Q. The good balance in the pore spaces between sand and clay gives a supply of

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Q. Which horizon contains many loose pieces of rocks, broken off from the parent rock below by weathering?

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Q. The amount of water trapped in pore spaces is known as

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Q. The removal of soluble minerals and organic matters from the top soil by rain water is known as

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Q. The amount of air present in a soil is known as

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Q. In which soil the nutrient are in short supply?

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Q. Little vegetation survives in the hot deserts of Sahara and Middle east due to

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Q. How many basic constituent is found in soil?

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Q. How carbon dioxide is absorbed in the leaves of higher plants?

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Q. Name the elements of biotics?

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Q. What is eco-system?

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Q. Quartz breaks down into

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Q. The sub layer is known as

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Q. Which layer of soil is the darkest part of the soil profile?

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Q. The gaps between minerals particles are known as

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Q. A soil with what percentage of clay have a clayey texture?

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Q. How are mineral particles formed?

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Q. The type of soil formed under the tropical rain forest is known as

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Q. What are the four basic constituent in soil?

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Q. The ability of soil to supply nutrients to the plants is known as

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