One is to fertilize the soil. Generally, more than 4,000 kg of organic fertilizer is applied per mu, 25 kg of ammonium phosphate or 50 kg of compound fertilizer. Deep plowing and leveling are done. The width is 100 centimeters wide, 15 centimeters high and 50 centimeters long.
The second is appropriate sowing. Usually in the middle and late March to take direct broadcast, every pod of 2 to 3 lines, pods dig inside, hole 15 cm, sowing 3 to 4 seeds per hole, after sowing cover the cover film. When the seedlings emerge from the soil, they must break the membrane in time to prevent high-temperature burns. When 3 to 4 true leaves are used, the seedlings should be seeded once, and 5 to 6 true leaves are to be seedlings. In the initial stage, the ball is poured once every 5 days, and combined with 20 kg of ammonium sulfate per acre, 20 kg of potassium sulfate for 2 to 3 times per acre, and potassium dihydrogen phosphate for fertilization 3 to 4 times at a later stage.
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