Solar terms of winter wheat

Analysis of test questions: The 24 solar terms are a tool to reflect the changes of weather, climate and phenology and master the farming season. In chronological order, they are beginning of spring, rainy, smelly, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Miscanthus, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, Chushuang, beginning of winter, light snow and heavy snow. . Therefore, according to the latitude position of Shandong, Henan and Beijing, the lower the latitude, the later the planting time of wheat, and the latitude of Jiangsu and Anhui is lower than that of Shandong and Henan, so the planting time is the first frost.