Belowground nitrogen cycling in a montane grassland exposed to elevated CO2, warming and drought

#### Data description Data from a multi-factorial global change experiment (elevated CO2, warming and drought) in a montane grassland experiment in Austria (ClimGrass). Variables presented are soil nitrogen cycling rates measured using isotope pool dilutions. Companion paper will be linked following manuscript publication. #### Metadata climgrass_soil_N_cycling.csv data description Year: 2017 Harvest: three harvests (May 30, July 25, October 3) Season: numerical column for harvest number Plot: location of plot within the ClimGrass experiment Treatment: eight treatment levels c0t0 (ambient CO2, ambient temperature) c0t1 (ambient CO2, + 1.5°C) c0t2 (ambient CO2, + 3°C) c1t1 (+150 ppm, +1.5°C) c2t0 (+300 ppm, ambient temperature) c2t2 (+300 ppm, +3°C) c0t0-d (ambient CO2, ambient temperature, extended drought) c2t2-d (+300 ppm, +3°C, extended drought) CO2_ppm: three values of carbon dioxide enrichment treatment (+0, +150, or +300 ppm) Temp_C: three values of elevated temperature treatment (+0, +1.5, +3°C) Drought: two levels (control, drought) Prot_depoly: gross protein depolymerization rates (micrograms nitrogen per grams dry soil per day = µg N g-1 d-1) FAA_uptake: gross free amino acid uptake rates (µg N g-1 d-1) MRT_FAA_hrs: mean residence time of free amino acids (hours) FAA: free amino acids (µg N g-1) Mineralization: gross mineralization rates (µg N g-1 d-1) Nitrification: gross nitrification rates (µg N g-1 d-1) #### References Additional information on the experimental design can be found in the following paper: Piepho, H.-P., Herndl, M., Pötsch, E.M., Bahn, M., 2017. Designing an experiment with quantitative treatment factors to study the effects of climate change. Journal of Agronomy and Crop Science 203, 584–592. doi:https://doi.org/10.1111/jac.12225 More information on the isotope pool dilution method used can be found in the following paper: Wanek, W., Mooshammer, M., Blöchl, A., Hanreich, A., Richter, A., 2010. Determination of gross rates of amino acid production and immobilization in decomposing leaf litter by a novel 15 N isotope pool dilution technique. Soil Biology and Biochemistry 42, 1293–1302. doi:10.1016/j.soilbio.2010.04.00