The best time to apply foliar fertilizer is during the early season when rice is growing rapidly, at the heading stage, grain filling period, and full heading. Spraying per mu (approx. 667 square meters) takes more than an hour. If applying fertilizer during flowering, it should be done in the morning before flowers open or after 4 PM to avoid damage from high temperatures and direct sunlight. There are various liquid fertilizers that can be used, including nitrogen, phosphorus, and potassium-based fertilizers, potassium dihydrogen phosphate, triacontanol, borax, silkworm feces, and human or animal urine. These materials need to be processed into a liquid form before spraying. For quick-acting fertilizers, dissolve them in 5 to 10 times their volume of water the day before application to prevent drying on the leaves. Human and animal urine should first be decomposed in a pond, while silkworm excrement should be soaked in 10 times its weight in water for 24 hours, then filtered before use. Borax should be crushed and mixed with a small amount of water to make a concentrated solution before being applied to the plants. Depending on the growth condition and symptoms of the seedlings, different fertilizers should be selected. For example, green phosphorus and poplar plots benefit from phosphorus and potassium fertilizers. A common recipe includes 0.25 grams of urea, 0.5 kilograms of superphosphate, and 0.25 kilograms of potassium chloride mixed with 60 kilograms of water. Alternatively, you can use 2.5 to 3.7 kilograms of cooked cow manure, 1 kilogram of superphosphate, and 60 kilograms of water. If the leaves appear yellowish or growth is uneven, especially in thin soil, it's recommended to apply nitrogen-rich fertilizers, combined with phosphorus for better results. Regular observation of plant health ensures timely and effective nutrient supply. It’s important to always follow proper dilution ratios and spray techniques to avoid leaf burn or nutrient waste. Applying foliar fertilizers correctly can significantly improve crop yield and quality, especially during critical growth stages. Always test a small area first if using new ingredients to ensure compatibility with your crops. Automatic Hydraulic Bollard,Automatic Rising Bollard,Automatic Telescopic Bollards,Stainless Steel Bollards Shandong Changchongyun Intelligent Technology Co., Ltd. , https://www.ccyparking.com