Seeding Rate/ Varieties/ Row Spacing, High Yield
The soybean variety, Channel variety maturity 1.4, was either seeded in 30 in. wide rows with a planter or in 7.5 in. wide rows with a drill on June 8th 2017. The seed was untreated. Plots were seeded at either 75k, 105k, 135k, 170k, or 205k pure live seeds (PLS) ac-1. A total of 8 replications were completed for the 30 inch row beans versus the 7.5 inch row drilled beans at these different seeding rates. The 90% germination value from the seed tag was used to calculate PLS.
For this particular study there was a very significant yield difference between 30 inch row and drilled beans by 6 bushels. The drilled beans had a 6 bushel average advantage over the row beans across 8 replications. It’s important to note that soybean yield response to seeding rate and row spacing combinations are highly variable and that results from multiple site-years and your own on-farm testing should be taken into consideration when choosing an appropriate seeding method.
Authors: Thandi Nleya and Graig Reicks
Trial funded by South Dakota Soybean Research and Promotion Council