Subject
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Climatic factors
6
Economic aspects
6
Effect of air pollution on
6
Forest productivity
6
Habitats
6
Herbicides
6
Leaves
6
Logging
6
Yields
6
Acid rain
5
Children
5
Fertilizers
5
Forest regeneration
5
Forest thinning
5
Gypsy moth
5
Norway spruce
5
Pesticides
5
Plantations
5
Spruce
5
Spruce budworm
5
Storage
5
Timber
5
Clearcutting
4
Education
4
Forest protection
4
Forest site quality
4
Glyphosate
4
Harvesting
4
Manuals
4
Mensuration
4
Pines
4
Pollen
4
Quality
4
Reproduction
4
Seed orchards
4
Statistics
4
Symposia
4
Bibliography
3
Birds
3
Books
3
Cavities
3
Climatic changes
3
Computer simulation
3
Conservation
3
Container gardening
3
Defoliation
3
Ecosystems
3
Forest conservation
3
Forest damage
3
Forest plants
3
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