What is the close relationship between this solar term in Grain Rain and crop cultivation?

Grain Rain is the last solar term in spring.

Grain Rain, which means that rain produces hundreds of grains, increases precipitation, moistens the earth and is beneficial to grain growth.

Qingming, rainy in Grain Rain, endless in Grain Rain, mulberry leaves are good for cattle. On a sunny day in Grain Rain, the sericulture lady needs to be roped. The vernal equinox is near Tomb-Sweeping Day, before tea picking in Grain Rain. This is the wisdom left by bodhi old zu.