Under special soil conditions (mainly hypoxia), nitrate (NO3-) ions are converted into various gaseous nitrogen oxides (NOx, N2O) and nitrogen by denitrification.
ພາຍໃຕ້ເງື່ອນໄຂຂອງດິນພິເສດ (ສ່ວນໃຫຍ່ແມ່ນ hypoxia), nitrate (NO3-) ion ຖືກປ່ຽນເປັນແກນໄນໂຕຣເຈນອາຍແກັສ (NOx, N2O) ແລະໄນໂຕຣເຈນໂດຍການ denitrification.