Variety selection of four nine dishes. Deeply ploughing the ground, combined with the land preparation of 2000 kg of organic fertilizer per acre, for sputum, squat width 1.2 m, filling the bottom water, sowing when suitable, generally using ditch, line spacing 25 cm, 0.4 kg per mu The next kind should be even, and the cover should be covered with 0.5 cm thick fine soil. When the seedlings are unearthed, it is necessary to plant the seedlings and seedlings at a distance of 18 cm. After the seedlings are planted, the water is poured once, and at the same time, 15 kg of urea is applied per mu. When the ground sees dry and timely wet, it will cultivate in time, increase soil permeability and promote plant root growth. When the plants begin to bud and convulsion, they should be poured with a simmering water, and at the same time, a second top dressing is applied, and 25 kg of urea per acre is applied to promote the elongation of the leeks and the hypertrophy of the leaves. After the main harvest, the water should be poured once, while chasing potassium dihydrogen phosphate 20 kg / mu, urea 20 kg / mu. When there is a small amount of newly opened small flowers in the upper part, the main sputum reaches the commercial trait, and it should be harvested in time.
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