提高土壤肥力
increasing of soil fertility
不同肥力
different fertility level
Different fertilizer
different nutritional levels
不同肥力土壤
Soils with different fertility
长期肥力监测
Long-term monitoring of fertility
长期土壤肥力试验
Long-term soil fertility experiment
氮肥肥效
nitrogenous fertilizer effect
氮肥高效利用率
High nitrogen utilization ratio
肥力
Fertility
Soil
Fertilizer
Fertile
Fertilization
soils
Soil fertility
fenility
fertility level
Amelioration of marine saline soil
肥力的生态相对性
Fertility ecological relativity
肥力分级指标
Soil fertility grading index
nutrient classification index
肥力配比
Proportional ferti1izer application