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What are the different layers of soil?


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September 27, 2017 3:26AM

Top·soil - the upper fertile layer of soil from which plant roots take nutrients.

Hu·mus - a brown or black complex variable material resulting

from partial decomposition of plant or animal matter and forming

the organic portion of soil.

Eluviation - the transportation of dissolved or suspended material within

the soil by the movement of water when rainfall exceeds evaporation.

Regolith - the layer of loose rock particles that covers the bedrock of most land

on earth.

Bedrock - the solid rock beneath loose rock particles or soil.

Mineral - a solid homogeneous crystalline chemical element or compound

that results from the inorganic processes of nature; broadly : any of various

naturally occurring homogeneous substances (as stone, coal, salt, sulfur,

sand, petroleum, water, or natural gas) obtained usually from the ground.