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Online Maps Help Cut Manure Runoff Risk

June 15, 2011
 
 

Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

 
New online tools can help Wisconsin farmers know when conditions are right to spread manure on their land, so it stays on the fields to fertilize the soil instead of risking pollution of streams and groundwater.
 
The web-based Wisconsin Manure Management Advisory System is comprised of two mapping tools that help farmers manage both the long- and short-term risk of manure runoff.
 
One tool, nutrient application restriction maps, will help farmers manage long-term runoff risk. The maps show appropriate areas and seasons for applying manure and fertilizers, based on over 30 years of weather history. This helps avoid long-term phosphorus build-up in soils, reduces the chances of nitrogen leaching into groundwater, and cuts the risk of winter spreading on fields where it should be avoided. 
 
The second tool, called the runoff risk advisory forecast, helps farmers during the few times each year when runoff risk is high and they need “just-in-time” planning to avoid it. These maps are updated twice daily to show what parts of the state are at high risk for runoff in the next three days, based on rainfall, snowmelt, soil moisture, temperatures and weather forecasts.  In the winter, they will show whether soils are frozen or snow-covered, or snow is melting.
Both tools are available at http://www.manureadvisorysystem.wi.gov/.
 
“We’ve been developing these systems over several years as part of our efforts to better manage animal waste and fertilizer applications,” said Jim VandenBrook, water quality section chief for the Wisconsin Department of Agriculture, Trade and Consumer Protection.
 
“We’ve drawn on the expertise of a lot of state and federal partners to come up with a practical system. Crop consultants and nutrient management planners have already been using the nutrient application restriction maps, as have farmers. With the addition of the new runoff risk advisory forecast, farmers don’t have to guess how risky it is to spread manure.”
 
The mapping website is a joint project of the Wisconsin Department of Agriculture, Trade and Consumer Protection; Wisconsin Department of Natural Resources; National Oceanic and Atmospheric Administration-National Weather Service River Forecasting Center; U.S. Department of Agriculture-Natural Resources Conservation Service; University of Wisconsin-Madison College of Agricultural and Life Sciences and Soil Science Department; Discovery Farms; UW-Platteville and its Pioneer Farm; and U.S. Geological Survey.
 

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