Journal of Range Management, Volume 32, Number 5 (September 1979)
http://hdl.handle.net/10150/635628
2024-03-28T09:58:34ZJournal of Range Management, Volume 32, Number 5 (September 1979)
http://hdl.handle.net/10150/650458
Journal of Range Management, Volume 32, Number 5 (September 1979)
Complete digitized issue.
1979-09-01T00:00:00ZTolerance of Kleingrass to Herbicides
http://hdl.handle.net/10150/646591
Tolerance of Kleingrass to Herbicides
Bovey, R. W.; Baur, J. R.; Bashaw, E. C.
Herbicides propazine, 2,4-D, dicamba, picloram, tebuthiuron, and hexazinone were applied at rates of 0.14 to 2.24 kg/ha pre- and postemergence to greenhouse-grown kleingrass plants. Kleingrass was tolerant to premergence sprays up to and including 1.2 kg/ha of propazine and 0.56 kg/ha of 2,4-D. All other herbicides and rates were phytotoxic to emerging kleingrass. At the early postemergence stage, kleingrass tolerated rates up to and including 0.28, 0.56, and 0.56, and 1.12 kg/ha of picloram, 2,4-D, dicamba, and propazine, respectively; but it did not tolerate tebuthiuron or hexazinone at any rate. At the intermediate vegetative stage (5 to 12.5 cm tall), kleingrass tolerated picloram, 2,4-D, dicamba, and propazine at rates of 0.56, 1.12, and 2.24 kg/ha, respectively, without injury. Mature kleingrass tolerated higher rates of all herbicides than did earlier stages of growth.
1979-09-01T00:00:00ZSafety Modifications for Operations and Transportation of the Rangeland Drill
http://hdl.handle.net/10150/646568
Safety Modifications for Operations and Transportation of the Rangeland Drill
Spencer, J. S.; Rashelof, V. M.; Young, J. A.
The drill-arm assemblies of rangeland drills modified to make furrows are difficult and dangerous for one person to raise and secure. A simple modification for safe lifting of these drill arms is described. For transporting rangeland drills on equipment trailers, loading ramps, wheel chocks, and tie-downs were developed and tested. All of these modifications make the use of rangeland drills safer and easier.
1979-09-01T00:00:00ZRenovation of Sparse Stands of Crested Wheatgrass
http://hdl.handle.net/10150/646561
Renovation of Sparse Stands of Crested Wheatgrass
Eckert, R. E.
Atrazine at 0.56 kg/ha and simazine at 1.12 kg/ha were evaluated for renovating sparse stands (0.9 to 1.5 m between plants) of resident crested wheatgrass. The study was repeated for 3 years for both weed control and seeding of crested wheatgrass. Both herbicides reduced yield and reproductive potential of downy brome and tumble mustard in the fallow year. Neither herbicide significantly damaged the vegetative or reproductive parts of resident crested wheatgrass plants. Atrazine residues in the soil in the fall of the fallow year and spring of the seeding year were below the toxic level for crested wheatgrass seedling. Simazine residues were above the toxic level. Both herbicides increased seed production of resident crested wheatgrass plants and neither adversely affected seed test weight and germination, or root and shoot growth of seedlings from seed of these plants. Weed competition during the seedling year was reduced by herbicide treatment. Density of crested wheatgrass seedlings and established plants was greatest on treated plots in 2 of 3 years. Based on low triazine residues and increased crude protein, resident crested wheatgrass on treated areas would be excellent forage during the fallow year. High levels of NO3- N, trans-aconitate, and K, but low Mg suggest that grass tetany could be a problem if lush herbage on treated areas was grazed during the spring period.
1979-09-01T00:00:00Z