Vigna sp is also known as beans, long beans, beans, and skirts. Leguminosae, an annual herbaceous plant. The tender pods are thick and tender, and they can be fried. They can also be hot and cold, marinated, and processed. The high temperature resistance of red beans is an important vegetable that can make up for lack of fill. The dried beans of cowpea are boiled with rice and can be used as a staple food, and also can be used as bean paste and cake fillings. (A) Biological characteristics Cowpea root system is more developed, the main root depth is 50 cm to 80 cm, and the root system of the plant is mainly distributed in the soil layer of 15 cm to 25 cm after transplanting. The roots have weak regenerative ability and are suitable for direct seeding or seedling transplanting. Stem, semi-traffic or dwarf. Cotyledons unearthed. Basal leaves opposite, simple leaves. The third true leaf is a compound leaf consisting of three small leaves and is alternate. Inflorescences, with 4-8 buds per inflorescence, densely appressed, flowering fruitlike to life. Flowers purple, lavender, milky yellow. Self pollination. Each inflorescence has 2 to 4 knots. The capsule is linear in shape, 30 cm to 100 cm long, and has dark green, green, light green, and mauve colors. Each loquat contains 8 to 20 seeds. Seeds kidney-shaped, with purple, brown, white, black or piebald and so on. Thousand grain weight 120 grams to 150 grams. (2) There are usually three types of cowpea, ie, V. sesqulp. tis, V. senensis, and V. cawng. Ipomoea genus is a hard aphid species, which eats grain and is used for grain cultivation. The length of the short kidney bean pods is less than 30 cm. The pods are thin and the fibers are stiff and hard. They are mainly used for food and also for vegetable use. The length of the long pod bean pods is more than 30 cm. The tender quail is thick and the vegetables are mainly used. Changhong beans can be divided into three types of green bark, white bark and red bark according to their color. According to the different light cycle requirements for flowering can be divided into spring cowpea and autumn cowpea. The excellent varieties of spring cowpea in the Yangtze River and the Huaihe River Valley include the 28-2 and the red-billed swallow (or a little red). The excellent varieties of autumn cowpea include Qiuyu 51-2, Qiuyu 17 and Baiji 2 in Zhejiang. (3) Sowing seedlings and cultivating cowpeas. See Table 2-21 for the method of direct seeding or seedling transplanting, cowpea cultivation methods, seedling nursery time and methods. (4) Field management The early-stage shelf-beans have a weaker shelf-to-shelf capacity. Regularly vines and vines should be added to the shelves. The beans and pods in the pods must be sufficient. The rest is the same as field beans management. (e) Harvesting and Seeding 1. Harvested early cowpeas began to be marketed in late May and harvested in early July. Each mu (1 mu = 667 square meters) produces 750 kg to 1,000 kg. Spring cowpea began to be marketed in mid-June, harvesting was completed in early August, and 1,000 kg to 2,000 kg were produced per mu (1 mu = 667 square meters). Fuxi beans began harvesting in early July and harvested in late September, yielding 1,000 kg to 1,500 kg per mu (1 mu = 667 square meters). Autumn cowpea harvested from mid-August to early-October, producing 500 kg to 750 kg per mu (1 mu = 667 square meters). 2. To retain the planting and seeding land, select the single plant with the characteristics of the variety, good growth, early flowering, multiple scabs, and no pests, and then select the size, length, and thickness of the two plants on the individual plant. Neatly preserved soybean meal. The rest of the plants, after de-mixing and removing them, were left in the middle and lower pods for seed production. Each mu (1 mu = 667 square meters) can receive about 75 kg of seeds. After the seeds are threshed and sun dried, they must be smoked to kill the beans in the seeds in time, or a small amount of camphor balls should be mixed in the seeds to prevent worms.