Specific features of the forest-formation process on arable lands and hay fields
It is noted that the number of pine undergrowth on arable lands after 4-10 years of non cultivation reaches about 13529 pieces per / hectare, this resulting in the formation of highly productive needle leaf plantations. On most of the former hay fields young trees are often represented by 90-100% birch trees, their stand density being from 1349 to 19335 pieces per hectare. This allows to plant highly productive seed birch groves intermixed with pine trees.