• Controlling Red Threeawn on Abandoned Cropland with Ammonium Nitrate

      Hyder, D. N.; Bement, R. E. (Society for Range Management, 1972-11-01)
      In our experience, red threeawn is more sensitive to N fertilizer than any other species. This sensitivity is fortunate because a low rate (20 lb./acre) of N fertilization controlled red threeawn, improved botanical composition, and increased herbage yield on an abandoned plowed field on the Central Great Plains. This work suggests the need for additional research to determine whether 20 lb. N/acre may cause succession to bypass the static Aristida stage and change botanical composition more quickly to desirable forage species.
    • Paraquat Kills Geyer Larkspur

      Hyder, D. N. (Society for Range Management, 1972-11-01)
      Geyer larkspur, a poisonous, perennial forb, is highly susceptible to paraquat applied when flowering stems are slightly above ground. At 1/2 lb./acre, paraquat killed 90 to 95% of geyer larkspur, but was less effective when the treatment was preceded with 2,4-D at 2 lb./acre. Textile onion and most annual species were susceptible to paraquat, while all other perennial species were resistant. There was some reduction in herbage yields in the year of treatment. Although paraquat is not registered for controlling geyer larkspur, it could be considered for that purpose.