• Contamination of Rumen Samples during Washing

      Pickard, J. (Society for Range Management, 1976-09-01)
    • Diets of Wild Horses, Cattle, and Mule Deer in the Piceance Basin, Colorado

      Hubbard, R. E.; Hansen, R. M. (Society for Range Management, 1976-09-01)
      Diets of free-roaming wild horses, domestic cattle, and mule deer were estimated for three altitudinally different vegetation zones in the Piceance Basin, northwestern Colorado. Wild horses and cattle ate mostly grasses and sedges in each of the vegetation zones. Mule deer diets consisted primarily of browse. Wild horse and cattle diets compared within a vegetation zone were more similar to each other than diets of a single herbivore compared between vegetation zones. The percentages of the diets of wild horses and cattle that were identical ranged from 59% to 75% in the three vegetation zones. Diet overlap of wild horses or cattle with mule deer was always less than 11%. The diversities of plants on the diets were lower for mule deer than for cattle or wild horses.
    • Effect of Repeated Herbicide Applications on Green Sagewort in North Central Nebraska

      Morrow, L. A.; McCarty, M. K. (Society for Range Management, 1976-09-01)
      Plots were established in 1971 to determine the effect of herbicides on stands of green sagewort (Artemisia campestris L.). Treatments were applied in 1971, 1972, and 1973 for one study and in 1972 and 1973 for another study. Visual estimates of green sagewort control were made in 1971, 1972, 1973, and 1974. Repeat applications of 2,4-D ester at 2.24 or 3.36 kg/ha effectively controlled green sagewort whether applied in 2 or 3 consecutive years. Dicamba or picloram, each in combination with 2,4-D ester, also effectively reduced the stand of green sagewort. Green sagewort was not controlled effectively by 2,4-D ester alone at rates less than 2.24 kg/ha or 2,4,5-T at rates of 1.12 or 2.24 kg/ha. Picloram, when applied alone, was not as effective as in combination with 2,4-D ester. Retreatment is necessary when attempting to control green sagewort. Two consecutive annual application of 2,4-D ester effectively reduced the stand. After reducing the stand of green sagewort, spraying every 2nd or 3rd year as a maintenance program may be adequate to keep populations of green sagewort plants at a minimum.
    • Effects of Grazing Management on Natural Pastures in a Marginal Area of Southeastern Australia

      Michalk, D. L.; Byrnes, C. C.; Robards, G. E. (Society for Range Management, 1976-09-01)
      The main reason for examining grazing management as a means of controlling barley grass (Hordeum leporinum) was that in marginal areas between reliable cropping and true semiarid rangeland areas, it is uneconomic to consider a chemical or mechanical eradication program, particularly as there is no desirable improved grass species which can be sown as a replacement. The study shows that in this environment the removal of barley grass by heavy grazing early in the autumn may result in crowfoot (Erodium spp.) dominant pastures, which although productive in winter-spring, does not carry over as dry feed and also produces seed which cause damage to stock. Alternatively, hard grazing in late winter increased the proportion of barley grass in the pasture and the number of seedheads per unit area. However, this pasture may be suitable for sheep grazing, since the seedheads were formed close enough to the ground to make the areas effectively seed free areas for livestock.