Project: 276-14

Title: Cover crops in Wisconsin: Measurable benefits to yield, residual nitrogen and soil test P

Principle Investigator: Matt Ruark

Objective:

1. To evaluate the benefit or drawbacks of cover crops on corn production.
2. Assess how fall seeded crops will reduce the environmental impact of fall applications of manure.

Publications/Presentations

Shelley et al., 2018. Winter rye cover crop and forage comparison following corn silage in Wisconsin. 2018 Wisconsin Agribusiness Classic https://extension.soils.wisc.edu/wcmc/winter-rye-cover-crop-and-forage-comparison-following-corn-silage-in-wisconsin/

Ruark and West. 2018. Fall manure and cover crops: Who wins, who loses. 2017 Wisconsin Agribusiness Classic.https://extension.soils.wisc.edu/wcmc/fall-manure-and-cover-crops-who-wins-who-loses/

Ruark, M.D. 2016. Do cover crops increase or decrease yield. 2016 Wisconsin Crop Management Conference.https://extension.soils.wisc.edu/wcmc/do-cover-crops-increase-or-decrease-crop-yields/

Ruark, Smith & Shelley. 2020. Wisconsin Cover Crop Recipe – Post Corn Silage, Going to Soybean: Use Cereal Rye. MCCC-119

Ruark, Smith & Shelley. 2020. Wisconsin Cover Crop Recipe – Post Corn Silage, Going to Corn: Use Cereal Rye. MCCC-118

Ruark, West, and Siemering. 2019. Cover crops, manure, and nitrogen management. A4178

Funding Level: $114,207

Duration: 3 years

Project: 271-14

Title: The ability of Super U ratios to increase corn grain yield in Wisconsin soils

Principle Investigator: Joe Lauer

Objective:

1. To evaluate the effect of N fertilizer source SuperU ratios with urea on corn productivity and nitrogen use efficiency in corn production systems
2. To determine of corn N use efficiency and N need changes with hybrid and N rate.
3. To obtain additional N response information to add to Wisconsin’s database upon which corn N rate recommendations are made.

Publications/Presentations

Nitrification inhibitor (SuperU™) ratios increase corn grain yield, in preparation

Funding Level: $34,861

Duration: 3 years

Project: 274-14

Title: Improving corn nitrogen utilization efficiency through slit applications on silt loam soils

Principle Investigator: Carrie Laboski

Objective:

1. Determine the effect of N application timing on corn yield, economic optimum N rate and N use efficiency on silt loam soils.
2. Determine the effect of a supplemental late vegetative N application on corn yield.
3. Evaluate the pre-sidedress nitrate test and crop canopy reflectance sensor to predict optimum sidedress N application rates.

Funding Level: $140,111

Duration: 3 years