The Center for Agricultural and Rural Development's Resources Conservation Act, 1980 model (CARD/RCA) did not include a range production sector. After reviewing the 1980 process and its limitations, it was decided that for some alternatives, especially those requiring conversion of lands to cropland, a range sector should be included in the model. This paper outlines some of the assumptions and components developed for a range sector model.
Sircar, Pradeep Kumar and English, Burton C., "A Conceptual Framework from which a Range Sector is Developed" (1982). CARD Working Papers. 9.