Spring-Interseeded Winter Rye Seeding Rates Influence Weed Control and Organic Soybean Yield
Figure 1
Effect of spring-interseeded winter rye rate on wide- (76-cm) and narrow-row (19-cm) soybean grain yield. Fitted lines are for wide rows (open diamonds, , ), narrow rows at 494,000 seeds ha−1 (NRL, open squares, , ), and narrow rows at 741,000 seeds ha−1 (NRH, open triangles, , ). The vertical bars represent the standard errors of the means. The weedy check grain yields were 790, 1000, and 1130 kg ha−1 in wide-row, NRL, and NRH systems, respectively. Weed-free grain yields were 1900, 1740, and 1910 kg ha−1 in wide-row, NRL, and NRH systems, respectively. LSD () was 300 kg ha−1.
