Spring wheat sowing in North China can generally be mastered before the end of March, and the first time is to apply enough fertilizer. Because spring wheat is more sensitive to phosphorus than winter wheat, and spring wheat grows fast, spike differentiation begins at the three-leaf stage, reproductive growth and vegetative growth progress, and a large amount of fertilizer needs to be absorbed. Therefore, the base fertilizer must be applied at the time of sowing, and special emphasis should be placed on the application of phosphate fertilizer and potash fertilizer. In the fertilization method, it is necessary to master shallow fertilization, and the depth should be 7-10 cm. A double box seeder can be used, and the seed is planted behind the front. Or single-player replay, first seeding after sowing. The second is to use fertilizer water skillfully. Pay attention to watering and topdressing, combined with watering for 35-45 kg of ammonium carbonate per 667 square meters. If there is no watering condition in spring, 20-30 kg of urea can be applied at the time of sowing.
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