soil

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soil map of the world

soil profiles on hillslopes

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soil: Related Content

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Photos and Videos

soil map of the world

soil profiles on hillslopes

Learn how weathering of rock and the activities of organisms help in soil formation

How do plants absorb water and nutrients?

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Topics

duricrust soil liquefaction horizon clay humus Vertisol Spodosol Gelisol Aridisol Chernozem mineral meteorite mineral deposit rock tektite dust regolith climate Equator How Old Is Earth?

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Key People

Curtis Fletcher Marbut

American geologist

Ruffin, Edmund

Edmund Ruffin

American scientist

Selman Abraham Waksman, 1968.

Selman Abraham Waksman

American biochemist