Yellowing disease is difficult to cure. Once infected, the tree can only be cut to avoid immunization. Although soil fertilization can not be cured, it can effectively enhance the disease resistance of citrus. New garden acid control alkali. Adjust soil acidity. An acidic conditioner or acidic fertilizer is applied to the pH 7 soil to adjust the pH of the soil. Carbon fertile soil. Through deep turning, adding organic matter, supplementing fertilizers and other means to improve soil texture, permeable water, water and fertilizer. Intercropping between young gardens to enhance micro ecological stability. Natural grass, no-tillage; regularly mowing coverage, buried around the tree disk; 30 cm crown line outside the intercropping leguminous crops, increase soil microbial activity, improve the ecological balance of the root zone and resistance. In adult parks, deepen the hole. Deep plowing and expansion points are advocated in combination with soil acidification control and soil improvement. Generally after the autumn shoots are stopped, they are carried out outside the drip line outside the canopy, with a depth of 50-80 cm and a width of about 40 cm. Cut the roots in the ditch (holes), layer backfill the soil conditioner such as green manure, bio-organic fertilizer, biochar, etc., fill the middle layer of the topsoil when backfilling, and put the upper layer in the heart and soil. Through year-by-year overturning, soil compaction is reduced, soil water, fertilizer, gas, and heat are coordinated, and the rejuvenating root system is renewed to prolong the full fruit period. Grass cultivation. In autumn and winter, inter-planted ryegrass, broad beans, and peas are dominant. In the spring, species of Pythium variegate, Hesperidin, and alfalfa are planted. The intercropping crops are timely mulched, buried or covered in tree trays to increase soil organic matter and soil microorganisms. Cover and earth. Before the advent of high temperature or dry season, cover the straw or wheat straw, wheat straw, corn stalks, green manure, weeds, etc., covering the thickness of 10-20 cm, and keep a distance of 30-50 cm from the main trunk to achieve soil cooling. Moisturizing effect; when cultivating or deep-falling in autumn, the rotted cover is buried in the soil to increase soil organic matter and increase soil permeability. Acrylic Foam Tape,Vhb Tape Waterproof,Adhesive Acrylic Foam Tape,Acrylic Foam Mounting Tape Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.jerrytapes.com