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Soil Organic Carbon Dynamics in Pastures Established After Deforestation in the Humid Tropics of Costa Rica
註釋Root exudates of grass plants were found to have a minor direct contribution to the longer term carbon dynamics, either because exudation rate was small or because decomposition was fast and complete.Decomposition of soil organic matter was measured using the delta 13C method, which uses differences in natural 13C isotope levels in vegetation (C3 and C4 vegetation) and soil organic matter to calculate changes in soil organic carbon.