The purpose of this study is to compare 7.5 in. drilled and 15 in. planted soybeans, at various planting populations, in an attempt to determine the Economic Optimum Seeding Rate (EOSR) for each row width in a double crop system.

2017 Southern Illinois Soybean Double Crop Row Width and Population Study

Last year, double crop soybeans in 15 in. rows showed a substantial yield gain compared to drilled soybeans, with the best planting population at 260,000 seeds/A. This year, BECK 454L4brand planted in 15 in. rows had an EOSR of 260,000 seeds/A. while BECK 474L4brand was best at 200,000 seeds/A. in the 7.5 in. drilled plot. When the two varieties were averaged, the best yield occurred at the 140,000 seeds/A. rate on drilled soybeans! We believe this is likely a result of the abnormally dry conditions we experienced, as less plants mean less competition for water and nutrients. Another observation from this study was that the drilled soybeans held a 2.2 Bu./A. advantage over planted soybeans. With more space between plants in the row in abnormally dry conditions, this also makes sense agronomically.

 Pre: 1 qt. Liberty®, 1 qt. Roundup PowerMAX® Post: 1 qt. Liberty®, 4 oz. Anthem® Maxx, 4 oz. Section® Three |

2021 Iowa Soybean SINGULATION STUDY 15 IN. ROWS

2021 Iowa Soybean STARTER FERTILIZER STUDY 2X2X2

Row Width and Population Study

2017 Southern Illinois Soybean Double Crop Row Width And Population Study

Use whenever the name of a PFR Study mentions Population, Planting Date, Planting Depth, Planting Speed, Planting Film, Singulation, Talc, Row Width, Soil Amendment, Pre-Emerge, Pre-Emergent, Delayed Planting, Crop Rotation, Water Management, Tire Pressure, Strip Cropping, Herbicide Additive, and/or Maturity.