Because there are many kinds of onions, different spheres are related to the maturity in the morning and evening. Generally, the flatter the ball, the earlier it matures, and the yield of different varieties varies greatly. Early-maturing flat-stubble varieties generally yield about 4,500-5,500 kg per mu, while middle and late-maturing varieties generally yield about 5,000-5,500 kg per mu, and the economic benefit of planting is between 3,000-6,000 yuan per mu. Therefore, when users choose seeds, they should not only look at the price, but also look at the quality.