Chernozem develops in soils under meadow steppe and grassland vegetation in temperate semi-humid and semi-arid areas. The main feature is the accumulation of organic matter in the soil is greater than the amount of decomposition, the upper part of the soil there is a black or gray black and fertile humus layer below the layer or soil in the lower part of a lime accumulation of calcium layer, hence the name. Mainly in the Eurasian continent and the western region of North America. Most of China is located in the west of the northeast and east of Inner Mongolia, especially on the east and west sides of the Daxing'anling, central Songnen Plain, Songliao watershed, and extending to the north and west of Yanshan and Yinshan. The potential fertility of chernozem is high, and a considerable portion is suitable for the development of grain and oil crops. Chernozem is a very fertile soil, wheat production is high, so the distribution of the soil area known as the world's granary.
