I. Watermelon sitting about a week, dig a hole 10 centimeters away from the main root, 50 grams of fat per cake, seal water and water. Second, in the vigorous growth of watermelon, foliar spraying 0.5% potassium dihydrogen phosphate solution 50 kg, once every other week, even spray three times. Third, take 500 grams of stevia, 10 kilograms of soybeans, add 25 kilograms of water, soaked until the soybeans are inflated, and then boil in the pot until the leeches dry. When the watermelon is sitting in the melon, the soybean particles that infiltrated the stevia are applied to the roots of the watermelon, and 50 g per plant is applied and watered once every 6-7 days. China Agricultural Network Editor