Potatoes are grown widely in some areas of China. The economic benefits of potatoes are also high. How to fertilize them is summarized as follows: 1. Apply it when sowing potatoes, use superphosphate or apply a small amount of nitrogen fertilizer as seed fertilizer. However, it should be noted that nitrogen and phosphorus fertilizers cannot directly contact seed potatoes. In many regions, there is a habit of seeding yam ash, which also acts as a seed fertilizer in addition to preventing disease. 2. It is mainly organic fertilizer, and the general dosage is 22.5-45 tons per hectare. The application method depends on the amount and quality of the organic fertilizer. A small amount (15 tons per hectare) of high quality organic fertilizer can be applied to the seed canopy along the seeding channel or in a hole, and then covered with soil. When the amount of crude fertilizer is heavy, it should be applied and ploughed into the soil. Phosphorus and potassium fertilizers should also be used as base fertilizers. Screw Air Compressor,Small Screw Air Compressor,Small Rotary Screw Air Compressor,Screw Type Air Compressor Hangzhou Zhongju air separation equipment manufacturing Co., Ltd , https://www.hzzjkfzz.com