1. Ruminant nitrogen usage;National Research Council,1985
2. A critical review of remote sensing and other methods for non-destructive estimation of standing crop biomass;Tucker;Grass and Forage Science,1980
3. Hanselka CW, McGinty A. How much forage do you have? Texas Cooperative Extension Service Bulletin; B-1646. Texas A&M University, College Station; 2006.
4. Troxel TR, White LD. Balancing forage demand with forage supply. Texas Cooperative Extension Service Bulletin; B-1606. Texas A&M University, College Station; 1995.
5. Quality of forage and cattle diets on the Wyoming high plains;Hart;Journal of Range Management,1983