5Food and Agriculture Organization of the United Nations Mixed Crop-livestoek farming: A review of tradltiona technologies based literature and field experience [R] Rome: FAO. Animal Production and Health, 2001: 152.
7ttANS J.B.. SCHIERE R., LOUIS BAUMHARDT, et cal. Mixed crop-livestock systems in semiarid regions [M]. Michigan: American Society of Agronomy, Inc.,2006: 227-292.
10SrI~;VE, ALLEN, HILDEBYAND. An analysis of a crop-forage-livestock on a representative farm in south- east kansas using linear programming[ M ]. Manhattan : Kansas State University. 1986.
