A watermelon absorbed an average of 3.65 grams of phosphorus throughout its life. Phosphorus can enhance the ability of roots to absorb water and fertilizers, improve the quality of the fruit and the fullness of the seed. In the absence of P, the root development is poor, the plants are small, the leaves on the back are purple, the flower bud differentiation is affected, the flowering is late, the ripening is late, and it is easy to drop flowers and “melonizeâ€, yellow fibers and lump often appear in the flesh, the sweetness drops, the seeds Not full. Remedy: Use 15-30 kg of superphosphate per acre to open the ditch, or use 0.4%-0.5% of superphosphate to leach the foliar spray. YT-T15 YT-T15 Shenzhen Sunshine Technology Co.,Ltd , https://www.yatwinsz.com