ABSTRACT
In this study, mineral soil, monoionic nitrate form, calcium nitrate and the ion-exchange substrate Biona312 were used. The mineral soil was taken from an excavation boundary of a sand mine (in Turka near Lublin, Poland). It consisted of the following fractions: sand (1.0-0.1 mm) −78%; dust (0.1-0.02 mm) −11%; and silt and clay (<0.02 mm) −11%. According to the granulometric composition, the soil was classified as light loamy sand (Polish Society of Soil Science) or sandy loam (USDA). It contained 24.33 mg of available nitrogen per dm3, which is considered insufficient for vegetable plants (Sady 2000). The pH of the soil in distilled H2O was 5.39.
