Farmers in Wu County follow a five-year crop rotation system, planting spring flowers, vegetables, corn, green vegetables, radishes, and spinach in a well-organized sequence. The average yields per mu include 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, ensuring a balanced and sustainable agricultural cycle.
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 and harvested in mid-July. Green vegetables are sown in mid-July and harvested in batches from mid-August. Radishes are sown in mid-August and available from late October to early November. Spinach is broadcast in early November and sold in the market from mid-January to the following month.
For spring flowers, farmers choose high-quality, cold-resistant Japanese snow-capped varieties. Seedlings are grown in small sheds with nutrient-rich soil. Before transplanting, the field is prepared with 2,500 kg of organic fertilizer and 50 kg of compound fertilizer as base fertilizer. Transplanting is done on sunny days, with spacing of 1.8 meters wide, 30 cm between rows, and 20–25 cm depth. Plants are spaced 45 cm apart, and small arch sheds are used for insulation after planting. After establishment, 10 kg of urea and 50 kg of ammonium bicarbonate are applied per acre. During the ball period, 25 kg of compound fertilizer is added per mu. Soil moisture is maintained, and proper drainage is ensured.
Corn varieties like Suyinhao No.1 are selected for their early maturity and high yield. After sowing, fine soil and plastic film are used to cover the seeds, along with a small shed for protection. When 75% of the sprouts emerge, the mulch is removed. Seedlings are transplanted 5 days before planting, when they have two leaves and one heart (around 20–25 days old). In a 1.8-meter-wide bed, four rows are planted with large and small spacing—60 cm between rows, 40 cm between plants, and 30 cm within the row. Base fertilizers include 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 another dose is given during the 7-leaf stage to promote growth. During the large bell-mouth period, 25 kg of urea per acre is used to enhance 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. Seeds are sown at 1–1.5 kg per acre. A day before sowing, the field is watered. After sowing, shade nets are used to keep the soil moist. Pesticides such as CPT and Ca-killer are used to control pests like cabbage caterpillars, diamondback moths, and aphids.
Radishes are sown using the Wuza No. 3 variety, known for its quality and disease resistance. Beds are 2.1 meters wide (including 30 cm furrows), with four rows per bed, 30 cm between holes, and 4–5 seeds per hole. Fine soil is used to cover the seeds, and a thin layer of straw is placed to prevent erosion from heavy rain. The straw is removed once the seedlings emerge. At the true leaf stage, seedlings are thinned out, leaving one plant per hole. Base fertilizers include 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, followed by 10–15 kg of urea per acre during the "off shoulder" period.
Spinach is sown in open fields using round-leaved varieties that resist bolting. Seeds are sown at 5–7 kg per acre. After planting, diluted human waste is poured over the soil, and straw is used to retain 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 efficient use of resources, maximizes yields, and maintains soil fertility over time.
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