21). Which of the following is not a tropical type of soil?
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22). Match the following : A. Chernozems 1. Rich in calcium carbonate B. Black soil 2. Contains aluminium compound C. Laterite 3. Richest soils in the world D. Terra Rosa 4. Formed in limestone E. Alluvial soil 5. It is a mixture of clay, sand and silt A B C D E
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23). What do you understand by the word regur ?
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24). Which of the following is/are not the characteristics of red soils ? I. They are derived from weathering of old crystalline and metamorphic rocks II. They contain iron oxides III. They have high water retention capacity IV. They have high nitrogen content
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25). Match the following : Regions Soil Types A. Malwa Plateau 1. Alluvial B. Dharwar Plateau 2. Lateritic C. Punjab Plains 3. Red D. Western Ghats 4. Regur A B C D
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26). Which of the following is/are methods of checking soil erosion ? 1. Strip cropping 2. Contour ploughing 3. Use of irrigation and fertilisers 4. Terrace farming
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27). In which of the following ways can soil be conserved ? I. Contour ploughing II. Terracing III. Shifting cultivation IV. Crop rotation
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28). Put in descending order of area with the following soils in India : I. Red soils II. Black soils III. Laterite soils IV. Alluvial soils
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29). Consider the following statements about the soils of India : 1. High temperature during most of the year retards formation of humus 2. Soils which have humus require regular application of chemical fertilizers to remove nitrogen deficiency 3. Titanium salts in basalt impart black colour to the soils of the Indian plateau 4. Red soils are confined to the peripheral areas of the Indian plateau Which of the statements given above are correct ?
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30). ����.
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