2, "before and after the Qingming, planting melons and beans", Qingming season, in addition to the northeast and northwest, most of China's average daily temperature has risen to more than 12 degrees Celsius, north and south of the Yangtze River until the Great Wall and the interior and exterior, everywhere is a busy spring plowing scene. "Qingming Festival, wheat long three sections", south of the Yellow River and Huaihe District of wheat is about to pregnant ears, rapeseed has been full flower, Northeast and Northwest wheat also entered the pulling period, should be grasped to get the late fertilization management and pest control work. Northern dry, Jiangnan early, middle rice into a large number of sowing season, to seize the opportunity to seize the sunshine early sowing. Pear wind is clearing, this time a variety of fruit trees into the flowering period, pay attention to good artificial pollination, improve the fruit rate. South China early rice planting sweeping, fertilizer should be carried out in a timely manner. Around the corn, sorghum, cotton will also be sown. "Mingqian tea, two buds", the tea tree buds are growing strong, pay attention to the prevention and control of pests and diseases; tea production areas have been exploited one after another, should be strictly scientific harvesting, to ensure that the yield and quality. At this time, the northern cold air still has a certain force, the weather is cold and warm, should pay attention to the defense of low temperatures and late frost weather on wheat, rice seedlings and flowering fruit trees, as well as other spring sowing crops caused by hazards.