Seeding Rate/ Varieties/ Row Spacing, Medium Yield
This field was in Brookings County, South Dakota. The soybean variety AG18XF1 was planted in 30-inch rows on May 21, 2022, at 140k seeds/ac. Two 60 ft. wide strips were planted at 110k seeds/ac to evaluate the potential of lower seeding rates. Soybeans were harvested in 30 ft. wide passes on September 27, 2022. The field was classified into three different yield zones: low (less than 35 bu/ac), medium (35-55 bu/ac), and high (more than 55 bu/ac). This report evaluates medium yield zones. UAV image was collected on August 17, 2022, and an NDVI map was generated for plant health assessment across the field.
Reducing seeding rates from 140k to 110k/acre had no effect on yields or NDVI. Additional seeding rate trials would be beneficial in future years to continue evaluating this cost saving practice.