The paper presents the studies performed regarding the process of ammo
nium nitrate preparation with zinc- or manganese microelements, by int
roducing in the melt, before granulation, the indigenous natural zeoli
te, having zinc - or manganese - content. The zeolite inclusion in the
ammonium nitrate does not modify the chemical and phase composition o
f the ammonium nitrate, improves the thermal stability, as well as the
quality of the fertilizer thus obtained.