In field crops, tobacco leads the list. One of the nation's largest tobacco producers, Virginia has four types of tobacco: (1) flue-cured--the most extensive one--grown largely in Pittsylvania, Halifax and Mecklenburg Counties with Danville and South Boston the chief markets; (2) burley tobacco grown mostly in the southwest area--Washington, Scott and Lee Counties--with Abingdon the leading market; (3) fire-cured tobacco grown in Appomattox, Charlotte and Campbell with Lynchburg and Farmville important markets and (4) sun-cured tobacco grown in central Virginia--Louisa, Caroline and Hanover Counties--with Richmond the largest market in this area. Virginia ranks first in the amount of peanut yield per acre and third in peanut production in the United States. The peanut acreage is located in southeast Virginia--Southampton, Isle of Wight, Nansemond and Sussex Counties; Suffolk is often referred to as the "Peanut Capital of the World." Corn is grown in practically every county with most acreage in Southampton, Loudoun and Pittsylvania Counties. The growing of wheat, particularly winter wheat, is widespread also, with Augusta, Rockingham and Loudoun Counties having the greatest harvest. Irish potatoes are grown extensively on the Eastern Shore (Accomack and Northampton Counties) and in the Norfolk area. Virginia ranks third in sweet potato production in the United States and Accomack, Northampton and Princess Anne Counties are the chief growers of these potatoes. Soy beans are cultivated in Norfolk, Princess Anne, Accomack, Northumberland and Hanover Counties. Hay is grown in various parts of Virginia and consists of six types: clover and timothy hay, lespedeza hay, alfalfa hay, peanut hay, soybean hay and cowpea hay. Cotton is grown in the southeast, particularly in Southampton, Greensville, Brunswick and Mecklenburg Counties. Virginia leads all the states in the production of orchard grass seed. Some oats, barley and buckwheat are grown but only in small quantities. Truck farming is extremely important. Lima beans, snap beans, beets, broccoli, cabbage, cucumbers, sweet corn, kale, onions, green peas, green peppers, spinach, strawberries, tomatoes and watermelons are grown extensively. The truck farming region is located primarily in Accomack, Northampton, King and Queen, Nansemond, Princess Anne and Norfolk Counties. Much of the truck farming crop is sent to New York City, Philadelphia, Baltimore, Boston, Washington and Atlanta.