48
P. Cepuder and V. aus-der-Schmitten
Figures 7 and 8 show relative values of decrease of nitrate concentration in
percolation and nitrogen leaching, based on CR4-a. The highest decrease of nitrate
concentration in percolation water occurred on areas with low plant-available
water capacity. On deep soils, alterations in crop rotation were less effective.
Nitrate concentration
. . > 40 %
20 - 40 %
~ 0 - 20 %
c=J No Data
Fig. 7. Decrease (% of CR4-a) of nitrate concentration in percolation water from CR4-a to
CR4-b