Fig. 3From: Changing soil carbon: influencing factors, sequestration strategy and research directionFlow chart of the classification of each influencing factor. The changes in soil C were examined with a single sample t-test, and a significance level of 0.05 was used. Furthermore, “n” is the number of collected meta-analysis results. The numbers followed by “Yes” or “No” are the number of factors that met or did not meet the classification criteriaBack to article page