key cultivation techniques
1. select and use superior virus-free potato seeds, accelerating germination before seeding, and seeding in the first and middle 10-day of april.
2. thin planting appropriately, planting density for each mu should be 3500~4000 plants, or 2500~3000 plants for poor dry land.
3. deep base fertilizer application and early additional fertilizer application, and keep a proper amount of nitrogen fertilizer.
4. timely earth up and make high ridge.
5. cut seedlings before harvest for the purpose of potato skin aging.
6. timely prevent late blight.
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