The Know Your Farmer interactive map shows USDA-supported projects and programs related to local and regional food systems for the years 2009-2011. USDA hide caption

itoggle caption USDA

Perigord truffles for sale in southwestern France. American farmers say they've figured out how to make the delicacy flourish in Appalachian soils. Regis Duvignau/Reuters /Landov hide caption

itoggle caption Regis Duvignau/Reuters /Landov

Almond trees rely on bees to pollinate during their brief bloom for a few weeks in February. Winfried Rothermel/APN hide caption

itoggle caption Winfried Rothermel/APN

Breeding sows in crates at a subsidiary of Smithfield Foods in 2010. The photo was shot by the Humane Society as part of an undercover investigation. Humane Society/Associated Press hide caption

itoggle caption Humane Society/Associated Press

At the JS West egg farm, south of Modesto, Calif., one chicken house has the new, spacious cages that egg producers and animal welfare advocates say keep chickens happier. Big Dutchman hide caption

itoggle caption Big Dutchman

The S&W Seed Co., in Five Points, Calif., will grow these seedlings of zero-calorie stevia in the fields of California's Central Valley. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

The new version of the map includes 13 zones, with the addition for the first time of zones 12 (50-60 degrees F) and 13 (60-70 degrees F). U.S. Department of Agriculture hide caption

itoggle caption U.S. Department of Agriculture

Heirloom beets served at Bibiana Restaurant in downtown Washington, D.C. Joseph Silverman/The Washington Times /Landov hide caption

itoggle caption Joseph Silverman/The Washington Times /Landov

Georgia O'Neal harvests winter greens at the Tree and Leaf Farm in Unionville, Va., on March 16, 2011. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Algae blooms in the mouth of the Elizabeth River in Norfolk, Va., on July 31, 2010. Rain, high temperatures, and pollution from agricultural runoff made for ideal algae bloom conditions. Morgan Heim/AP hide caption

itoggle caption Morgan Heim/AP

A Chinese beekeeper harvests honey beside a rapeseed field in Anhui province. China is a major producer of honey and bee products. AFP/AFP/Getty Images hide caption

itoggle caption AFP/AFP/Getty Images

Maryland farmer Josie Johnson listens to a lecture on extending the farming season using caterpillar tunnels. The lesson was part of a conference for young farmers held in Tarrytown N.Y., in early December. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR