1Selected seeds were selected based on virus-free seed potato, such as Zaidabai, Dongnong 303, Jinyin 8 and Eugene 88-5. The 2 kinds of potatoes were treated with representative and disease-free excellent virus-free seed potatoes, and they were planted for one week before sowing. The cutting knife used for cutting the tubers was sterilized with 5% of the children. Each potato block should be more than 25 grams to ensure that each potato block has 1-2 buds. Conditional farmers can use small whole potatoes to sow. The cultivation of potato plots in 3 selected areas requires the selection of loose soil and well-drained land plots, and the implementation of three or more crop rotations. The former crop is dominated by corn bran, followed by soybean bran, mixed grain crops, bogey beets, and vegetables. (4) Land-planting potato plots are deep-falling in autumn and reach a depth of 23-25 ​​cm. Conditional plots can be used for deep-soiled soil preparation by all-around deep-soiled site preparation machines, and all of them have good ridges to reach the sowing state. 5 Organic Fertilizer Hazard Hazard Content 8% or more High-quality fertilizer 15-20 tons, diammonium phosphate 225 kg, potassium sulfate 75 kg or the use of equal amount of compound fertilizer, a deep-rooted base fertilizer, and do seed fertilizer separation. 6 sowing 6.1 sowing time When the temperature is stable through 6-7 °C, timely sowing. In general, sowing will begin on April 25. All broadcasts will be completed before May 5. 6.2 The sowing method uses mechanical sowing or artificial seeding. Request to sow, cover soil and suppress continuous operations. 6.3 Density Early-maturing varieties and high-fertility plots should be properly planted, and late-maturing varieties and relatively low-fertility plots should be appropriately planted. The average hectare is 83,000-100,000 strains, and the seeding volume is 1800-2100 kg. 7 Field Management 7.1 Check field fills seedlings and conducts field seedlings after seedlings to ensure seedlings. 7.2 Cultivate and weed the potatoes and sow in half a month after planting the potatoes. The first time after the emergence of the seedlings, the height of the seedlings was 2 cm deep, ie, the head of the soil. The second time, when the seedling height was 10 cm, the soil was thickened and the soil was met. The last time the seedlings were squatted before the budding was applied. Landscaping to take a big grass. 7.3 When the height of the top-dressing seedlings is 10 cm high, the combined haze will be used twice to recover 150 kg of urea. After re-discovering the defertilizer, potassium dihydrogen phosphate may be sprayed. 7.4 Diseases, pests and weed control 7.4.1 Underground pests shall be combined with fertilizer before sowing, and 48% of 2200 ml of Lesotho's EC may be used in hectares, mixed with fine sand or fertilizer to control underground pests such as golden worms and cockroaches. 7.4.2 After chemical weeding sowing, hectares are closed with 1500 g of 10% acetochlor and 20 kg of water for 450 kilograms of water. 7.4.3 Disease prevention Late blight: In the early stage of potato late blight, foliar spraying was performed with 72% DuPont Kelu 800x or Kimreda Meer 500 times, spraying once every 5-7 days. Virus disease: all potato virus-free seed potatoes. 8 Harvesting 8.1 Harvesting Harvesting is recommended during the ripe period of maturity. It is forbidden to harvest on rainy days so as to avoid dragging. 8.2 The harvesting method is performed using mechanical harvesting or manual harvesting. Artificially broken ridges are required to be ridiculed, not to run away, not to be paralysed, to pick out the light, and to pile up and cover the soil in the field to prevent it from drying out into sweet potatoes.
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