Question

A. Describe Briefly the following horizons: O, A, E, B, C, and R.

B. What are minerals and why are they important to soils? Explain.

Answer 1

A. the different soil horizons are as follows:

O- organic or humus- This horizon consists of the dead and decomposing leaves.

A- it is the topsoil. These are the minerals from the parent material and it consists of the organic materials.

E- It is also called eluviated which consists of soil particles made up of resistant materials, quartz, sand, organic matter, minerals, and clay.

B- It is the subsoil and made up of materials that leach down from the layers E or A.

C- It is called the parent materials and from this layer of the horizon the topsoil is made up of.

R- It is also called the bedrock and consists of the sandstone, limestone, quartzite, basalt.

C. Minerals are called the inorganic substance that occur naturally. The minerals in soil play a significant role in the fertlity of the soil and acts as a storehouse of nutrients. It is important to mention that the minerals hold various types of nutrients and hold them.

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