According to the understanding and accumulation, give an agricultural proverb and talk about its phenological knowledge.

1. The proverb "It's neither cold nor warm at the vernal equinox" means that if the weather is not cold on a cold day, the cold weather will extend backward, and it will be very cold at the vernal equinox next year.

2. The proverb "See three things in the cold, farmers have plenty of food and clothing" means that in the cold season, if it snows more, locust larvae will freeze to death, so that the crops in the coming year will not be affected by pests, and the crops will be bumper, and farmers will have plenty of food and clothing.

3. According to the popular saying that "the pig is wet in the severe cold, and the grain buds rot in March", "the cow is wet in the severe cold, and it will be cold on March 3 next year", and "the south wind sends the severe cold, and the dog doesn't go out in the first month", the severe cold is not as cold as the first warm. There are many proverbs that the cold and warm weather is unfavorable to agricultural production. Proverbs say that the weather is warm and humid in solar terms, which means that the cold and rainy weather in February-April in the solar calendar is serious and has a negative impact on crop growth in spring.

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