1, green beans are also called kidney beans, lentils and April beans, which are panicum miliaceum. In Quzhou, Zhejiang Province, it is called Qingming bean, and in Sichuan and some central China, it is called green bean, which is one of the common vegetables on the table. Young stems are different from varieties, showing green, dark purple and lavender. The stems of adult plants are mostly green, and a few are deep purple. The pod is strip-shaped, slightly swollen, long 1 0 ~15cm, wide1cm, and hairless.

2. Kidney beans are most suitable for cultivation in deep, soft soil with rich humus and good drainage. Sandy loam, loam and general clay can grow, so it is not suitable for cultivation in low wetland and heavy clay. The suitable pH is 6 ~ 7, and it is not suitable to be too acidic or too alkaline. Kidney beans absorb more nitrogen and potassium and less phosphorus. You also need some calcium fertilizer.