vegetative biomass at 102 cm row spacing). Data are from four environments. R = Riverside, S = Shafter; 8 = 1998, 9 = 1999. The solid linear regression line has an r2 of 0.99

View larger version (15K): [in a new window]   Fig. 2 Grain yield (±SE) of semidwarf (open symbols) and standard-height (closed symbols) cowpea lines averaged over three environments (Riverside 1998, Shafter 1998, and 1999) where early vegetative growth was moderate to vigorous