Objective:
The objectives of the time frame of 06/29/2007 through 09/28/2007 are: 1) Complete summer and fall measurements of ammonia emissions on three Wisconsin dairy farms measured previously during the winter of 2006-2007; 2) Process, analyze, and summarize data collected on ammonia emissions from three Wisconsin dairy farms during the winter of 2006-2007, summer 2007, and fall 2007; and 3) Provide information, opinions, and judgement (as requested by USDFRC) for discussions of (potential) planned work for FY2008.

Approach:
Air emission measurements will be made periodically over a 1-year period from 4-6 prominent dairy farm types. Representative dairy operations will be selected from: 1) a pool of dairy farms participating in the National Dairy Emissions Project funded by the National Milk Producers Federation/EPA Consent Agreement (implemented by Purdue University); 2) a pool of dairy farm collaborators in the Air Quality/Odor Emissions Project of Wisconsin's Dept. of Agriculture, Trade & Consumer Protection; & 3) other dairy farms that might bolster ongoing research at DFRC & other dairy research collaborators. Whole-farm emissions may include measurements of ammonia & methane. Emission detectors & other equipment will be purchased & used to evaluate emissions from farm operations 3-4 times per year. Specific farm components (housing, manure storage, manure land-spreading) may be evaluated as time, resources, & interests become available. Gas concentration detectors & other equipment with atmospheric physics technology will be used to determine emissions remotely from farm production sites. Multiple detectors as available may be used to compare emission measurements.