耕作土壤主要养分形态及丰缺指标
Main Nutrient Conformation and Plentiful-lack Index in Farming Soil
森林土壤类型极其复杂，不同土壤中各种有效养分形态和数量差异很大。
The forest soil 's type was extremely complex , the shape and quantity of available nutrient had a distinct difference in different soil .
土壤养分形态