Agrinine ammonification rate,biomass C,soil ATP content and substrate induced respiration were determined in 13 soils.Arginine ammonification rate was 0 1 to 17 1mg NH 4 N/h·kg soil.There were significant linear relationships between arginine ammonification rate,microbial biomass C,soil ATP content and substrate induced respiration.Comparing with other techniques,arginine ammonification technique was much simpler,faster and cheaper.This technique can be used as a simple technique for esti...