Location: Soil and Water Management Research
Project Number: 3640-12000-008-05
Start Date: May 01, 2008
End Date: Apr 30, 2013
Nitrogen source studies will be conducted at two sites in Becker, MN and one site in Rosemount, MN to collect greenhouse gas emissions data from corn and potato cropping systems. A controlled release polymer-coated urea (ESN) and/or a stabilized urea source (SuperU) and Urea as a conventional source will be applied to each cropping system at each location. Except for the irrigated site at Becker, all sites are rainfed cropping systems, with either conventional tillage or no-tillage management practices, or both. Nitrogen rates at each location will include at least a near optimal N rate (for greenhouse gas data collection) for the crop and cropping system. The N sources will be applied using normal farming practices at each location. Nitrous oxide emissions from each N source treatment and a check (zero fertilizer N applied) treatment will be monitored several times each week during the growing season. Methods used for greenhouse gas measurements will follow those established for the ARS GRACEnet program. Crop yield data, needed soil water and temperature data, and other necessary data needed to interpret the greenhouse gas emissions results will be collected. A scientifically sound experimental design with a minimum of 3 replications will be used at each location.