Northern Research and Demonstration Farm
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 with some hybrids being recommended at higher seeding rates. Because corn plant populations and grain yields are increasing, there has been a renewed interest in looking at corn seeding rate and nitrogen rate interactions.
Schnabel, Matt and Licht, Mark
"Corn Population and Nitrogen Trial,"
Farm Progress Reports: Vol. 2016
, Article 99.
Available at: http://lib.dr.iastate.edu/farmprogressreports/vol2016/iss1/99