Abstract
ABSTRACT The current investigation compared various intensive crop rotations (Norfolk, row crops, cereals, short-term grass) grown on Cambisols. The results showed significant effects of N fertilization on the agro-ecosystem and N balance, and on the mineral N concentration in drainage water and its leaching process. The highest N concentration in drainage water and leaching was determined in the cereals and row crops rotations. No major impact of the crop rotation on the P-PO4 3- concentration in drainage water was determined. The average leaching of P-PO4 3- by drainage did not exceed 100–140 g ha−1 within a seven-year study period. A rational and well-considered fertilization regime ensures high crop productivity and profitable farming as well as a steady, close-to-neutral N balance, which is the main condition for reducing the non-point source pollution of water.
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