Subject
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Pine
4
Pines
1
Planning
1
Plant cells and tissues
1
Plantations
5
Planting
1
Plants, Effect of light on
1
Pollution
1
Ponds
1
Population
1
Populations
1
Preparation of
1
Prevention and control
4
Provenance trials
4
Pruning
1
Public opinion
1
Pulp and Paper industry
1
Pulpwood industry
1
Pyrethroids
1
Rain-making
1
Red pine
3
Red spruce
2
Reforestation
6
Regeneration
1
Research
3
Reservations
1
Residues
1
Resource management
1
Rivers
1
Root rot
1
Rust fungi
1
Safety
1
Safety education
1
Sawing
1
Sawmills
2
Scleroderris canker
2
Seed orchards
1
Seedlings
4
Seedlings, Container
1
Seeds
1
Selection (Plant breeding)
1
Shelterwoods
1
Silviculture
5
Sitka spruce
1
Social aspects
1
Social impacts
1
Softwood
2
Softwoods
1
Soil ecology
1
Soil pollution
1
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