Linked from
The 27 pages that link to Nitrate, each with the reason it gives.
NitrificationRelated: Nitrate is the main end product of complete nitrification.
Potassium nitrateRelated: Nitrate anions pair with potassium cations to form KNO₃.
Aluminium nitrateRelated: Three monovalent nitrate ions balance each aluminium ion.
Magnesium nitrateRelated: Two nitrate anions balance each magnesium cation in Mg(NO₃)₂.