Reservoir of Minerals

Q. The majority of the nutrients that are essential for the growth and development of plants become available due to

1. Supply of fertilizers to plants periodically
2. Weathering and breakdown of rocks
3. Percolation of rainwater into soil
4. Microbial action on atmospheric gases

Q. Formation of soil from parent rock occurs through a process called __.

Q.

Identify the correct statements related to soil

A. Soil acts as a matrix and stabilizes the plant

B. Soil is the source for both inorganic and organic solutes

C. Soil holds water and supplies air to the roots

D. Soil acts as a reservoir of gasses

1. A & C

2. B & C

3. C & D

4. A, B, C and D

Q.

The preservation of topsoil is important because

1. It contains the minerals necessary for plant growth

2. It holds water and it contains organisms that break down organic debris

3. Most roots are located in the topsoil

4. All of the above