Subject
- Constructed wetlands3
- Wood-pulp industry -- Waste disposal2
- Acremonium1
- Agricultural wastes -- Environmental aspects1
- Ammonia -- Purification1
- Ammonia as fertilizer1
- Animal waste -- Oregon -- Management1
- Animal waste management1
- Anti-infective agents -- Environmental aspects -- Oregon -- Stayton1
- Bacteria1
- Biodegradation1
- Cattle -- Housing -- Waste disposal1
- Cattle -- Manure -- Handling1
- Constructed wetlands -- Design1
- Dairy waste1
- Dairying -- Environmental aspects1
- Dairying -- Environmental aspects -- Oregon1
- Drinking water -- Purification -- Roughing filtration -- Oregon -- Stayton1
- Drinking water -- Purification -- Slow sand filtration -- Oregon -- Stayton1
- Effluent quality -- Oregon1