The autumnal equinox is early and the first frost is late. What's the next sentence?

The autumnal equinox is early, and the next sentence of the first frost is that now is the time to plant wheat in the cold dew.

The autumnal equinox is early and the first frost is late. The next sentence is "It's just the right time to plant wheat in cold dew". The whole sentence is "the autumnal equinox is early, the first frost is late, and the cold dew is planting wheat at that time."

This sentence refers to the three seasons of buckwheat planting. The autumnal equinox is earlier, and it is only planted in colder places, and it is planted later in the first frost. It can be planted in warmer places, and buckwheat is mostly planted in cold places.

Because China has a vast territory and the climate in different regions is different, the time of sowing buckwheat is different in different places, so the proverbs and agricultural proverbs circulating in different places are also different.

No matter where wheat is sown, the temperature must be kept at 15~ 18℃, which shows that the sowing date is closely related to local conditions.

In addition, by comparing the temperature conditions of suitable sowing solar terms mentioned in agricultural proverbs with those of adjacent solar terms, it can be found that before and after this solar term, it is higher or lower than the suitable sowing temperature of wheat, so a solar term is the most suitable period for a certain region.

The concept of autumnal equinox:

The autumnal equinox is the sixteenth solar term among the twenty-four solar terms and the fourth solar term in autumn. Fight refers to unitary; The sun reaches the yellow meridian180; Celebrated on September 22-24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun shines almost directly on the equator of the earth, and the length of day and night is equal all over the world.

The autumnal equinox means "equally divided" and "equally divided", which means equally dividing autumn except day and night. After the autumnal equinox, the position of direct sunlight moves south, and the days in the northern hemisphere become shorter, the nights become longer, the temperature difference between day and night increases, and the temperature drops day by day.

In the same solar term, every year is 6 hours or 5 hours later than the previous year, and the leap year is 24 hours earlier. In this way, the date reflects that the same solar term remains unchanged or lags behind the previous year 1 day; The leap year remains unchanged or is earlier than the previous year 1 day.

At the autumnal equinox, the Yangtze River basin and its vast northern areas in China entered the autumn divided by "climatic average temperature" one after another, and the daily average temperature dropped below 22℃. The cold air mass in the north began to have some influence. The rainy season has just ended in most areas, with a cool breeze blowing gently. Autumn is crisp and the sky is high and the clouds are light.