Browsing Journal of Range Management, Volume 35, Number 1 (January 1982) by Subjects
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Dietary Overlap between Sheep, Cattle, and Goats When Grazing in CommonThe chemical and botanical composition of the diets of esophageally fistulated sheep, cattle, and goats was monitored over a period of 1 year at intervals of approximately 2 months. The animals were grazing together in a poplar box (Eucalyptus populnea) woodland community with an understory of shrubs, chiefly Cassia and Eremophila spp., and an herbaceous field layer of grasses and forbs. Diet quality, as assessed by in vitro digestibility, was highest for sheep in all seasons. The degree of dietary overlap, and hence potential competition, was greatest between goats and cattle. Both goats and cattle had a high proportion of browse plants in their diets. Discussion centres on the degree of overlap in the diets and the complementarity of grazing under common-use.
Reseeding by Eight Alfalfa Populations in a Semiarid PastureEight alfalfa populations were seeded in a dryland pasture in northern Utah. Densities of mature plants, seeds, seedlings, and 1-year-old plants were measured in each of 3 years. The populations did not differ for mature plant stands or seed production. There was a higher rate of seedling survival for populations that primarily originated from Medicago sativa rather than M. falcata. All populations had some one-year-old plants persisting to replace mature plants killed by disease or rodents.