The content of nitrogen, and nitrate in particular, of some ground- and surface-water supplies is of much concern because of the potential health hazard to infants (methemoglobinemia) and to livestock. It also may contribute to the eutrophication (over-enrichment) of surface bodies of water and may delay the ripening of certain fruits, vegetables, and other crops.

This work was mainly supported by the Kearney Foundation of Soil Science. Details of this work can be found in the Journal of Environmental Quality. Vol. 5, No. 3 July-Sept., 1976.