Vegetation
Phytomass resources
| below 2.5 t/ha | 2.6 - 5.0 t/ha | 5.1 - 12.5 t/ha | |||
| 12.6 - 25.0 t/ha | 26.0 - 50 t/ha |
51 - 150 t/ha | |||
| 151 - 300 t/ha | 301 - 400 t/ha |
401 - 500 t/ha | |||
| over 500 t/ha | water |
ice |
Annual production
| below 1.0 t/ha | 1.0 - 2.5 t/ha | 2.6 - 4.0 t/ha | |||
| 4.1 - 6.0 t/ha | 6.1 - 8.0 t/ha | 8.1 - 11.0 t/ha | |||
| 11.1 - 16.0 t/ha | 16.1 - 30 t/ha | 31 - 50 t/ha | |||
| over 50 t/ha | water | ice |