Summer ploughing involves ploughing fields deep in the summer to destroy weeds and pests by exposing them to high temperatures and sunlight, which can kill them.
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Intercropping helps in weed control by creating competition for weeds, making it harder for them to establish and grow.
Preventive methods for weed control include proper seed bed preparation, timely sowing of crops, intercropping, and crop rotation.
One mechanical method of weed control mentioned is mechanical removal.
Bio-agents like blue-green algae for biofertilizers and neem leaves or turmeric for bio-pesticides provide natural alternatives for nutrient supplementation and pest management while minimizing environmental impact.