Cultivar Differences in Canopy Apparent Photosynthesis and Their Relationship to Seed Yield in Soybeans¹

Differences in leaf photosynthesis among soybean [ Glycine max (L.) Merr.] genotypes have not been shown to be correlated with seed yield, probably because leaves selected for measurement have not been representative of the soybean canopy. In order to obtain a measure more representative of photosynthesis by plant communities and to explore the relationship of canopy apparent photosynthesis (CAP) to seed yield, field experiments were conducted...