• Element Content of Crested Wheatgrass Grown on Reclaimed Coal Spoils and on Soils Nearby

      Erdman, J. A.; Ebens, R. J. (Society for Range Management, 1979-03-01)
      Fairway crested wheatgrass [Agropyron cristatum (L.) Gaertn.] was analyzed to determine the possible effects of coal spoils at the Dave Johnston Mine, Wyoming, on the chemical composition of this widely used reclamation species. Concentrations of 8 of the 26 elements tested by analysis of variance showed significant differences between the samples growing in 10-15 cm of topsoil covering the spoils and samples from soils nearby. Samples from the mined areas showed about 50% higher concentrations. Concentrations of manganese and uranium, however, were about 150 and 200% higher, respectively. Concentrations of the trace elements cobalt, manganese, and zinc-essential in animal nutrition-ranged from deficient levels in "control" samples to adequate or marginal levels in samples from reclaimed spoils. The phosphorus content of grasses that grew on spoil material was two-thirds that of the control grasses, to the point where the former may be nutritionally deficient as a cattle forage.
    • Molybdenosis: A Potential Problem in Ruminants Grazing on Coal Mine Spoils

      Erdman, J. A.; Ebens, R. J.; Case, A. A. (Society for Range Management, 1978-01-01)
      Copper-to-molybdenum ratios in all but two sweetclover samples collected on spoil at eight coal mines in the Northern Great Plains ranged from 0.44:1 to 5:1. Ratios of 5:1 or less in forage are reported to cause molybdenosis, a nutritional disease occurring in molybdic regions of the world. Therefore, if the major forage on coal-mine spoils is sweetclover or other species with similar Cu:Mo ratios, molybdenosis may be expected to occur in cattle and sheep grazing in these areas.