The selection of improved varieties is the premise of high yield and high efficiency of Astragalus. It is reported that the Mongolian Huanghua and the Huanghua in Anguo, Hebei Province are genuine products, and the best local varieties can also be used to obtain higher returns for less investment. The choice of land and the preparation of Astragalus is a deep-rooted crop. It is a cool and cool climate. It is relatively drought-tolerant and cold-tolerant, but it is frightened and afraid of heat. Therefore, in the plain area, we should choose high-desert, well-drained, loose and fertile sandy loam; while in the mountains, we should choose a sunny, well-drained sunny slope. Temperature is too high, often inhibit the growth of the leaves; the soil is too wet and can cause root rot. After choosing the best, apply 4000 kg of organic manure and 30 kg of diammonium phosphate per acre as base fertilizer, deepen 30-45 centimeters deeper, and level and make small one-meter sorghum or flat plow to prepare for sowing. Seeding and sowing of Astragalus seed to reproduce, hard skin, poor water absorption, germination rate is low. Therefore, before sowing, in addition to pods and mold rot seeds, but also to use sand wipe, warm soup soaking and other measures to ensure the whole seedling sowing, improve germination, seedling rate and reduce disease. Astragalus can be sowed in spring, summer and autumn. The suitable temperature for seed germination is 14-15°C. Spring sowing is generally used shallow ditch depth of about 3 cm, the seeds evenly sprinkled in the ditch, the sowing rate of about 1-1.5 kg per mu, after sowing cover 2 cm of fine soil, pay attention to soil moisture. Spring sowing occurs in 10-15 days, and autumn sowing needs to emerge in the spring of the following year.
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