Where are gray forest soils common?

It is worth knowing that they are very widespread in the temperate zone of the Northern Hemisphere. It is also an interesting fact that one centimeter of such soil is formed in about two hundred and fifty years. They began to study such soils only in the second half of the nineteenth century. In agriculture, such soils are used for growing forage or grain crops. These soils are practically incapable of accumulating nitrites.