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Comparison of oxidative and hydrolytic methods of soil organic matter fractionation with classic alkaline extraction in natural humus horizons
 STROSSER, Eduard
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System of evaluation of soil organic matter based on fractionation by level of hydrophilic characteristics and by characterisation of fractions with differential thermic analysis
 STROSSER, Eduard
The contemporary methods of evaluation of the soil organic matter do not sufficiently characterize its stability. The aim of this study is to develop a method for soil organic matter stability evaluation. The four different methods were tested, two based on chemical principle a two on microbiology principle. The first method is based on sequential soil organic matter fractionation by a system of solvents with increasing polarity, the second method uses oxidizers with different oxidizing efficiency. In the third method micro-organisms decompose soil organic matter in anaerobic environment as well as in the four method, but this one makes use of up gas production measuring sensors. The method of sequential extraction is not suitable for practical use, the oxidation method is preferred. The oxidation method also both microbiology methods imply that the most important part of soil organic matter is decomposed rapidly or while using weak oxidizer. This fraction is the most important for evaluation decomposability and it is characteristic for particular soils. After decomposition of this part of SOM its remnant is decomposed steady and linear or micro-organisms are not able to decompose it.
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