Question

In a well-developed soil profile, which horizon is the uppermost layer?

Answer 1

Answer: The A Horizon

Explanation:

A soil horizon can be define as a layer of soil laying parallel to the surface of the earth. The distinct soil horizons may vary due to difference in composition, texture and color.  The main soil horizons are A, B, C and O. The A horizon is the uppermost soil horizon. It includes the fine grained weathered particles and partially or completely decomposed organic matter obtained from the plant and animals biological wastes.

Answer 2

Answer;

The A Horizon

Explanation;

-The major soil horizons are A, B, C and other soil types may have horizon O, which may be thick or thin and also not present in some soils.

-The A horizon is the uppermost layer in the soil profile. It is a weathered layer of the soil and is composed of an accumulation of humus and other microbial biomass which are mixed with minerals that are small-grained.