Browse on keywords: grass weed
Search results on 05/20/13
2918. Idaho Agr. Expt. Sta.. 1950. Annual Report. Id Agr. Expt. Sta. Bull. #280.
T: hay yields, economics
3559. Kennedy, A.C., F.L. Young, and A.G. Ogg. no date. Control of downy brome and jointed goatgrass using soil bacteria.. unpublished report, USDA-ARS, PUllman, WA 99164-6421.
Naturally occurring soil bacteria were isolated that inhibited the growth of downy brome and jointed goatgrass, but not winter wheat. Over 5000 isolates were examined, and more than 50% were inhibitory to one of the weeds in laboratory growth. In a field test, plant population and above ground growth of downy brome were reduced 31% and 53% respectively. The bacteria were active at cool temperatures, an advantage in suppressing the weed after fall emergence. The bacteria are viewed as an adjunct to herbicide control, as their suppression is not enough to prevent economic crop loss. However, the lack of available herbicides for goatgrass makes this potential control very important. Proper application methods to insure organism survival are yet to be worked out.
4576. Morrow, L.. 1989 Aug.. Cheatgrass: winter wheat nemesis.. Growers Guide, p. A6.
Describes the germination requirements of cheatgrass. Usually 90-95% of new seed germinates, and seldom does it germinate in late spring. Getting the seed in contact with the soil via tillage is essential to trigger germination. Also, a competitive crop is needed, and the use of starter fertilizer may give a crop a growth edge.
7028. USDA Soil Conservation Service. 1955. Joint Utah - Idaho Conservation Dryland Farming Guide.. .
Describes 3 basic rotations for the region: 1) grass/alfalfa - no more than 2 yr grain (Class IV land, precip. >17"); 2) grain - fallow - various rotations with alfalfa/grass or sweetclover depending on precip. (12-17"); 3) permanent grass/legume, with no more than 2 yr grain (precip 9-12", Class IV land); lists adapted grass and legume varieties; describes use of rotary hoe and skew treader for weed control. T: grass varieties.
10020. Koscelny, J.A., T.F. Peeper, J.B. Solie, and S.G. Solomon. 1990. Effect of wheat (Triticum aestivum) row spacing, seeding rate, and cultivar on yield loss from cheat (Bromus secalinus).. Weed Technology 4:487-492.
Field experiments were conducted in Oklahoma to detemine the effects of row spacing, cultivar, seeding rate and water or ammonium fertilizer injection in the row at seeding, on the competitiveness of hard red winter wheat with cheatgrass. All treatments were planted with either weed-free wheat or cheat-infested wheat seed. Decreasing row spacing from 23 to 8 cm increased yield of weed-free wheat at two of three locations and cheat-infested wheat in six of ten experiments. Increasing seeding rate from 265 to 530 seeds/m increased wheat yield. Injecting water at 20 ml/m of row at seeding did not increase wheat emergence or yield. Cheat seed production was not consistently suppressed by any one cultivar.
10416. Smith, L. (ed.). 1991. North central Idaho county extension field crop demonstrations, 1989-1990.. ID Agr. Expt. Sta. Misc. Series 152, Moscow..
The results of numerous on-farm tests are reported. Some tests were replicated, while others were simply demonstrations. The tests were organized by county extension agents.
10776. Rydrych, D.J.. 1990. A summary of jointed goatgrass cultural and chemical control in wheat - 1990.. 1990 Columbia Basin Agricultural Research, Special Report 860, Corvallis, OR. p. 49-51.
Present herbicide options for controlling jointed goatgrass in wheat are not effective. Potential cultural controls include crop rotation, spring crops, perennial crops, double fallow, and field burning. The most effective cultural control is spring planted crops. Double fallow has provided 92% control without selective herbicides. Herbicides plus no-till have been 98% effective.