The first dew, the cold dew and the late autumn equinox were exactly what they meant at that time.

It means that it is too early to plant wheat during the "White Dew" solar term, but it is too late to plant wheat during the "Cold Dew" solar term, and it is just right to plant wheat during the "Autumn Equinox" solar term.

This is a folk agricultural proverb about the best time to plant wheat. White dew, cold dew and autumnal equinox are all solar terms, with white dew on September 7-9, autumnal equinox on September 22-24,1cold dew on October 8-9, 65438. White dew and cold dew are two solar terms around the autumnal equinox.

In the Millennium season, the hot air in summer is gradually replaced by the cold air in autumn, so the temperature will drop obviously, which is not suitable for crop growth. But this solar term has a lower cold dew, and the dew on the ground is colder, which is about to condense into frost. For some late-maturing crops, it is very harmful, which often reduces the seed setting rate and leads to reduced production.

As one of the twenty-four solar terms, the autumnal equinox is equally divided day and night, and the autumn is crisp, especially in North China. Winter is a good time to sow wheat seedlings.

Extended data

Talking about agricultural proverbs about growing wheat;

1, early grain and late wheat, nine disasters in ten years.

The meaning of this folk proverb is simple, and it is also a summary of the experience of ancient working people. It means that rice should be planted late rather than early, and wheat should be planted early rather than late, otherwise the harvest will not be good in nine years within ten years. There are similar sayings, such as "plant wheat early, and reap nine crops in ten years" and "don't go home early and plant wheat late". It is said that it is better to plant wheat late tomorrow morning.

2. Not earlier than ten days before the autumnal equinox and not later than ten days after the autumnal equinox.

In other words, it is not too early to sow wheat ten days before the autumnal equinox, and it is not too late to sow wheat ten days after the autumnal equinox. Of course, it is best to plant it a few days before and after the autumnal equinox. Because "don't be too hasty, don't be too late, it's just right to plant wheat in the autumn equinox." "plant wheat and harvest it at the right time every year, and the late planting will touch the new year."

3, the autumn equinox planted mountains, cold dew planted Pingchuan, and frost-welcoming species sandwiched the river beach.

This proverb means that the time of planting wheat is different in different terrain. Because of the different topography, its climate characteristics are also different. If it is on a mountain, it is usually planted around the autumnal equinox. Pingchuan has to wait until the cold dew; This is the first frost season on the floodplain. Of course, this sentence is not absolute. After all, the weather is unpredictable and the climate varies from place to place. Specifically, it is necessary to adjust measures to local conditions, timely sow old experience early, timely sow late to increase production, depending on the type of land and weather, and the word "timely" should be ticked.