Why do you say that the discovery of "white" willow leaves indicates rainy weather in the future?

Willow with flexible branches and narrow leaves. Deciduous trees or shrubs. Willow branches are very adaptable to the environment. In spring, as soon as the willow branches are buried in the soil, they will soon make a living independently. In addition, willows grow fast, regardless of place, everywhere is home. Therefore, willows are widely distributed and can be seen everywhere, especially in the south, almost in front of the house, but at the lakeside, riverside and roadside, willows are crying and fluttering with the wind. The broad masses of working people predict the warming speed of early spring weather by observing the early and late germination date of willow trees, and guide agricultural production. In summer, they also observe willows.

Ten phenomena such as "whitening" predict rainy weather and rainfall and fight natural disasters. ? Winter passed, spring came to the earth, and the temperature gradually rose. At this time, the willows also began to sprout. First, the scales of willow branches split, and then the green tips appeared. The masses said that "the willows germinate early and the temperature is high in early spring". According to this experience, it is effective to observe the early and late time of willow germination and predict the spring temperature. The forecasting methods and indicators are as follows: the germination time of willow is compared with the average date of the whole year. If it is early, the temperature will rise quickly and the temperature will be high in spring, otherwise it will rise slowly and the temperature will be low.

In summer, willow leaves droop, and full of green is full of vitality. But at this time, if the willow leaves are found to be "white", it indicates that there will be rain in the future. Why do willow leaves turn white? The results showed that the leaves of willow did not change from green to white, but were generally upside down before rainy days. One side of willow was green in the morning, while the opposite side was light green.

Compared with green, light green is a little lighter and looks a little white. Therefore, there is a folk saying that "the willows in Ye Er turn white and it will rain". As for why the willow leaves will reverse before the rain, it is still difficult to explain, and further understanding is needed. ? In July and August, if it is found that there is a red beard one or two inches long at the root of the willow tree, and the tip of the beard is white, this sign indicates that it will be rainy next month, which is what the masses say, "There is a red beard at the root of the willow tree, and it will be rainy in the future."