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English Medium Class 9 - CBSE Question Bank Solutions

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How does intercropping differ with mixed cropping?

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Write down disadvantages of crop rotation.

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Write about three main criteria which should be considered while selecting the crops for rotation?

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Why are leguminous crops desirable in crop rotation?

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Explain various steps in hybridization of crop plants.

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Define plant breeding?

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Describe the biological method of weed control.

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Out of the following, an example of matter which can be termed as fluid is :

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Classify plant diseases depending upon their occurrence and transmission.

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Mention three different ways in which insect pests can attack the crop plant.

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Explain the methods of controlling insect pests.

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A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is :

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Give two examples of narrow leaved rabi season weed.

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Explain various methods of weed control.

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Explain various effects of weeds on crop plants.

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What are crop's pests?

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What is the advantage of using insect resistant varieties?

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Why is liquid (the hydraulic fluid) used to operate the brakes in a car?

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Distinguish between fertilizer and manure. Give suitable examples.

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Explain the mechanism of compost formation.

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