Soil profile has ______________ number of layers , the _____________ layer has large amount of humus and it supports the growth of ______________. It is ___________ in colour because of ______________. The second layer contains large amount ____________________ and also known as ____ horizon. The last layer is called _______________ and it is made off ___________.
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Explanation:
Three
uppermost
plants
darker
huge amount of organic matter.
Topsoil
A
clay
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