1. Adjei MB, Mislevy P, Ward CY (1980) Response of tropical grasses to stocking rate. Agron J 72:863?868
2. Alward RD (1992) The roles of competition and herbivory in maintaining the local distributions of two native grasses. M.S. Thesis, University of Nebraska, Lincoln
3. Barnes PW, Harrison AT, Heinisch SP (1984) Vegetation patterns in relation to topography and edaphic variation in Nebraska Sandhills Prairie. Prairie Nat 16:145?158
4. Beard JB (1973) Turfgrass: Science and Culture. Prentice-Hall, Englewood Cliffs, New Jersey
5. Belsky AJ (1986) Does herbivory benefit plants? A review of the evidence. Am Nat 127:870?892