1. What are the three layers of soil ?
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A- horizon-
* This is the topmost horizon and also called as topsoil.
* Contains large amount of humus and minerals.
* Topsoil is soft and porous.
* Capacity of water retention of this soil is more.
* Hold the roots of the plants entirely.
* House of many living organisms such as worms, rodents, moles and beetles.
B-horizon-
* Second layer of soil profile and also called as middle layer.
* Contains larger amount of minerals than humus.
* More compact and harder than topsoil.
C-horizon-
* Third layer of soil profile.
* Small lumps of rocks are found with cracks and cervices.
Bedrock-
* The last layer of soil profile.
* Very hard.
* This layer is even difficult to dig with a spade .
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Go ask google...
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