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Sunday, April 22, 2018

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Search results on 04/22/18

8773. Jones, D.P. (ed.). 1976. Wild oats in world agriculture.. Agriculture Research Council, London. 296 pp..
This extensive review book covers all aspects of wild oat (Avena fatua) growth, competition, and control. It includes chapters on cultural control and biological control, as well as chemical control. The effect of straw burning on wild oat is temporary relief but seldom gives much long-term improvement. Considerable loss of seed can occur from the surface of uncultivated soil, due to biological factors, during the first 4-5 months after seed fall. Seed loss can be much lower when the soil is cultivated during this period. Rodents and birds can consume considerable amounts of wild oat seed.

3845. Lee, G.A., M.E. Coleman and G.A. Mundt. 1980. Wild oat: competition and crop loss.. ID Agr. Expt. Sta. CIS #541.
Fall crops compete better with wild oat; weed can utilize moisture more efficiently than crops; wild oat an efficient N user; N fertilizer increases seed yields of crop and weed; total crop loss is greater in fertilized fields; allelopathic effect is supected; delayed spring seeding can help; first few wild oat plants cause most yield reduction; weed removal prior to 2-leaf prevents yield loss in spring crops; good data on crop-weed relationships. T: yield loss, crop-weed relations.

3855. Lee, G.A., G.A. Mundt and M.E. Coleman-Harrell. 1980. Wild oat - identification and biology.. ID Agr. Expt. Sta. CIS #540.
Wild oat a native of Europe; weed seed found in most grain samples; wild oat an annual grass, very adaptable to many climates; can exhibit seed dormancy (3-5 yrs in Idaho soils); spring germination most common, when soil is 50-60 degrees F; in Idaho, germination from late April to early June; wild oat best adapted to small grain rotations; compete better with short straw wheats.

7264. Veseth, Roger. 1990. Fertilizer placement-row spacing effects on wild oat.. STEEP Conservation Farming Update, Winter 1990, p. 13-16..
Researchers examined the effect of deep-banding N fertilizer versus a broadcast application, and also a paired-row configuration (15" between pairs) versus an 8" single-row pattern, on wild oats and the yield of spring barley. Deep-banding the N significantly increased barley yields, and reduced wild oat growth and competition, compared to broadcasting N. Banding was more effective in the paired row system than the single rows during a normal moisture year. With broadcast N, wider row spacing led to more wild oat growth.

9724. Reinertsen, S., V.L. Cochran and L.A. Morrow. 1983. Response of spring wheat to N fertilizer placement, row spacing, and wild oat herbicides in a no-till system.. Agronomy J. 76:753-756..
A 2-year study was conducted on a north facing Thatuna silt loam (fine-silty, mixed, mesic Xeric Argialbolls) to evaluate the influence of N fertilizer placement, crop row spacing, and wild oat (Avena fatua L.) herbicides on wild oat populations and wheat yield in no-till spring wheat. The treatments were factorial arrangements of ammonium nitrate either surface applied preplant or banded 50 mm below the crop seed at planting; wild oat control using triallate premergence, difenzoquat post-emergence, or no herbicide (check); and crop row spacings of either 200, 300, or 400 mm. Surface-applied fertilizer N significantly increased wild oat populations compared with banding the N fertilizer below the seed, but had no effect on dry weight or N uptake. Banded N increased total dry weight N uptake, and grain yield of wheat. These responses indicate that banded fertilizer N was positionally more available to wheat than was broadcast N, but banding N did not reduce availability of N to wild oat. However, surface applied N stimulated wild oat emergence. Triallate decreased wild oat populations compared to difenzoquat or no herbicide, but was no more effective than difensoquat in reducing wild oat dry weight and total Kjeldahl N uptake. Both herbicides reduced wild oat dry weight as compared to the no herbicide check and significantly increased wheat yields. Row spacing did not affect wild oat dry weight or total N uptake, but the 200 m row increased wheat dry weight, total Kjeldhl N uptake, and grain yields compared to the 300 and 400 cm rows. There were no significant interactions.

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