Concepts of soil organic matter transformations in relation to organo-mineral particle size fractions |
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| Authors: | H. Tiessen J. W. B. Stewart H. W. Hunt |
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| Affiliation: | (1) Department of Soil Science, University of Saskatchewan, Saskatoon, Canada;(2) Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, Colorado, USA |
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| Abstract: | Summary Changes in the composition of organo-mineral particle size fractions as a result of cultivation of a grassland soil are discussed with reference to models of soil organic matter formation and turnover. The data presented indicated that physically stabilized organic matter is an important reservoir, with an intermediate turnover time, which is responsible for nutrient supply in agricultural soils. Possible mechanisms of stabilization and mobilization of organic matter are presented in the light of the arrangement of organic and inorganic components of the soil. |
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| Keywords: | Carbon Concepts Cultivation effects Nitrogen Nitrogen-15 Organic matter models Particle size fractions Phosphorus |
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