This is a two-year project collaboration with Dr. Alison Robertson, ISU plant pathologist, who has recently been studying incidence of seedling disease on corn following cereal rye cover crops. Cooperators would commit to two years of conducting trials. Based on previous conversations and on-farm research, we already have an experimental design in mind:
1. Rye cover crop terminated 18 days before planting corn
2. Rye cover crop terminated 6 days after planting corn
Replications: 4 or 5
Previous crop: soybeans
Cover crop: Cereal rye seeded in fall 2019 and fall 2020
At-planting N rate: 30-50 lb N/ac (balance of your program applied at sidedress)
Cover crop biomass from each strip just prior to termination
Corn stand counts in each strip 3-4 weeks after planting
Corn grain yield and moisture from each individual strip
Robertson lab team responsibility
Corn seedling disease severity, shoot height, radicle length, shoot weight and N content at V2-V3
Soil temperature dataloggers
Corn stalk nitrate concentration at physiological maturity
Cooperators will commit to conducting trials in the 2019-20 and 2020-21 cover crop-corn cycles (two crop years).
Compensation includes $550 research honorarium each year as well as reimbursement for cover crop seed up to $300 each year.