Over the years, due to traditional fertilization, excessive use of chemical fertilizers, unfermented cyclists (cows, sheep, pigs, chickens, etc.), and human urine excrement and excessive use of pesticides have greatly damaged the soil structure. A large number of harmful germs are The spread of propagation in the soil has caused serious damage to various crops, reduced yields, and reduced fruit quality. According to years of continuous application of various crops (such as apple trees, peach trees, cotton, grapes, jujube, etc.), a whole set of preventive measures was concluded: For example, in diseased fruit trees, rounding within 2 to 3 feet around the roots Loop ditch, find healthy lateral roots, eradicate the infected diseased roots, use Tianwei biological fermented fertilizer 2 ~ 3 kg plus 25% of silicon magnesium fertilizer 1.5 ~ 2 kg, evenly scattered into the ring ditch, shallow cover 2 finger thick After the fine soil is covered with 3 finger thick weeds, wheat straw, etc., and sprinkle water to keep the humidity at about 60% to 70%. A protective earth mound is surrounded around the excavated area (no water is allowed to be poured into the roots of the trees). After 10 to 12 days, the spraying of foliar fertilizer is observed. After about 28 to 35 days, the leaves are obviously changed and the tree vigor gradually returns to growth. If there is an orchard with similar diseases, it may be worthwhile to compare the experiments.