Abstract
Nitrogen renovation in a forest spray-irrigation system was monitored by soil and groundwater nitrate, and chloride concentrations, for 14 months. Nitrate concentrations in soil water in the spray zone increased to 37 gm −3 NO 3−N but were less than 0·1 gm −3 NO 3−N in the wetland. The results indicate that approximately 98% of the nitrogen applied to the site was removed and it can be inferred that denitrification was the main pathway of loss.
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