In Wu County, farmers follow a five-year crop rotation system that includes spring flowers, vegetables, corn, green vegetables, radishes, and spinach. The average yields per mu (approximately 0.067 hectares) are as follows: about 1,000 kg of cauliflower, 700 kg of corn cobs, 1,200 kg of green corn, 4,000 kg of radishes, and 600 kg of spinach. This diversified planting pattern ensures stable production and efficient land use.
The planting schedule is carefully planned throughout the year. Spring flowers are sown in mid-November, transplanted in late February, and harvested by late April. Corn is planted in early April, with harvest taking place in mid-July. Green vegetables are sown in mid-July and gradually harvested from mid-August. Radishes are sown in mid-August and available for sale from late October to early November. Spinach is broadcast in early November and can be sold from mid-January to the following month.
For spring flowers, high-quality, cold-resistant Japanese varieties like "Snow Cap" are selected. Seedlings are raised in a small greenhouse using nutrient-rich soil. Before transplanting, the field is prepared with 2,500 kg of organic fertilizer and 50 kg of compound fertilizer per acre as base fertilizer. Transplanting is done on sunny days, with rows spaced 1.8 meters wide, 30 cm apart, and plants placed 45 cm apart. A small arch shed is used for insulation after planting. After establishment, 10 kg of urea and 50 kg of ammonium bicarbonate per acre are applied, along with 25 kg of compound fertilizer during the ball period. Maintaining soil moisture and proper drainage is essential throughout the growing season.
Corn varieties such as Suyinhao No. 1 are preferred for their early maturity and high yield. Seeds are covered with fine soil and plastic film, and a small shed is erected for protection. When 75% of the seedlings emerge, the mulch is removed. Seedlings are transplanted 5 days before planting, when they have 2 leaves and 1 heart, typically after 20–25 days. In a 1.8-meter-wide bed, four rows are planted with varying spacing: 60 cm between large rows, 40 cm between small rows, and 30 cm between individual plants. Base fertilization includes 2,000 kg of manure, 50 kg of compound fertilizer, and 30 kg of superphosphate per acre. After transplanting, 10 kg of urea is applied, and an additional 25 kg of urea is used during the tasseling stage to promote ear development.
For green vegetables, heat-resistant dwarf varieties like "Dwarf Green" or "Dwarf Hybrid 1" are chosen. After corn harvest, the land is plowed and mixed with 1,500–2,000 kg of manure per acre. Each acre is sown with 1–1.5 kg of seeds, and the soil is watered one day before sowing. A shade net is placed over the surface to retain moisture. During the growth phase, safe pesticides like CPT and Ca-killer are used to control pests such as cabbage caterpillars, diamondback moths, and aphids.
Radish cultivation uses the high-quality variety "Wuza No. 3." The beds are 2.1 meters wide, including a 30 cm ditch. Four lines are planted per bed, with 30 cm between holes, and 4–5 seeds per hole. After sowing, fine soil is used to cover the seeds, and a thin layer of straw is added to prevent erosion from heavy rain. The straw is removed once the seedlings emerge. At the true leaf stage, seedlings are thinned to one per hole. Base fertilization includes 2,500 kg of organic manure and 25 kg of compound fertilizer per acre. During the "breaking the belly" stage, 1,500 kg of diluted human waste is applied, and 10–15 kg of urea per acre is used during the "off shoulder" period.
For spinach, round-leaved varieties that are less prone to bolting are selected. Seeds are sown in open fields at a rate of 5–7 kg per acre. After sowing, diluted human waste is poured, and a layer of straw is placed on top to maintain moisture. The straw is removed once the seedlings emerge. Thirty days after sowing, 30 kg of urea per acre is applied to promote healthy growth. This comprehensive approach ensures consistent yields and sustainable farming practices in Wu County.
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