Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/20/1997
Publication Date: N/A
Technical Abstract: A short-season high-density sorghum [Sorghum bicolor (L.) Moench] production strategy (hybrid DK18 or DK28E planted in 38-cm-spaced rows at 158,000 seed ha**-1) was compared with standard dryland sorghum production [DK41y planted in 76-cm-spaced rows at 79,000 seed ha**-1 from 1991-1996 with early (early-mid June) and late (26 June - 2 July) planting dates]. All plots were on fallowed Pullman clay loam. Grain yields of short-seaso high-density sorghum were equal to or greater than yields of standard sorghum in all years but one with early planting. With late planting, yields were always greater with the short-season high-density strategy due to freeze damage with the longer season hybrid. Short-season high-density sorghum yields averaged 4080 and 4130 kg ha**-1 for early and late planting, compared to standard sorghum yields of 3640 and 1680 kg ha**-1. The short-season high-density production strategy works well in the Southern Plains if available soil water plus growing season precipitation totals 400 mm or more, and a hybrid with good standability is used. The strategy is particularly well adapted to late planting.