Growth mode:

Black beans are dwarfed or tendrils, and the plant height is about 40~80 cm.

Roots contain a large number of rhizobia, leaves alternate, 3 compound leaves, lobules oval or oval.

Flowers axillary, butterfly-shaped corolla, small flowers white or purple, seed coat black, cotyledons yellow or green.

Training points:

Soybean is planted in acidic soil, and the seeds are dressed with ammonium molybdate. Every kilogram of soybean seeds is prepared with ammonium molybdate 1g ~ 1g to prepare 1% ~ 1.5% ammonium molybdate solution, which is sprayed on the surface of the seeds and mixed evenly, and then sown in the shade.

The suitable year for direct sowing of black beans is the first half of June, and generally ditch sowing or hole sowing is adopted, with 4-5 kilograms of seeds per mu.

The best transplanting time is from late May to early June, and the seedling age is 10 ~ 15 days.

Seedlings should be transplanted by tidying the seedbed, using artificial sowing and transplanting with soil in time.