WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, July 16, 2018

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1292. Chaudhary, T.H.. 1976. The effect of nitrogen source and 2-chloro-6-(trichloromethyl) pyridine (N-Serve) on the nitrogen and sulfur nutrition of wheat.. Ph.D. Thesis, Dept. of Agronomy and Soils, Washington State Univ., Pullman, WA.
The effects of urea applications with and without the product N-serve were examined. N-serve considerably reduced the loss of NH4+-N to organic transformations, and resulted in much higher amounts that were available to plants. Some problem of N toxicity resulted, but this was presumed to also be related to a lack of sulfur. T: Many. e.g.:Changes in the organic N content of the soil and N uptake by plants. Amounts of NH4+-N and NO3--N in the soil in April and August. Dry-matter yields and percentage uptake of N and S.

4766. Murray, T.J.. 1921. The effects of straw on the biological soil processes.. Soil Sci. 12(3):233-259.
Experiments are conducted to describe microbial processes. The addition of straw to soil has a harmful effect on nitrate accumulation. Nitrate being lost is transformed to organic N. The process of ammonification is inhibited above 0.9% straw content of soil. Straw is a source of energy for N fixing bacteria. Straw does not effect the biodiversity of microbe populations. Straw stimulates bacteria reproduction. Nitrates from straw are transformed to organic N and are not available to plants. The intensity of the reaction depends on the amount of the straw. T: many, eg.: Effects of straw on nitrogen fixation. Number of bacteria in soils variously treated. Bacteria in various straw treatments.

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