Spring-Interseeded Winter Rye Seeding Rates Influence Weed Control and Organic Soybean Yield
Figure 2
Gross margins for spring-interseeded winter rye rates for wide (76-cm) and narrow-row (19-cm) soybean. The gross margin was calculated as the difference between gross receipts and weed management costs. Fitted lines describing seeding rates are for wide rows (open diamonds, , ), narrow-row low (NRL, open squares, , ), and narrow-row high (NRH, open triangles, , ). The vertical bars represent the standard errors of the means. The weedy check gross margin was $367.04 ha−1, $461.84 ha−1, and $502.45 ha−1 for wide-row, NRL, and NRH systems, respectively. LSD () was $175 ha−1.
