English AGROVOC
RT
Ammonia
RT
Nitrification inhibitors
RT
Nitrites
RT
Nitrogen
RT
Nitrogen cycle
RT
Nitrogen fixation
RT
Nitrogen fixing bacteria
RT
Soil biology
(Lao)
ການເຮັດໃຫ້ມີໄນໂຕຣເຈນ
(French)
Nitrification
(Spanish)
Nitrificación