In autumn, the ground temperature gradually declines, the roots of vegetables are severely aged, and the absorption of nutrients is hindered. In late autumn, the vegetables are in a period of prosperous growth and are prone to calcium deficiency. Should arouse the attention of vegetable farmers. Control measures to control the amount of fertilizer, should not be too much with a fertilizer, especially with chlorinated fertilizers such as ammonium chloride and potassium chloride; timely irrigation, to prevent soil drought; to spray calcium, calcium chloride and calcium nitrate can be used As spray fertilizer, the concentration of 0.3% ~ 0.5%, usually sprayed once every 7 days or so, even spray 2 ~ 3 times can be effective. It should be sprayed on the upper and lower leaves of the inflorescence 2 to 3 when the tomato blossoms. The Chinese cabbage sprays calcium when it begins to enter the ball stage, and adding auxin substances such as naphthalene acetic acid when spraying calcium can promote the absorption of calcium. Concrete formula: 0.7% calcium chloride plus naphthalene acetic acid 50ppm, spraying after mixing; applying calcareous fertilizer (such as gypsum, superphosphate, calcium magnesium phosphate fertilizer), calcareous soil generally do not need to use calcium fertilizer alone, usually when applying phosphate fertilizer Has brought calcium. N95 Dust Mask,N95 Protective Dust Mask,Protective Face Mask For Germs,Face Mask N95 Respirator KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com