WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Friday, September 21, 2018

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1300. Cheema, S.S., D.S. Kler and D.S. Grewal. 1985. Improve wheat yields through bi-directional sowing.. Indian Farming, 35:7-9.
Experiments for 8 seasons showed that bi-directional sowing suppresses weeds, minimises the incidence of powdery mildew and brown rust. Primary yield contributing character was the higher number of effective tillers per unit area. Uniformly spaced plants without overcrowding within the rows, get more solar radiation. Relatively less penetration of light to ground surface resulted in lower soil temperature in bi-directional sowing.

1581. Dhillon, G.S. and D.S. Grewal. 1982. Increasing fertilizer efficiency and minimising disease and weeds. Energy Conservation and Use of Renewable Energies in the Bio-Industrial Nations..
Sowing in two directions produced significantly higher biological and grain yield with the same cost. Grain production per kg of nutrients used averaged 21.8 kg for sowing in two directions, 20.6 kg for north-south and 19.6 kg for east-west direction. Sowing in two directions showed a significantly reduction (31.4%) dry matter production of weeds, powdery mildew and brown rust.

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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