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Question

Proper soil and seed preparation methods for the protection of crops are ___ measures.

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Solution

Preventive measures and biological control methods should be preferred for protecting crops because excessive use of chemicals leads to environmental problems.
(a)
Preventive measures include proper soil and seed preparation, timely sowing of seeds, intercropping and mixed cropping, and usage of resistant varieties of crops.
(b) Biological control method protects crops from the beginning, that is, before weeds, pests and disease tend to affect the plants.

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