Subject
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Oleoresins
1
Plant cuttings
1
Plant propagation
1
Plants
1
Pollution
1
Provenances
1
Scaling
1
Seed products
1
Seeds
1
Silviculture
1
Silvicutural systems
1
Social aspects
1
Soils
1
Statistics
1
Stems (Botany)
1
Testing
1
Trees in cities
1
Turning (Lathe work)
1
Valuation
1
Water resources development
1
Water-supply
1
Watershed management
1
White pine
1
White pine weevil
1
Wilderness areas
1