2012 Projects
Project: 253-11
Title: Effect of sulfur and potassium applications on maintaining alfalfa yields for the duration of an alfalfa stand.
Principle Investigator: Carrie Laboski, Dept. of Soil Science, UW-Madison.
Objective: To a) Determine the effect of S fertilizer on alfalfa yield and quality response, b) Determine the most effective timing/form of S applications that maximizes alfalfa yield, c) Determine the effect of recommended K and zero K fertilizer applications on alfalfa yield and quality when grown on soils testing around 120 ppm K, d) Determine the effect of recommended and zero K fertilizer applications on soil test K levels throughout the soil profile for three silt loam soils in Wisconsin, e) Assess the impact of S and K fertilization on alfalfa stand longevity.
Funding Level: $37,818
Duration: 3 years
Project: 254-11
Title: Nitrogen use efficiency of dairy manure and fertilizer as related to application timing and nitrification inhibitor use.
Principle Investigator: Carrie Laboski, Dept. of Soil Science, UW-Madison.
Objective: To a) Determine how fertilizer application timing affects N availability to corn, b) Explore the relationship between the economic optimum N rate for grain yield and the N rate where residual (post harvest) soil inorganic N concentrations begin increasing more quickly, c) Determine how manure application timing affects manure N availability to corn, d) Determine how manure application timing affects soil profile inorganic N concentrations in late fall, spring, and after corn harvest, e) Evaluate second-year manure N credits for liquid dairy manure, f) Assess the effect of Instinct™ on manure and fertilizer N availability to corn.
Funding Level: $16,134
Duration: 3 years
Project: 256-11
Title: Development of nitrate management zones using precision agriculture technologies.
Principle Investigator: Matt Ruark, Dept. of Soil Science, UW-Madison.
Objective: To determine if the development of NMZs improves nitrogen use efficiency across a landscape.
Publications/Presentations
Ruark et al. 2015. Defining nitrogen management zones with apparent electrical conductivity. 2015 Wisconsin Crop Management Conference. https://extension.soils.wisc.edu/wcmc/defining-nitrogen-management-zones-with-apparent-electrical-impacts-of-dairy-production-systems/
Funding Level: $15,069
Duration: 2 years
Project: 257-11
Title: Benefits of fertilizer technologies in no-till corn.
Principle Investigator: Matt Ruark, Dept. of Soil Science, UW-Madison.
Objective: To evaluate the effect of N fertilizer source (urea, ESN®, Agrotain®, or SuperU®) on corn productivity and nitrogen use efficiency in no-till systems.
Publications/Presentations
Ruark and Naber. 2017. Assessing the quality of polymer-coated urea. 2017 Wisconsin Agribusiness Classic.https://extension.soils.wisc.edu/wcmc/assessing-the-quality-of-polymer-coated-urea/
Ruark et al. 2013. Controlled-release fertilizers and no-till corn. 2013 Wisconsin Crop Management Conference.https://extension.soils.wisc.edu/wcmc/controlled-release-fertilizers-and-no-till-corn/
Naber, Ruark & Rosen. 2017. Testing the quality of polymer-coated urea. University of Wisconsin-Extension Publication A4127
Rosen, C.J., 2018. Merits and limitations of enhanced efficiency fertilizers. In Soil nitrogen uses and environmental impacts (pp. 289-314). CRC Press. https://www.taylorfrancis.com/chapters/edit/10.1201/b22044-11/merits-limitations-enhanced-efficiency-fertilizers-matthew-ruark-rog%C3%A9rio-soratto-carl-rosen
Funding Level: $19,469
Duration: 3 years