Effects of acid irrigation and liming on nitrate reduction and nitrate content of Picea abies (L.) Karst. and Oxalis acetosella L.Gerhard Gebauer, Gabriele Hahn, Hermann Rodenkirchen, M. ZulegerPlant and Soil2004Nitrate reductase activities (NRA) and nitrate concentration per unit biomass in Picea abies (L.) Karst. roots from four different soil horizons and in leaves and roots of the frequent field-layer… (More)