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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.
Contributors in 土壌学
Soil science
交換性陽イオン割合 (ECP)
地球科学; 土壌学
特定の陽イオンを吸着複雑な土壌を占めている程度。として表現: ECP = ((交換性陽イオン (cm kg 1 土壌))/(陽イオン交換容量 (cm kg 1 土壌))) 100