Chief livestock products are dairy products, leather, meat, and wool. The country's major crops include wheat, barley, cotton, and rice. Wheat exports, a major source of hard currency, rank among the leading commodities in Kazakhstan's export trade. In 2003 Kazakhstan harvested 17.6 million tons of grain in gross, 2.8% higher compared to 2002. Kazakhstani agriculture still has many environmental problems from mismanagement during its years in the Soviet Union. Some Kazakh wine is produced in the mountains to the east of Almaty.