Soil

Q.

What are the characteristics of forest soil?

Q. Which characteristic(s) determine(s) the percolation and water holding capacity of the soils?

1. Soil composition
2. Grain size of the soil
3. pH of the soil
4. Soil aggregation

Q. Various characteristics of soil such as composition, grain size and aggregation determine the

1. water holding capacity of soil
2. percolation
3. temperature
4. both a and b

Q. Carefully observe the following figure:


a. Name the technique shown in the figure and the scientist who demonstrated this technique for the first time.

b.Name at least three plants for which this technique can be employed for their commercial production.

c.What is the significance of aerating tube and feeding funnel in this setup?

Q. The important characteristics of soil are

1. Terra rossa – most suitable for roses
2. Chernozems – richest soil in the world
3. Black soil – rich in calcium carbonate
4. Laterite – contains aluminium compound

Q. Which of the following statement(s) is/are incorrect with regard to soil as an abiotic factor?

1. Soil is a rich source of nutrients and minerals useful for photosynthesis.
2. Grain size, soil composition and the type of organic matter determine the quality of soil.
3. Soil should be able to retain or hold water to be able to support plant life.
4. The type of fauna in an area is never determined by the type of soil.

Q. Give the distribution on alluvial soil, black soil, red soil, yellow soil, lateritesoil, arid soil.

Q. Write One Word :
The natural environment of a plant or animals species , where it lives multiplies, and trives naturally

Q. Which of the following statement(s) is/are incorrect with regard to soil as an abiotic factor?

1. Soil is a rich source of nutrients and minerals useful for photosynthesis.
2. Grain size, soil composition and the type of organic matter determine the quality of soil.
3. Soil should be able to retain or hold water to be able to support plant life.
4. The type of animals in an area is never determined by the type of soil.

Q. The type of animals thriving in a particular area is not dependant on the type of vegetation in that area.

1. True
2. False

Q. Various characteristics of soil such as composition, grain size and aggregation determine the

1. water holding capacity of soil
2. percolation
3. temperature
4. both a and b

Q. The important characteristics of soil are

1. Soil composition
2. Grain size
3. Presence of organic matter
4. All of these

Q. Which characteristic(s) determine(s) the percolation and water holding capacity of the soils?

1. Soil composition
2. Grain size of the soil
3. pH of the soil
4. Soil aggregation

Q. In India, grasslands occur in area

1. 18%
2. 23%
3. 5%
4. 13%

Q. Mild grazing in grasslands

1. Stimulates growth of grasses
2. Arrests growth of grasses
3. Destroys vegetation
4. Retards growth of grasses

Q. The water content of soil is defined as the ratio of

1. Volume of water to volume of given soil
2. Volume of water to volume of voids in soil
3. Weight of water to weight of solids of given mass of soil
4. Weight of water to weight of air in voids

Q.

Which soil covers the eastern part of the peninsula. Give two features of this soil

Q. Give three important reasons why soil is essential for living organisms.​

Q.

The plants growing in a particular area are related with:

1. Other plants of that region

2. Soil of the region.

3. Available light

4. All of the above

Q. The soil near the surface is usually darker, than the soil about one meter down. This is because the topsoil is

1. Young and wet
2. Richer in organic matter
3. Richer in Ca and Mg
4. Dry

Q. Continuously water-logged soils are disadvantageous for plant growth. Why?