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Photoperiod And Planting Date Effects On The Spatial Distribution Of Branch Development In Soybean, John Settimi, James Board
Photoperiod And Planting Date Effects On The Spatial Distribution Of Branch Development In Soybean, John Settimi, James Board
John R. Settimi
Reduced branch development in late-planted soybean [Glycine max (L.) Merr.] is a cause of yield reductions in the southeastern USA. To determine the effects of photoperiod and planting date on the spatial distribution of branches, photoperiod simulations of an optimal (24 May) and a nonoptimal late planting date (24 June) at Baton Rouge, LA (30°N Lat), were imposed on ‘Centennial’ soybean in growth chambers. In a field study, ‘Lee 74’ was planted at optimal (mid-May) and nonoptimal (early July) planting dates in 1984 and 1985 at Baton Rouge, LA, on an Olivier silt loam (fine-silty, mixed thermic Aquic Fragiudalf) soil. …