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Distinguish between mixed cropping and intercropping.
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Explain the advantages of mixed cropping.
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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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