Ask the following Yunnan flue-cured tobacco planting methods?

. Flue-cured tobacco planting: select excellent varieties; Choose a flat, fertile, weathered plot to raise seedlings. Strong seedlings first strengthen roots, and strong roots first strengthen soil. Seedling age is 70-90 days, and nutrient trace element liquid fertilizer and bactericide are sprayed once every half month. After three times, when the tobacco seedlings grow to 7-9 leaves, they can be transplanted into the field. When transplanting, water the soles of your feet first, and then plant seedlings. Flue-cured tobacco likes light, and the row spacing should not be too narrow when planting tobacco. Generally, the row spacing is 1.2 m, and the plant spacing is 0.5 m. Tobacco leaves are afraid of waterlogging, and there can be no water in the field. 2. Field management: It is suggested that trace element fertilizers should be reasonably supplemented during the tobacco growing period, and fungicides should be sprayed once every half month to prevent tobacco diseases and element deficiency diseases. Insecticides should be selected according to the specific situation to control tobacco pests. 3. Fertilization of flue-cured tobacco: sufficient in the early stage, moderate in the middle stage and small in the late stage, so as to achieve "base fertilizer application as the main factor, supplemented by topdressing, and topdressing according to the growth of flue-cured tobacco". Phosphate fertilizer and organic fertilizer are used as base fertilizers, and it is not recommended to continue to apply them in the later growth stage of flue-cured tobacco; According to the weather conditions, topdressing should be sprayed in dry days and applied in rainy days. No matter base fertilizer or topdressing, it should be applied evenly, and urea is not recommended.