Northwest and Allee Research and Demonstration Farms
Crops and Soils
Corn plant populations have increased at approximately 400 plants/acre per year over the last two decades. Seeding rates are now commonly in the 32,000 to 38,000 seeds/acre range. Additionally, grain yields are increasing at 1.8 bushels/acre per year since 1996. Because corn plant populations and grain yields are increasing, there has been a renewed interest in looking at corn row spacing, seeding rate, and nitrogen rate interactions.
Sievers, Josh and Licht, Mark
"Corn Row Spacing,"
Farm Progress Reports: Vol. 2015
, Article 121.
Available at: https://lib.dr.iastate.edu/farmprogressreports/vol2015/iss1/121