Fig. 2

Soil microbial biomass in the three zones and three soil layers (mean ± S.D.). (a–c): microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and microbial biomass phosphorus (MBP), respectively.

Soil microbial biomass in the three zones and three soil layers (mean ± S.D.). (a–c): microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and microbial biomass phosphorus (MBP), respectively.