The Conservation Reserve Program (CRP) is a cost-share and rental payment program of the United States Department of Agriculture (USDA). Under the program, the government pays farmers to take certain agriculturally used croplands out of production and convert them to vegetative cover, such as cultivated or native bunchgrasses and grasslands, wildlife and pollinators food and shelter plantings, windbreak and shade trees, filter and buffer strips, grassed waterways, and riparian buffers. The purpose of the program is to reduce land erosion, improve water quality and effect wildlife benefits. The program originally began in the 1950s as the conservation branch of the Soil Bank Program which was enacted by the Agriculture Act of 1956. The theory behind this branch of the Soil Bank Program was to focus on lands that were at high risk of erosion, remove them from agricultural production, and establish native or alternative permanent vegetative cover in an effort to counteract actual or potential erosion. This was considered by proponents to be beneficial to sustainable agriculture generally, by lessening the effects of erosion. Originally, the program called for three-year contracts in which the government would pay for land improvements that increased soil, water, forestry, or wildlife quality if the farmer would agree not to harvest or graze contracted land.