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parent material

   Also found in: Wikipedia 0.01 sec.
parent material [′per·ənt mə‚tir·ē·əl]
(geology)
The unconsolidated mineral or organic material from which the true soil develops.

parent material
The material from which a soil has been formed.


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The B horizon has undergone extensive changes during soil genesis so that the original parent material is no longer discernible; clay minerals have commonly accumulated by being translocated from above, and new minerals may have formed in place via chemical and physical reactions.
Parent material of high carbon content, S, P content is high, should select crack resistance and anti-gas-strong electrode, such as low hydrogen sodium (potassium) electrode.
The substantially flat portion includes a first parent material and a reinforcing material made of long-fiber sheet.
 
 
 
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