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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
cambic 地平线
地球科学; 土壤学
已壤质很细砂或更精细,纹理的矿物土地平线已土结构而不是岩石结构,包含一些耐候型的矿物和的特点是变更或显示 mottling 或灰色的颜色、 更强的色度或比在底层的视野,更红的色相矿物材料去除或去除碳酸盐。Cambic 地平线缺乏胶结或硬结,已经太少证据的 illuviation,以满足要求的 argillic 或 spodic ...