• Rough Fescue (Festuca scabrella Torr.) in Washington

      Hodgkinson, H. S.; Young, A. E. (Society for Range Management, 1973-01-01)
      In Washington, rough fescue occurs primarily north of the 47 degrees latitude and east of the Cascade Mountains. There are two large, well-represented areas. Other locations are represented by small areas, some containing only scattered plants. Rough fescue is very palatable and should be managed as the key species when it makes up more than 15% of the total plant composition. To maintain or improve good stands, no more than 50% of the annual current year's growth should be removed.
    • Snow Amount in Relation to Streamflow and Herbage Production in Western Colorado

      Frank, E. C. (Society for Range Management, 1973-01-01)
      A 10% increase in peak snowpack, due to cloud seeding or natural events, is partly returned as runoff but has little, if any, immediate effect on the productivity and use of mountain grasslands.
    • A Comparison of Sampling Methods in Dense Herbaceaous Pasture

      Poissonet, P. S.; Poissonet, J. A.; Gordon, M. P.; Long, G. A. (Society for Range Management, 1973-01-01)
      Several methods of vegetation sampling were compared in a very homogeneous herbaceous vegetation: Needle points, double metre points, bayonet points, line transects, area measurements, and harvesting with sorting and weighing. Consistent curvilinear relationships were found between species frequencies, interceptions, and biomasses obtained by several methods. These constant relationships allow the estimation of yields from the double metre points by simple and fast observations. The shape of the curves suggests some ecological relationship between the vegetation attributes analyzed.
    • Heat Effects on Nutrient Release from Soils Under Ponderosa Pine

      White, E. M.; Thompson, W. W.; Gartner, F. R. (Society for Range Management, 1973-01-01)
      Litter and mor of ponderosa pine-forest soils released more water-soluble K and P following heating to 200 C than at higher or lower temperatures. The upper A1 horizon released the most water-soluble P and K following, respectively, 200 C and 500 C heat treatments. Total nitrogen decreased in the samples heated in excess of 200 C. Prescribed burning to control noncommercial pine on rangeland apparently would have little detrimental effect on K and P availability and cause a slight reduction in total nitrogen if heating is kept below 200 or 300 C.
    • Interaction of Fertility Level with Harvest Date and Frequency on Productiveness of Mixed Prairie

      Lorenz, R. J.; Rogler, G. A. (Society for Range Management, 1973-01-01)
      Management practices are needed which will insure sustained production from fertilized mixed prairie. Prior to establishing grazing management practices, a better understanding of N and P fertilizer effects on the vegetation is needed. The interaction of harvest date and frequency with annual applications of N and P was studied over an 8-year period near Mandan, N. Dak. Yield increases were significant when 40 lb. N/acre (40-N) and 80-N were applied, but application of 160-N produced little or no increase over the yield from 80-N. Average yields were 548, 1,298, 1,875 and 1,908 lb./acre for the 0-, 40-, 80- and 160-N levels, respectively. Without N, response to P was small and generally not significant. When N was applied annually, response to P became significant in the fourth and subsequent years. Yields at all fertilizer levels decreased as frequency of harvest increased. Greatest yield reductions occurred when the sequence included harvest in June.
    • Large Alligator Junipers Benefit Early-Spring Forage

      Clary, W. P.; Morrison, D. C. (Society for Range Management, 1973-01-01)
      The production of early-spring grasses in central Arizona was four to five times higher under crowns of large alligator juniper than for similar sized areas away from the trees. Virtually all utilization of green forage by grazing animals at this time of the year occurred under the juniper crowns. These large alligator junipers should be protected during pinyon-juniper control operations.