2. Soil preparation and sowing. Cowpea planting area is suitable for semi-sandy weak acid soil with rich humus and good drainage performance. Cowpea planting is suitable for planting in the border. Generally, the width of the border is about 1 m, and the depth of the ditch is 20 ~ 25 ㎝, which is convenient for water filtration and drainage. Two rows per border, with a row spacing of 30㎝ and a plant spacing of 25 ~ 30 ㎝. When sowing, don't sow the common vegetable fields and fertile vegetable fields too closely, let alone use base fertilizer. For barren land, a small amount of organic fertilizer can be used as base fertilizer. Generally speaking, cowpea cultivation does not need any fertilizer except on barren land. Because there is a rhizobia on the root system of cowpea, it can fix the nitrogen in the air as a physiological nitrogen fertilizer, and the phosphorus and potassium fertilizer contained in the general soil can meet the needs of cowpea growth and development. Therefore, in the process of cowpea planting, the general land does not need fertilization.

3. Seedling management. Cowpea can be sown from early April to early July. After sowing, seedlings began to emerge in about 7 ~ 10 days. 15 ~ when cowpeas appear 20 days after emergence, the scaffold should be set up, and vines should be tied 30 days later to enter the initial flowering stage. During this period, it is necessary to strengthen field management, combine weeding and intertillage to promote the growth and development of cowpea root system at seedling stage, promote the nitrogen fixation of rhizobia and promote the growth of seedlings. Pay attention to the smooth drainage system in the field in rainy days, strengthen water filtration and discharge accumulated water to avoid diseases caused by water stains. If it doesn't rain for a long time, pay attention to the change of soil moisture and replenish water immediately.

4. Pest control. Cowpea diseases include virus disease, root rot disease, rust disease, red spot disease, angular leaf spot and so on. The commonly used drugs are: Dulining, thiophanate-methyl, carbendazim, chlorothalonil, basic copper carbonate, triadimefon, mancozeb, thiophanate-methyl, etc., and the effect is good. The common pests of cowpea are aphids, whiteflies and borers. You can use 10% imidacloprid wettable powder 1500 times solution for foliar spraying, or use 3,000 times solution of 2.5% deltamethrin EC, or use 50% phoxim EC 1000 times solution for foliar spraying, or use 65,433 times solution for foliar spraying.