A record number of voluntary conservation practices adopted by Chesapeake Bay farmers since 2006 has significantly reduced the amount of nitrogen, sediment and phosphorus leaving cultivated croplands, according to a recently released report.
The report, part of the U.S. Department of Agriculture’s Natural Resources Conservation Service, estimates that since 2006, conservation practices applied by farmers and landowners are reducing nitrogen leaving fields by 48.6 million pounds each year, or 26 percent, and reducing phosphorus by 7.1 million pounds, or 46 percent.
The report, part of the Conservation Effects Assessment Project, notes these practices have also lowered the estimated average edge-of-field losses of sediment, or eroded soil, by about 15.1 million tons a year, or 60 percent -enough soil to fill 150,000 railcars stretching more than 1,700 miles. The majority of the conservation practices in the Chesapeake Bay were made possible through Farm Bill conservation programs, which are now expired.
“This report demonstrates that voluntary conservation practices made possible through the Farm Bill can have a substantial impact on limiting nutrient and sediment runoff from farms in the Chesapeake Bay Watershed and across the nation,” Agriculture Secretary Tom Vilsack said.
“These conservation efforts help to clean our soil and water, boost outdoor recreation that adds more that $640 billion to our economy, and ensure that agriculture has the tools to remain productive in the years to come. The good work of Chesapeake Bay landowners has generated substantial progress in a short period of time, but more needs to be done, which is why it is critical that Congress act now to pass a Farm Bill that provides the full array of programs and incentives to build on these efforts.”
The Chesapeake Bay watershed touches six states and is home to 17 million people and almost 84,000 farms and ranches. Agriculture contributes about $10 billion annually to the region’s economy. Conservation practices have other environmental benefits, such as sequestering carbon and making farms more resilient to extreme weather events linked to climate change.
Because of these efforts, the report highlights a wider acceptance of innovative conservation practices. Notably, some form of erosion control has been adopted on 97 percent of cropland acres in the Chesapeake Bay Watershed.
While this does not mean all acres are fully treated to address sediment and nutrient losses, it is a positive indication of a willingness by farmers to do their part to help restore the bay watershed. Also, the report shows an increased use of cover crops by bay watershed farmers. Farmers are using a variety of other conservation practices, such as no-till, that help keep nutrients and sediment on fields and out of nearby waterways.
In October, the Chesapeake Bay Watershed Initiative expired due to the expiration of the 2008 Farm Bill, reducing the technical and financial assistance available to bay watershed producers.
The CEAP report is part of USDA’s effort to quantify the benefit of conservation efforts on private lands in major watersheds, including the Mississippi River and Great Lakes as well as the Chesapeake Bay.
CEAP reports combine farmer surveys, natural resource information and advanced modeling techniques to assess the effects of conservation practices on cultivated cropland, which accounts for 10 percent of the land in the bay watershed.