Silver sesame tells you that the formation of apple yield is mainly composed of three parts: flower number, fruit setting rate and single fruit weight. The number of flowers and the weight of single fruit have been solved in fruit tree cultivation techniques, and the fruit setting rate is greatly affected by the weather, which has become an important factor in determining apple yield. Unfavorable weather such as low temperature, rainy weather and strong wind during the flowering period of apples will cause low fruit setting rate. Therefore, in the production, measures should be taken to improve the fruit setting rate, such as preparing enough pollen for rain protection, establishing micro-spray to reduce temperature, watering before and after flowering, and prolonging the life of flowers. Apple's reduced production may lead to an increase in apple futures.

Conversely, if the apple harvest is good, it will lead to a decline in apple futures.