| [modification of the nitrate content of groundwater near the surface by agricultural soil use in the example of styria]. | in a one year study, nitrate concentrations of superficial ground water were determined in styria. of 3931 samples, 21.1% were above 30 mg, 10.1% above 50 mg and 1.5% above 100 mg no3/1. the contaminated areas lie exclusively in the styrian tertiary basin, especially in the loose fluvoglacial deposits downstream of graz. these areas are further characterized by a high population density, intensive cultivation of maize and intensive animal farming (pig breeding). aside from toxicological aspects, ... | 1991 | 1777004 |