The primary goals of agriculture in Bhutan are to raise the per capita income of the people living in rural areas, to enhance self-sufficiency in staple crops, and to increase the productivity per unit of farm labor and agricultural land. Agriculture is hampered due to irrigation problem, rough terrain, poor soil quality and limited number of arable lands. But several other factors have contributed in the development of agriculture. These factors include improved quality of various cereal seeds, oil seeds, and vegetable seeds, use of fertilizers, mechanization process and trained agricultural experts.