First, light nitrogen fertilizer. Excessive nitrogen fertilizer will cause the stems and leaves to go mad and consume a lot of nutrients. When the fruit is later expanded, nutrient supply will be insufficient, leading to small fruit and a decline in yield.

Second, more phosphorus and potassium fertilizer. Phosphorus fertilizer has the effect of loosening the soil and promoting the differentiation of flower buds. Potash fertilizer can promote the growth of sweet potato stalks and fruit enlargement.

Third, re-applied organic fertilizer. Tuber crops such as sweet potato and potato strongly favor organic fertilizers, and their organic fertilizers have stable effects and sufficient stamina, which is unmatched by chemical fertilizers.

Fourth, clever foliar fertilizer. Ten days before the beginning of fruit enlargement, the surface of the leaf must be sprayed with potassium dihydrogen phosphate once.

Fifth, use biological bacteria fertilizer. Biological bacteria can play an extremely unique role in disease resistance and soil improvement.

Complete Greenhouse

A greenhouse(also called hothouse)is a building or complex in which allow for greater control over the growing environment of plants. Depending upon the technical specification of a greenhouse, key factors which may be controlled include temperature, levels of light and shade, irrigation, fertilizer application, and atmospheric humidity. Greenhouse may be used to overcome shortcomings in the growing qualities of a piece of land, such as a short growing season or poor light levels, greenhouses are often used for growing flowers, vegetables, fruits, transplants and seedlings. Greenhouses can be divided into glass greenhouses and plastic greenhouses. Plastics mostly used are polyethylene film and multiwall sheets of polycarbonate material, or PMMA acrylic glass. Commercial glass greenhouse are often high-tech production facilities for vegetables or flowers. The glass greenhouse are filled with equipment such as screening installations, heating, cooling and lighting, and may be automatically controlled by a computer.

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