Subject
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Evaluation
3
Forest conservation
3
Forest reproduction
3
Forest thinning
3
Harvesting
3
History
3
Norway spruce
3
Outdoor recreation
3
Parks
3
Planning
3
Planting
3
Shrubs
3
Taigas
3
Thinning
3
Vegetation management
3
Biodiversity conservation
2
Christmas tree growing
2
Christmas trees
2
Climatic factors
2
Control
2
Economic conditions
2
Energy crops
2
Forest machinery
2
Forest plants
2
Forest policy
2
Forestry
2
Genetics
2
Glyphosate
2
Maple
2
Mathematical models
2
Measurement
2
Natural resources
2
Ontario
2
Pests
2
Pine
2
Plant competition
2
Poplar
2
Provincial parks and reserves
2
Remote sensing
2
Seedlings, Container
2
Seeds
2
Sugar maple
2
Tables
2
Timber
2
Tree farms
2
Trees in cities
2
Yellow birch
2
Yields
2
ARNEWS (Acid Rain National Early Warning System)
1
Acid deposition
1
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