What does the sentence "No snow, it is disaster" mean?

"Heavy snow bodes well for a good year, and if there is no snow, it will suffer" is mainly spread in Jiangsu, Zhejiang, Hunan, Guangdong and other regions. If it snows, it indicates that next year will be a bumper harvest year. If there is no snowfall in the snow season, the crops will be affected. There is some truth in this statement, because it snows during the solar term, indicating that it is cold early this winter, and this snowfall indicates that there will be more rain and snow in winter. Snowfall will not only freeze the pests in the field, but also alleviate the drought after melting, which is beneficial to the growth of crops. This is the same as a good year with abundant snow.

The characteristics of heavy snow are: "The weather rises and the atmosphere falls, that is, the atmosphere does not rise, the weather does not fall, the sky is higher, the ground is farther away, the upper and lower parts are impassable, the rain does not fall, the rainbow disappears, the vegetation withers, and everything withers."

Because of the cold weather in winter, the snow is not easy to melt, and there is a lot of stagnant air hidden in the soil. The air does not transfer heat, just like covering a quilt for crops. No matter how cold it is outside, the temperature below will not drop very low. Covered with winter snow, it is not easy to attract pests.

When spring comes, the weather gets warmer and the snow begins to melt, which not only ensures that crops are not damaged by freezing, but also keeps snow water in the soil, saving a lot of water for crops, which is very beneficial to spring ploughing and sowing and the growth and development of crops.