O-horizon is

B-horizon is also called

A-horizon is also known as __________.

Assertion (A) : In tropical rain forests , O-horizon and A-horizon of soil profile are shellow and nutrient -poor. Reason ( R ) : Excessive growth of microorganisms in the soil depletes its organic content.

Assertion: In tropical rain forests, O-horizon and A-Horizon of soil profile are shallow and nutrient-poor. Reason: Excessive growth of micro-organisms in the soil depletes its organic content.

Read the following passage. Correct it into a tabular form. Soil is make up of distinct horizontal layers called Horizons. They are divided into O, A, E, B, c and R horizons. O-horizon made of mostly of humus, Plant roots can grow in A-horizon, Water drips through E-horizon. B-horizon is also called subsoil. C-horizon consists of slightly broken up bedrock where as R-horizon have unweathered Rock.

In the soil profile, A-Horizon is also referred to as.

Which soil horizon is rich in humus?

Which horizon in soil profile is known as top soil ?

Explain the reason for the following . At the time of sunset western horizon is seen red .

The organic horizon is generally absent from agriculture soils because tilling e.g. plowing, buries organic matter. Why is an organic horizon generlly absent in desert soils?