Home / Standards / GB/T 39228-2020 GB/T 39228-2020 Active Determination of soil microbial biomass—Fumigation-extraction method 土壤微生物生物量的测定 熏蒸提取法 Standard Type GBT ICS 13.080 CCS B10 Status 现行 Issue Date 2020-11-19 Implementation 2021-03-01 Responsible Dept 农业农村部 Drafting Unit N/A