1. Soil microbial, chemical and physical properties in continuous cotton and integrated crop–livestock systems;Acosta-Martinez;Soil Sci. Soc. Am. J.,2004
2. Integrating cotton and beef production to reduce water withdrawal from the Ogallala Aquifer in the Southern High Plains;Allen;Agron. J.,2005
3. Allen, V.G., Daniels, W.L., Evanylo, G., Fontenot, J., Laub, C., Taylor, D., Vaughan, D., Youngman, R., Zajac, A., 1994. Sustainable crop and livestock systems for the Southeastern United States. 1994 Progress Report. Virginia Tech, 49pp.
4. Sustainable and conventional grazing systems for beef steers;Allen,1997
5. Allen, R.G., Pereira, L., Raes, D., Smith, M., 1998. Crop evapotranspiration. FAO Irrigation and Drainage Paper 56. FAO, Rome, Italy.