Subject
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Fir
19
Norway spruce
19
Tree farms
19
Weed control
19
Acid rain
18
Afforestation
18
Forest roads
18
Resource management
18
Climatic factors
17
Fuelwood
17
National parks and reserves
17
Propagation
17
Rivers
17
Wildlife
17
Wildlife conservation
17
Fertilizers
16
Sustainability
16
Application
15
Equipment and supplies
15
Law and legislation
15
Testing
15
Weeds
15
Aerial spraying and dusting in forestry
14
Analysis
14
Conservation
14
Ecosystem management
14
Environmental protection
14
Forest fires
14
Forest industry
14
Forest pests
14
Genetics
14
Manuals
14
Pesticides
14
Production
14
Tourism
14
Valuation
14
Wetlands
14
Annual report
13
Biotic communities
13
Climatic changes
13
Conservation of natural resources
13
Economic conditions
13
Forestry practices
13
Grading
13
Lumber
13
Old growth forests
13
Pollution
13
Public lands
13
Quality
13
Recreational use
13
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