• Benefits from Good Management on Southern Forest Ranges

      Duvall, V. L. (Society for Range Management, 1964-05-01)
    • Burning and Grazing Increase Herbage on Slender Bluestem Range

      Duvall, V. L. (Society for Range Management, 1962-01-01)
    • Common-Range Technique in Supplemental Feeding Experiments

      Whitaker, L. B.; Duvall, V. L. (Society for Range Management, 1960-09-01)
    • Comparison of Supplementation Methods for Cow Herds Grazing Pine-Bluestem Range

      Duvall, V. L. (Society for Range Management, 1969-05-01)
      Range cows furnished cottonseed cake on alternate days in winter weighed more and had higher calving percentages than cows fed daily. Calf weights at weaning were similar. Cost of distributing cake every other day was almost 40% less than for the daily schedule. Cows self-fed cottonseed meal adulterated with salt weighed as much as those fed cake daily, but both calf crop and weaning weight averaged less than for daily or alternate-day feeding. Although expense of distributing supplement was least with self-feeding, cost-return relationship was unfavorable compared to other methods.
    • Demarcation of Small Plots with Spring-Loaded Wires

      Duvall, V. L. (Society for Range Management, 1968-07-01)
      Wires have some advantages over frames for delineating plot boundaries.
    • Factors Influencing Intake of Mineral Supplements by Cattle on Southern Forest Range

      Duvall, V. L.; Whitaker, L. B. (Society for Range Management, 1970-09-01)
      Among cattle fed cottonseed cake daily in winter, salt and bonemeal consumption was greater on moderately grazed range (48% utilization) than on ranges grazed either lightly (32%) or heavily (57%). Cattle on heavily grazed range ate much less bonemeal than others. On ranges grazed moderately, cattle fed cake on alternate days in winter consumed the most salt from ad libitum supply and also ate the most bonemeal. Cattle self-fed a cottonseed meal-salt mixture ranked second in bonemeal consumption and lowest in voluntary intake of salt. Total salt eaten annually by these animals was much greater than for those fed protein supplement by other methods, however, and voluntary intake continued yearlong, even though the ration furnished far more salt than needed in winter./El estudio se llevó a cabo en el estado de Louisiana en un pastizal de Andropogon tener y Andropogon divergens, comprendiendo como potreros pastoreados con vacas todo el año, con tres cargas de pastoreo, pesada, moderada y ligera. Los animales que disponian de harinolina diariamente durante el invierno, consumieron más sal y harina de hueso en la carga moderada (40% de uso de forraje producido) en relación a las otras dos. En la carga pesada consumieron menos harina de hueso. También las que consumieron harinolina en forma terciada (un día si y otro día no) pero en la carga moderada, consumieron más sal y harina de hueso que las otras dos cargas. Las vacas suplementadas con una mezcla de harinolina y sal ad libitum, ocuparon el segundo lugar en el consumo de harina de hueso y el último en el de sal, sin embargo, la cantidad total de sal consumida por dichos animales, fue el más alto.
    • Influences of Grazing and Fire on Vegetation and Soil of Longleaf Pine-Bluestem Range

      Duvall, V. L.; Linnartz, N. E. (Society for Range Management, 1967-07-01)
      Herbage yield and density of cover were greater on moderately or heavily grazed than on ungrazed range. Botanical composition remained relatively constant under moderate use but changed markedly on ungrazed and heavily grazed ranges. Grazing compacted soils, but insufficiently to impair herbage growth or accelerate erosion. Fire had little long-range effect.
    • New Grazing Research Programs for Southern Forest Ranges

      Duvall, V. L.; Hilmon, J. B. (Society for Range Management, 1965-05-01)
      In recent decades, research has brought substantial improvement in cattle and forage management on cutover forest ranges in the South. Today, massive reforestation is complicating the problems of integrating grazing with timber growing, and research aims are shifting accordingly. This paper reviews the current southern grazing situation and describes the range research program of the U. S. Forest Service.
    • Range Research to Meet New Challenges And Goals

      Blaisdell, J. P.; Duvall, V. L.; Harris, R. W.; Lloyd, R. D.; Reid, E. H. (Society for Range Management, 1970-07-01)
      The state of range management knowledge in relation to goals of society was considered by a Forest Service committee, and an enlarged concept of "range" was developed to include both ecological characteristics and land use. Range can contribute to better living conditions by providing stability to rural communities and regional economies and a high-quality environment, with optimum fish, wildlife, and recreational opportunities. Important range research needs are to: analyze ecosystems, inventory range resources, coordinate management and use, improve resources, maintain and improve environmental quality, and analyze social and economic aspects of resource use.
    • Responses of Southern Range Cattle to Protein Supplementation

      Duvall, V. L.; Hansard, S. L. (Society for Range Management, 1967-05-01)
      Reproductive performance of range cows receiving 312 lb of cottonseed cake between November 1 and March 31 equaled that of cows receiving 432 lb fed from October through May, or 555 lb fed throughout the year. High-treatment cows were consistently heavier than those receiving medium or low rations. Cows fed the low ration were highest in plasma vitamin A, but other blood constituents were unaffected.
    • Rotation Burning: A Forage Management System for Longleaf Pine-Bluestem Ranges

      Duvall, V. L.; Whitaker, L. B. (Society for Range Management, 1964-11-01)
      In a Louisiana test, heavy utilization during growing seasons following fires applied at 3-year intervals improved forage palatability and nutritive content; the ensuing 2 years of lighter use restored plant vigor. Burning also top-killed brush and aided herbage growth by removing pine litter. Cows with calves gained weight throughout the growing season on rotation-burned range.