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Tamil Nadu Board of Secondary EducationHSC Science Class 12

Give an account of the properties of soil. - Zoology

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Question

Give an account of the properties of soil.

Answer in Brief

Solution

1. Texture of soil -The texture of soil is determined by the size of the soil particles. The types of soil include sand, silt and clay on the basis of their size differences.

2. Porosity - The space present between soil particles in a given volume of soil are called pore spaces. The percentage of soil volume occupied by pore space or by the interstitial spaces is cal Ted porosity of the soil.

3. Permeability of soil - The characteristic of soil that determines the movement of water through pore spaces is known as soil permeability. Soil permeability is directly dependent on the pore size. Water holding capacity of the soil is inversely dependent on soil porosity.

4. Soil Temperature - Soil gets its heat energy from solar radiation, decomposing organic matter, and heat from the interior of Earth. Soil temperature effects the germination of seeds, growth of roots and biological activity of soil-inhabiting micro and macroorganisms.

5. Soil water - In soil, water is not only important as a solvent and transporting agent, but also maintains soil texture, arrangement and compactness of soil particles, making soil habitable for plants and animals.

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Major Abiotic Components or Factors
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Chapter 10: Organisms and Populations - Evaluation [Page 179]

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Samacheer Kalvi Biology (Zoology) [English] Class 12 TN Board
Chapter 10 Organisms and Populations
Evaluation | Q 27. | Page 179
Samacheer Kalvi Biology (Zoology) [English] Class 12 TN Board
Chapter 11 Organisms and Populations
Evaluation | Q 27 | Page 195
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