If the cultivation of the same or the same family of crops in the same field for many years leads to a decline in yield, deterioration of quality, infestation of diseases and pests, deterioration of fertility, and the like, this phenomenon is called a continuous cropping obstacle. Continuous crop damage is the most common and most difficult to control. There are many reasons for this, mainly including the following four factors: First, the crop's autotoxicity. Some crops can release some substances through leaching of the aboveground parts, root exudation, and decomposition of crop residues, and have an inhibitory effect on the growth and development of the same pod or sorghum or the same crop. This phenomenon is called autotoxicity. Second, there are fewer beneficial microorganisms and more harmful microorganisms in the soil. As a result of continuous cropping, a special soil environment has been formed, which has inhibited the growth and reproduction of beneficial microorganisms such as Azotobacter, Rhizobium, photosynthetic bacteria, actinomycetes, nitrifying bacteria, ammoniated bacteria, and mycorrhizal fungi, and has caused a large number of harmful microorganisms to grow. It will change. Third, the nature of the soil deteriorated, and secondary salinization and soil acidification were serious. In order to unilaterally pursue high yields, large amounts of chemical fertilizers and unfamed animal feces, human urine excrement, etc. are applied in large quantities, resulting in an excessive amount of salt in the soil. Fourth, nematode damage. Nematodes are crop parasites that mainly damage the roots of crops, affect their normal growth, and are difficult to control. Crops continuous cropping hazard prevention and control: First, fertilization: soil testing formula, balanced fertilization, regulation of nutrition, mainly organic fertilizer, organic fertilizer and inorganic fertilizer combined. Second, management: Intercropping, superior grafting. Third, cultivation: soil disinfection, drug treatment bacteria. Organic Sencha Green Tea,Sencha Leaves,Organic Sencha Green Powder,Organic Sencha Green Leaves SHAOXING ROYAL TEA VILLAGE CO.,LTD , https://www.yccmatcha.com