ABERNATHY, John R. et al. Ecological Impacts of Federal Conservation and Cropland Reduction Programs. Council for Agricultural Science and Technology (CAST), Ames, U.S.A., 1990. DOI: 10.62300/rfagt759. Disponível em: https://publications.cast-science.org/CAST/article/view/236. Acesso em: 2 jul. 2026.