leaf total nitrogen concentration
Total leaf nitrogen content TLN
changes in soil organic carbon and total nitrogen
Content of total nitrogen
Dynamics of soil organic matter and total nitrogen
estimation of the total nitrogen
Ginkgo biloba leaf total flavonoids
hainan holly leaf total flavonoids
persimmon leaf total flavonoids
Rate constant of mineralization Study on the Spatial Variability of Soil Total Nitrogen in
Ratio of total nitrogen to nicotine
Soil organic carbon and total nitrogen
Soil total nitrogen
微生物氮
土壤全氮含量
土壤全氮
土壤总供氮量
土壤总氮
全氮
soil total nitrogen and total phosphorus
soil total nitrogen STN
the recovery ratio of total nitrogen