How is the planting density of watermelons of different maturity periods determined?

(Agricultural Wealth Network) For mid-season varieties, generally 400 to 600 plants are planted per mu. Early-maturing varieties have weak growth and set fruit easily, so they are suitable for close planting, with 700 to 800 plants per mu. Late-maturing varieties are suitable for sparse planting. In the same region, varieties with strong growth vigor should generally have their density reduced by about 20% compared with varieties with weaker growth. For the same variety, planting in plots with good soil fertility should have its planting density reduced by about one-third compared with planting in poor soil.