Subject
- Nitrification2
- Nitrogen -- Fixation2
- Nitrosomonas2
- Nitrosomonas -- Physiology2
- Soil microbiology2
- Abscisic acid1
- Agricultural pollution -- Biodegradation -- Oregon1
- Alfalfa1
- Ammonia -- Oxidation1
- Antibacterial agents1
- Antibiotics in food preservation1
- Atheliaceae -- Oregon -- H.J. Andrews Experimental Forest1
- Atrazine -- Biodegradation -- Oregon1
- Bioremediation1
- Cowpea -- Diseases and pests -- Biological control -- Sri Lanka1
- Denitrification1
- Denitrifying bacteria1
- Douglas fir -- Ecophysiology1
- Ectomycorrhizal fungi -- Oregon -- H.J. Andrews Experimental Forest1
- Endangered plants -- Conservation -- Oregon -- Cave Junction Area1