How to determine the application rate of base fertilizer for watermelon

(Nongye Zhifu Wang) The application of base fertilizer for watermelon should be comprehensively determined by taking into account the nutrient requirements of the plants, climatic conditions, soil texture and fertility, variety maturity, and other factors. The nitrogen, phosphorus, potassium, and soil organic matter content in the soil should preferably be quantitatively understood through analytical testing. The amount of base fertilizer applied is generally about 30% of the total fertilizer application, and it is mostly a mixture of quick-acting fertilizers with organic fertilizers such as barnyard manure and cake fertilizer. Per mu, 2000 to 3000 kg of manure can be used as base fertilizer.