Journal
SOIL & TILLAGE RESEARCH
Volume 53, Issue 3-4, Pages 215-230Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-1987(99)00107-5
Keywords
aggregates; land use; organic matter decomposition; soil C storage
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Tillage has been reported to reduce organic matter concentrations and increase organic matter turnover rates to a variable extent. The change of soil climate and the incorporation of aboveground C inputs within the soil lead to no unique effect on biodegradation rates, because of their strong interaction with the regional climate and the soil physical properties. The periodical perturbation of soil structure by tools and the subsequent drying-rewetting cycles may be the major factor increasing organic matter decomposition rates by exposing the organic matter that is physically protected in microaggregates to biodegradation. This paper reviews the assessed effects of tillage on organic matter, the scale, extent and mechanisms of physical protection of organic matter in soils. (C) 2000 Elsevier Science B.V. All rights reserved.
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