• Control of Downy Brome on Nebraska Rangeland

      Morrow, L. A.; Fenster, C. R.; McCarty, M. K. (Society for Range Management, 1977-07-01)
      Experiments to study the control of downy brome were conducted at three locations on Nebraska rangeland. Soils ranged from a silty clay loam to a loamy sand. Herbicide treatments included atrazine, cyanazine, metribuzin, and simazine at 0.5 and 1.0 lb/acre; glyphosate and terbacil at 0.25 and 0.5 lb/acre; secbumeton at 1.0 and 2.0 lb/acre; and paraquat at 0.25 lb/acre applied in the spring. All treatments, with the exceptions of glyphosate and paraquat, were also applied in the fall. Metribuzin at 0.33 lb/acre was also applied in the fall. Atrazine, metribuzin, and simazine effectively controlled downy brome. Downy brome control and forage production were greater when these herbicides were applied in the spring. Forage production was not significantly increased when herbicides were applied in the fall, but the trend was toward increased production. Injury to perennial cool-season forage grasses was greater from spring-applied herbicides than from fall applications. Control of downy brome was greater on fine-textured soils than on coarse-textured soils.
    • Carbohydrate and Nitrogen Reserve Cycles for Continuous, Season-long and Intensive-early Stocked Flint Hills Bluestem Range

      Owensby, C. E.; Smith, E. F.; Rains, J. R. (Society for Range Management, 1977-07-01)
      Effects of intensive, early stocking (twice the normal stocking rate from May 1 to July 15) and continuous, season-long stocking from May 1 to October 1 with yearling steers on big bluestem carbohydrate and reserve cycles were studied 3 years in the Kansas Flint Hills. Big bluestem reserve carbohydrates were similar during the dormant season under both stocking systems, but lower on the intensive-early stocked pasture during mid-summer than on the continuous, season-long stocked one. By growing season's end carbohydrate reserves were similar for both stocking systems. Stocking system did not affect the nitrogen reserve cycle. Big bluestem vigor and regrowth potential were similar for both systems.