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PA Farmers Urged to Minimize Manure Input on Fields During Winter

By Danielle Smith

Winter in Pennsylvania brings farmers not only snow and freezing temperatures but stricter manure-spreading regulations to minimize water pollution.

Putting manure on farm fields is discouraged during winter months or when the ground is snow-covered or frozen at least four inches deep.

Robert Meinen, assistant research professor and extension specialist at Pennsylvania State University, said manure can provide essential nutrients to crops and reduce fertilizer costs but the nutrients have to stay in the fields to maximize their value and not run off into waterways.

"One of the drawbacks is, and the trade-off is, that we have to be careful because we also have environmental risk -- in particular, nitrogen and phosphorus -- if they get into surface water or groundwater, can cause pollution," Meinen explained.

Meinen pointed out in Pennsylvania, farms fall into different categories, including concentrated animal feeding operations, which the Environmental Protection Agency defines based on animal numbers and manure output. The large-scale operations face stricter federal oversight but the state's winter manure laws apply to all farms.

Meinen noted farmers applying manure in winter must follow strict guidelines, including Manure Management Plan requirements. He added winter applications require more conservative measures than in warmer weather, from lower application rates to field slope limitations.

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