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Saturday, September 22, 2018

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9609. Freyman, S. and M.S. Kaldy. 1979. Relationship of soil fertility to cold hardiness of winter wheat crowns.. Can. J. Plant Science 59:853-855..
In two controlled-environment experiments, N fertilizer applied to a Dark Brown prairie soil decreased cold hardiness of winter wheat, while P applied in the absence of N had little effect. When applied together, P counteracted the effect of N and produced plants as hardy as those that had received no fertilizer. The soil was rich in K; consequently applicaton of additional amounts of this element had no effect on cold hardiness. The correlation coefficient between dry weight of crowns and cold hardiness was not significant, but that between water content and LT was highly significant.

3070. Tanaka, D.L. and J.K. Aase. 1989. Influence of topsoil removal and fertilizer application on spring wheat yields.. Soil Sci. Soc. Am. J. 53:228-232.
In 3 of 5 years, soil removal treatments reduced spring wheat yields an average of 9, 28, and 45% for 0.06, 0.12, and 0.18 m soil removal treatments, respectively, over all fertilizer treatments. The data suggest that P was the most limiting nutrient and additions of N fertilizer without P resulted in small yield increases.

4518. Molla, M.A.Z., A.A. Chowdhury, A. Islam and S. Hoque. 1984. Microbial mineralization of organic phosphate in soil.. Plant and Soil, 78:393-399.
Phosphate-dissolving microorganisms were isolated from non-rhizosphere and rhizosphere of plants. These isolates included bacteria, fungi and actinomycetes. The mixed cultures were most effective in mineralizing organic phosphate and individually Bacillus sp. could be ranked next to mixed cultures.

8412. Pumphrey, F.V. and P.E. Rasmussen. 1982. Winter wheat fertilization in the northeast intermountain region of Oregon.. OSU AES Circular of Information 691, OSU, Corvallis, OR.
Early spring application of N is more effective than preplant. Rates can be reduced up to 50%. Most wheat needs S fertilizer (15-30 lb/ac) if N is added. Most soils supply enough P for high yields. There have not been significant yield responses to potassium or trace elements.

9642. Havlin, J.L., A. Radhouani, A.J. Schlegel and J. Zupancic. 1988. Phosphorus fertilization for dryland wheat in western Kansas.. Kansas Fertilizer Research p. 21-26.
Field research was initiated to evaluate the influence of phosphorus rate and placement on winter wheat production in western Kansas. The primary objectives were to (1) calibrate commonly used phosphorus soil tests; (2) evaluate P rate x placement interaction; (3) establish the optimum soil sampling depth for phosphorus; and (4) evaluate the influence of soil sampling method or scheme on soil test P and fertilizer P recommendations on fields where P has been band applied.

9706. Nyborg, M.. 1961. The effect of fertilizers on emergence of cereal grains, flax and rape.. Can. J. Soil Science 41:89-98..
Ammonium nitrate, ammonium phosphate and treble superphosphate fertilizers placed in a band with seeds of wheat, oats, flax and rape were found to delay and/or reduce emergence. Order of tolerance of these crops was oats>barely>wheat>rape>flax. The nitrogen ferilizer was more injurious than the two phosphate fertilizers, when applied on the basis of N and P2O5 content respectively. Injury to emergence increased with lower soil temperature. Damage to flax was apparently increased by soil micro-organisms. Injury to emergence was eliminated when fertilizers were broadcast or placed in a band one inch or more away from the seed.

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