Chief agricultural products include corn, sugar beets, wheat, potatoes, grapes, plums, cattle, pigs, and sheep. Vojvodina, in northern Serbia, contains the most fertile land. Cooperative farms in Yugoslavia did not take root under the socialist regime, but the government of Milosevic exported wheat and corn heavily (contributing 25 percent of Serbia's hard currency) and bartered grain for oil and gas from Iraq, Libya, Syria, and the Ukraine. This practice exploited farmers by paying them below-market prices and limiting their access to the free market. Farmers had no alternatives but to sell to state mills as most did not have storage facilities and permits to trade. Police harassed them, and if caught selling outside