How do you say buried soil in the north? When does the solar term start and end?

"Entering the Earth" in the north refers to the time from the beginning to the end of the solar term in Grain Rain. Around Grain Rain, a year's farm work began to get busy, and all the plants came back to life and sprouted. Farmers remove weeds, fertilize and water crops to promote their growth. All kinds of fruits and vegetables are planted in front of and behind the house, and the vegetable greenhouse is even more busy.