Action des ions ferreux sur la reduction de l'acide nitreux dans les sols hydromorphes

It was postulated that chemical denitrification per se can take place in soils especially in the presence of certain metallic cations. Denitrification was measured by gas evolution from soil and changes in the proportion of different gases (N₂, N₂O and NO). Such measurements showed that in hydromorphous soils reduction of nitrite occurs in the presence of ferrous-iron. The influence of different extractant solutions and stirring of the soil during such experiments was investigated. In field soils N₂O and N₂ appear to be the only products of the reduction of NO₂^?-N by Fe²⁺.