Is Xiao Xia a fool? Xiao Xia was not carried away.

This is not the first day of summer. Enter the dog days. "On the summer solstice, the head of the three gengzi falls", which is the basis for establishing the first autumn. This means that it begins to decline from summer to the third Geng day in the future. A little summer heat is a little summer heat, which means the weather is getting hot, but it is not the hottest.

The dog days are divided into three days: the beginning, the middle and the end. The initial days are 10, the intermediate days are 10 or 20, and the final days are 10. After lodging, the surface humidity increases, and the heat absorbed every day is more and the heat released is less, so the heat on the ground is accumulated. So it's getting hotter every day, entering the dog days, and the accumulated heat on the ground reaches its peak, and the weather is the hottest.

There are three periods of intense heat: "First, it is warm and windy; Second, wait for crickets to live in space; The third waiting eagle began to crow. " Around the light summer, crops such as winter wheat and spring wheat are being harvested in northeast and northwest China. Summer and autumn crops in most parts of the country have entered the most vigorous growth period. At this time, people are busy with the field management of summer and autumn crops.