1 Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
2 Institute of Botany, University of Basel, Basel, Switzerland
3 Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
Data obtained in the free-air CO2 enrichment (FACE) experiment at Hofstetten, NW Switzerland, between 2009 and 2016. This dataset contains analyses of the soil solution throughout the experiment, especially for nitrate, as well as different analyses done at the end of the experiment: ammonium and nitrate captured by ion-exchange resin bags and extracted from soil cores, gross N mineralisation and nitrification measured by isotope dilution.
Keywords: CO2, FACE, Forest, Picea abies, soil, nitrogen