未熟—低熟有机质
immature or lower-mature organic matter
外源有机质
extraneous source organic matter
exotic organic material
土壤有机质含量
Soil organic matter content
Soil organic matter
organic maer
土壤有机质
Soil organic matter
soil organic matter SOM
organic matter
soil organic
Oasis cotton field
Soil organic matters
Soils organic matter
soil organic carbon
soil OM
soil organic substance
soil nic matter
Organic
Soil organic matter content
organic matter of soil
soil humus
Som
organic matter in soil
organic matter content
organic fertilizer
soil organic mater
the organic material of soil
organic material in soil
soil organism
土壤生物活性有机质组分
biologically active soil organic fractions
土壤颗粒态有机质
soil particulate organic matter POM
土壤活性有机质
soil labile organic matter
soil active organic matter
active soil organic matter
Soil active organic substance
碎屑状固态有机质
organic clastic particles