Criteria

Main requirements

Hectarage of a specific site, ha, not less than

20

Quality class (lat. Bonitas), not less than

II

Forest site types, soil-hydrological conditions

В2-В3, С2-С3, green-moss and blueberry on loamy sand, wood sorrel and blueberry on loam; complex and mixed grass species

Content of physical clay in a mineral soil layer of 0-30 cm thick, %

5-30 (birch / Betula pendula)

10-50 (aspen / Populus tremula)

Depth to a dense root-proof soil layer, cm, not less than

60 (birch / Betula pendula)

40 (aspen Populus tremula)

Amount of wood residues at even distribution, m3 / ha, not more than

15

Depth of groundwater by the beginning of vegetation, cm, above

30