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Evaluation · Q30

Q.Give an account of the properties of soil.

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Step 1. Texture of soil is determined by the size of the soil particles; soil types such as sand, silt and clay are distinguished by their particle-size differences.

Step 2. Porosity is the percentage of soil volume occupied by pore spaces (the interstitial spaces between soil particles).

Step 3. Permeability of soil is the characteristic that determines how water moves through the pore spaces; it depends directly on pore size, while water-holding capacity is inversely related to porosity.

Step 4. Soil temperature comes from solar radiation, decomposing organic matter, and heat from the Earth's interior, and it affects seed germination, root growth, and the biological activity of soil-dwelling organisms. …

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