The effect of nitrogen phosphorus potassium fertilizers used for many years on physicochemical properties of meadow soils
Gorlach, E.; Curylo, T.
Polish Journal of Soil Science 20(2): 53-60
Experiments with differentiated NPK doses were carried out in two meadows; on light and heavy soil. Increasing doses of fertilizers, particularly of ammonium nitrate, caused a systematic increase of soil acidity and a decrease of the total exchangeable bases and the reserve of available magnesium in the soil. After 16 years of intensive fertilization, the pH in the top layer of light soil decreased from 5.2 to 3.6, and that of heavy soil from 6.1 to 4.3.