The culture soil should be finely broken and loose, and the seeds should be evenly scattered on the culture soil. After sowing, it should be covered with a thin layer of soil, and pay attention to heat preservation and moisture retention. Generally, buds appear 2-3 days after sowing. Thinning was carried out about 2 weeks after sowing to remove weak seedlings and high foot seedlings. The topdressing period is generally concentrated in the first and middle of June, from late July to early August, and from late August to early September. When topdressing, keep away from yam plants as far as possible. Generally, topdressing is applied in the middle of two lines to avoid burning roots and seedlings. For the plots planted, the land shall be turned over in the autumn of the first year. After weathering in winter, the soil shall be fully matured. In the spring of the next year, combined with soil harrowing, organic fertilizer shall be properly applied, calcium superphosphate and plant ash shall be mixed, and then the 1 gallon nursery pots soil shall be harrowed. The best depth of intertillage is easy to be shallow in the early stage and deep in the later stage. Manual weeding is the best, and mechanical or chemical weeding is not suitable. The cultivation of heading lettuce in summer needs shade and rain proof, especially the seedling raising in summer. Combined with the prevention and control of other diseases, the harvest time should be early rather than late, especially in spring and summer. It is easy to bolt after harvest, and the leaf ball is easy to rot, reducing the quality. The requirement of light intensity for heading lettuce is medium, and too strong or too weak is unfavorable to its growth. Mainly through high-pressure water spray into the root directly. Rock wool cultivation is relatively more demanding. Rock wool that can be transplanted plants can be done in advance before subsequent maintenance work can be carried out. Compared with the traditional cultivation method, soilless cultivation has many advantages. Whether growers choose this method depends on their own needs, and the investment is relatively higher. Lettuce seedlings are about 30 days old, and can be planted when there are 6 real leaves, with a row spacing of 14 cm × 18 cm. 50 kg of bio organic fertilizer shall be applied to the settled soil. Root protection with soil shall be carried out during planting, and root setting water shall be poured in time. Watering shall be based on the principle of rather dry than wet, and the 25 gallon pots soil shall be wet. According to the weather and soil moisture after slow seedling, the cultivation field needs a seedling bed of 20-30 square meters. Lettuce is a very delicious vegetable, which is indispensable for cooking or hot pot. Base fertilizer can continuously improve the nutrition required for production and growth for a long time. It is recommended to apply a large amount of rotten organic fertilizer, and topdressing timely and reasonably according to different stages of lettuce growth to speed up its growth and development. One month after planting, the young plants have survived slowly and produced new branches. Sufficient water and nutrients must be given. At this time, quick acting chemical fertilizer can be applied, with 8-10kg urea per 667 square meters or 10-20kg ternary compound fertilizer. Water the asparagus once after the asparagus is full of seedlings to promote the absorption of fertilizer by asparagus. After more than a month of growth, there will be a peak of stem pumping before and after the beginning of autumn, and then enter the vigorous long-term growth of autumn. The best application period is the branching period before flowering, that is, the middle of July. Top dressing should be applied again about 5 days before the first flowering of soybean. 75-112.5 kg of urea can be applied per hectare, and 75-105 kg of potassium fertilizer can be applied appropriately according to the seedling situation. Big cherries are watered every year, hard core water, post harvest water, frozen water and so on. In general, when entering the hard core stage, the water content at 19 ~ 30 cm of the soil layer should be controlled at least more than 60%. Cover the surface of the flowerpot with a layer of film. Plastic bags and plastic wrap in our home can seal the 10 gallon plant pots well, and the edges can be tied with thin ropes to avoid air permeability Therefore, raising flowers can reflect a person’s character and temper. If we like raising flowers, why don’t we improve a level on the basis of raising flowers, that is, raising bonsai, a bonsai that can bear fruit. When spring comes, it will sprout and be planted. When burying seedlings, the bottom shall be padded with thin soil, the root shall be spread on the inclined soil surface, the fine soil shall be buried at the root to ensure that the root can see the soil, and the outer layer shall be covered with 40 cm thick soil. The plant blooms in spring, with meat spike axillary, dioecious, male flowers slightly erect, female inflorescences slightly drooping when the nutritional conditions are good, flowers yellow, small beads, and small berries, mostly orange red or yellow.
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