Determining Proper Row Orientation and Seeding Population for Soybean Production.

Data was conducted in 2017 and 2018 at Stoneville, MS to determine if single-row or twin-row configuration on 102 cm rows would increase soybean (Glycine max L.) grain yield while reducing seeding population. Our primary objective was to determine if seeding rates could be reduced from the current Mississippi State University recommendation; and determine if row configuration could increase grain yield on wide rows. All trials were conducted under irrigated condition with weed and disease monitored to Mississippi State University standard. Planting population ranged between 104,000 and 156,000 seeds per acre. Plant height was significantly taller using greater planting populations. Seed weight was significantly decreased when using the twin-row planting configuration. Neither planting population nor row configuration had a significant interaction on change in initial stand count. Canopy closure was recorded throughout the reproductive growth stages, using Canopeo phone application. Row orientation showed no differences in yield neither did planting population; reducing the seeding rate had economically benefits. Although low planting populations can maintain similar yields as medium or extremely high populations, seeding recommendations need to remain in the 100,000 seeds per acre range. Even though no yield boost can be seen from the twin row orientation if possible due to the faster canopy closure then herbicide applications can be reduced which is adventitious in the presence of resistant weed species. The importance of this data proves that seeding rates can be reduced and still maintain grain yields although a row orientation did not provide a yield boost both have beneficial characteristics.