It was figured out that the soil water content and plant biomass were the key factors to affect the soil organic carbon content.

可以认为土壤含水量和植物生物量是影响土壤有机碳含量的重要因素。

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And under the same temperature and moist condition, the relatively value of CO2 released rate was increasing with the soil organic carbon content.

相同温度与土壤水分条件下，CO2排放速率相对值大小随土壤有机碳含量增加而增加。

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The results showed that straw application increased crop yield, soil organic carbon accumulation, soil total nitrogen and phosphorus content as well as phosphorus activation.

结果表明，秸秆还田提高了作物产量，增加了土壤有机碳积累和土壤氮磷含量，且能活化土壤磷素。

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Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

CNN: Soil study hints at climate model revision