Grass ash is a basic fertilizer that can provide crops with a variety of nutrients based on potassium. In addition, there are the following uses of plant ash: 1, prevention of root rot of fruit trees. Remove the earth near the root rot fruit tree, remove the rot, cover it with grass ash, and then cover the new soil. 2, control locusts. The ash was sifted. When the dew had not dried in the morning, it was sprinkled on the body of the mite and scattered once every 3-5 days. The control effect was better. 3, improve the insecticidal effect of trichlorfon. For leafhoppers, scale insects, aphids, etc., every 1/15 hectare (1 acre) uses 1.2-1.5 kg of plant ash, plus 2.5% of trichlorfon powder 0.8-1 kg. 4, store jujube. At the bottom of a clean tank or other utensils, lay a layer of 7-10 cm of ash, top layer of kraft paper or 3 layers of newspapers, according to a layer of grass ash, a layer of jujube put in order, the thickness of the upper layer of grass ash to reach 12-16 cm, Keep it in the shade. 5, moisture, flood control, disease prevention. In summer, fruit trees suffer from waterlogging and can easily cause the death of rot roots. Spreading a layer of 10 cm thick ash in the tree tray can prevent the fruit trees from being ravaged and provide potash for the fruit trees to improve the fruit quality.