The study on the impact of conversion of permanent grassland to farmland on the soil organic carbon pool was conducted in the reclaimed grassland in Karst area of northwest Guangxi.The result showed that soil dissolved organic carbon,microbial biomass carbon and total organic carbon declined significantly after the conversion of permanent grassland to farmland.The level of soil organic carbon in the soil growing citrus trees was higher than that in the cropland,and the concentration of soil organic carbon i...
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