• Range Burning

      Wright, H. A. (Society for Range Management, 1974-01-01)
      There are many uses for prescribed burning in the management of forests, chaparral, grasslands, watersheds, and wildlife. Some of these uses have been pointed out in this paper. There are also many dangers in using fire, both in its application and in its results. To minimize harmful effects, fire should never be used during extended dry periods; burns should always take place when the soil is damp or wet. Moreover, the user should be an experienced professional with a thorough knowledge of eco-systems, weather, and fire behavior.
    • Range Vegetation and Sheep Production at Three Stocking Rates on Stipa-Bouteloua Prairie

      Smoliak, S. (Society for Range Management, 1974-01-01)
      Stipa-Bouteloua prairie was grazed by sheep at three stocking rates over a 19-year period. Under continuous heavy grazing the vegetative cover and forage yield deteriorated mainly through the large increase in blue grama and the decrease in the more productive grasses. The mature ewes grazed at the heavy rate were lighter in body weight and gave birth to smaller lambs, which were weaned at lower body weights, than those grazed at the moderate or light intensities of use. The Stipa-Bouteloua prairie should be stocked at not less than 1.0 acre per ewe per month to maintain the vegetative cover in a productive condition.
    • Root Dynamics of a Shortgrass Ecosystem

      Bartos, D. L.; Sims, P. L. (Society for Range Management, 1974-01-01)
      Seasonal dynamics of roots of a shortgrass ecosystem were determined at 2-week intervals for the two growing seasons of 1969 and 1970 and at monthly intervals during the intervening fall and winter. Soil cores were taken to a depth of 80 cm during the first growing season to determine the amount and distribution of roots in the soil profile. Root samples in the second year were only taken to a depth of 10 cm, with periodic sampling to 80 cm. Some 55% of the root weight was found in the 0- to 10-cm segment, and 69% was found in the upper 20 cm of the soil profile. There were significant differences among sampling dates in root weights in the upper 10-cm increment. The mass of roots in the lower portion of the profile remained somewhat constant throughout the sampling period. No significant differences were found in the root mass among four grazing intensity treatments (ungrazed, light, moderate, and heavy).
    • Spring Food Habits of White-tailed Deer in the South Texas Plains

      Everitt, J. H.; Drawe, D. L. (Society for Range Management, 1974-01-01)
      During the spring seasons of 1970 and 1971, rumen analyses were used to determine food preferences of white-tailed deer on the H. B. Zachry Randado Ranch in South Texas. A total of 83 plant taxa were found to be eaten by this deer herd. Forbs comprised an average of 37.1% by volume of the diet, browse 33.1%, and cacti 17.5%, while grass comprised only 2.5% volume of the diet. Pricklypear cactus was heavily consumed and comprised an average of 15.4% of the total diet. Forbs were most heavily utilized in early spring. Perennial species were more prevalent than annuals in the diet. Important differences occurred in the diet between years, between early and late spring, and between the three major range sites on the study area.
    • The Zootic Disclimax Concept

      Beetle, A. A. (Society for Range Management, 1974-01-01)
      Some ecologists are using the term "zootic climax" in the same sense that range managers use the term "zootic disclimax." If our national parks are to be managed in order that they be natural, it will be important for administrators to understand these two terms and how they differ from the Climatic Climax.
    • Using a Grid to Estimate Production and Utilization of Shrubs

      Springfield, H. W. (Society for Range Management, 1974-01-01)
      Production of fourwing saltbush plants was estimated from photographs against a 1-inch grid. All squares partially or completely obscured by plant material were counted. Utilization of several shrub species was estimated from photos taken before and after browsing by deer. With modification, the technique could be used for other species and situations.
    • Winterfat Seeds Viable after 8 Years Refrigerated Storage

      Springfield, H. W. (Society for Range Management, 1974-01-01)
      Five collections of winterfat seeds from New Mexico were stored in cans under refrigeration (34-42 degrees F) and ordinary temperatures (55-95 degrees F). After 8 years of storage, viability ranged from 51 to 80% for the refrigerated seeds, but practically no seeds remained viable under the warmer storage temperatures.