Since the mid-1980s, the U.S. government, in an attempt to reduce the environmental fallout from large-scale farming, has been paying farmers to set aside less-than-ideal land for conservation. The results have been overwhelmingly positive: Soil erosion has been reduced; chemical and fertilizer runoff has eased; habitats for game birds and endangered species have been created and enlarged. The pushback to climate change has been equally noteworthy: In 2007, the lands trapped 50 million metric tons of carbon dioxide, making the Conservation Reserve Program the most effective government-funded defense against greenhouse gases on private lands.
"We use this program for everything," said John Johnson, a U.S. Department of Agriculture deputy administrator. "We protect New York City's drinking water with it. We preserve groundwater with it. We protect the salmon habitat in the Pacific Northwest with it. It's a wonderful program."
But dark clouds are forming on the protected fields. Historically, farmers have been eager to participate in the program, and many still are. But as prices for crops have soared, a growing number of farmers have opted to put conservation land back into production. The trend is expected to accelerate--to the grave concern of many observers who caution that years of steady environmental progress could be halted, or even reversed, as buffers and habitats are converted into farmland.
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Much of the slide occurred between September and November, when thousands of farmers with contracts up for renewal chose not to renew them. The atrophy has been well distributed geographically, but it has been particularly acute in states that grow lots of corn and soybeans: In Iowa, 128,000 acres went back into farming; in North Dakota, 250,000 acres; in South Dakota, 300,000 acres. "Wheat, soybean, and corn markets are providing very strong incentives to plant more acreage this fall and next spring," then acting Agriculture Secretary Chuck Conner said at the time. "Producers responded strongly, with corn acres increasing to their highest level since 1944."
http://news.yahoo.com/s/usnews/20080401/ts_usnews/landoncepreservednowbeingfarmed;_ylt=An6Le09u3.CHOoYikTvtvQMPLBIF