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Soil science
That science dealing with soils as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils per se; and these properties in relation to the use and management of soils.
土壤学的贡献者
Soil science
可交换性阳离子百分比 (ECP)
地球科学; 土壤学
到的特定的阳离子所占用的土壤吸附复杂程度。它表示为: ECP = ((交换性阳离子 (厘米公斤 1 土)) / (阳离子交换容量 (公斤 1 厘米土壤))) 100