Developed from a fertilized egg in the embryo sac. The normal fruit of an apple having 5 ventricles per fruit and 2 seeds per ventricle. In the fruit development process, the seeds secrete hormones to stimulate the growth of flesh, so good pollination and fertilization, full and full seeds, fruit shape, plump flesh; On the contrary, the seed is poorly developed or seedless, and the flesh is sunken and thin to form deformed fruit. Therefore, it is necessary to configure pollination tree and improve pollination. Soil requirements are not strict, clay, sandy soil, loam can be, but to the deep soil layer, loose fertile soil sandy loam is the best. Soil layer shallow, gravel too much sticky heavy soil, must be improved before planting. The range of PH is 5.3 -- 8.2, and the optimum is 5.4 -- 6.8. Lower than 5.4, too acid, prone to boron deficiency, calcium deficiency caused by fruit shrinkage disease and bitter pox disease; Higher than 7.8, alkali, easy to appear iron deficiency, causing leaf greening.