土壤磷素分布
soil phosphorus distribution
土壤磷素分级方法
soil phosphorous fractioning methods
土壤养分分布
soil nutrient distribution
土壤养分分布图
soil nutrients distribution map
土壤养分分级
classification for soil nutrition
根际土壤养分
rhizosphere soil nutrients
耕层土壤养分调查
investigation of topsoil nutrients
土壤磷分级
phosphorus fractions
Classification of soil phosphorus
Fractionation of soil inorganic phosphorus
土壤磷分级与测定
soil phosphorous fractionation and determination
土壤磷素
soil phosphorous
Soil phosphorus
Fraction of phosphorus
Soil phosphate
phosphorus of soil
fractions of phosphorus
phosphorous situation in soil
Soil
Phosphorus
soil p
31P NMR
the water level fluctuating zone
土壤磷素活化剂
Soil phosphorus activator
土壤磷素吸持作用
rice-based cropping system
土壤磷素状况
the status of soil phosphorus