"No border agent wants to unload all those horses, shovel out that manure, " he says.

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Many new initiatives in the bill fund research and programs for farm-based biofuels, including everything from making methane out of cow manure to planting switchgrass and especially, growing corn to make ethanol, which has been promoted as a means toward energy independence.

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Rachel Wyatt, of the MCS, said farmers must "look at land management practices, put up more fences to keep cattle out of rivers and change patterns of manure spreading".

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Lawyers for Perdue, which owned the chickens, and the Hudson family said chicken manure wasn't getting out in great enough amounts to pollute, and farmer Alan Hudson testified that he took steps to avoid pollution and to keep the manure in chicken houses.

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Vibrating screens sift out organic particles which are then sold as manure for land in agriculture.

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