How to topdress summer corn?

Chrysanthemum has a well-developed root system and strong fertilizer absorption capacity, making it a fertilizer-loving plant. In addition to applying base fertilizer, you also need to pay attention to top dressing. When top dressing, you should not use too much nitrogen fertilizer in the early stage to prevent excessive growth and easy lodging of plants in the later stage. Fertilizer should be concentrated in the mid-term to promote root growth and increase flowering branches. For the first top dressing, after the chrysanthemums survive, 400 kilograms of human and animal manure water should be applied every 667 m2 to promote seedling growth. For the second time in late June, when the plants branch, apply 500 to 700 kilograms of slightly thicker human and animal manure water per 667 m2. For the third time, when the chrysanthemums are budding in late September, apply 5 kg of ammonium sulfate per 667 m2. You can also use superphosphate as top dressing outside the roots, or prepare a 2% solution to spray the leaves.