Who knows the agricultural proverbs containing phenological knowledge? And tell the phenological knowledge they contain.

1. "The great cold is not cold, and the vernal equinox is not warm."

Phenological knowledge: If the weather is not cold on the day of severe cold, the cold weather will extend backward and it will be very cold next spring equinox.

2. "I am afraid of the south wind in cold weather, and I am most afraid of rain that day."

Phenological knowledge: The weather on the day of "Great Cold" was once an important indicator of agriculture. As long as the north wind blows on this day, it will make the weather cold, which means that there will be a bumper harvest in the coming year. On the contrary, if the south wind blows and the weather is warm, it means that the crops will fail in the coming year. If it rains, the weather next year may be abnormal, affecting the growth of crops.

3. "The south wind sends cold, and the dog doesn't go out in the first month."

Phenological knowledge: Great cold should be cold, not warm. The severe cold and warm weather is unfavorable to agricultural production. The warm and wet weather in the solar calendar shows that the cold and rainy weather is serious in February-April, which has a negative impact on crop growth in spring.

4. "Ants move the snake aisle"

Phenological knowledge: There will be heavy rain tomorrow. When it rains, the rain will wash away the homes of ants or snakes, so they will move before it rains.