README for the datafile associated with Trierweiler, Annette, Winter, Klaus, and Hedin, Lars (2018) Rising CO₂ accelerates phosphorus and molybdenum limitation of N₂-fixation in young tropical trees. Plant and Soil. DOI: 10.1007/s11104-018-3685-7 Date: 5/23/2018 Contact: annette.trierweiler[at]gmail.com Metadata for Trierweiler_2011_2012_CO2_P_Mo_growth_data.csv and Trierweiler_2011_CO2_P_Mo_CN_data.csv There are two csv files 1.Trierweiler_2011_2012_CO2_P_Mo_growth_data.csv, which provides information about growth, ARA measurements, and biomass at the time of harvest 2.Trierweiler_2011_CO2_P_Mo_CN_data.csv, which provides the leaf tissue C:N measurements Each row represents data associated with a sapling in the experiment. NA’s indicate the sapling was dead or the data was otherwise unusable. Each column can be interpreted as follows: 1.Trierweiler_2011_2012_CO2_P_Mo_growth_data.csv ID : Unique ID of the seedling Species : Species name: Ormosia macrocalyx, Handroanthus guayacan, or Inga marginata Fixer : Whether the seedling has the potential to fix nitrogen or not, Y = yes, N = no Year : Year of experiment. 2011 (Ormosia macrocalyx, Handroanthus guayacan), 2012 (Inga marginata) Nutrient Treatment : Nutrient treatment, 0 = control; P = phosphorous was added, Mo = Molybdenum was added, PMo = Phosphorous and molybdenum was added CO2 Treatment : text description of CO2 treatment, Prin-industria CO2 : CO2 concentration (ppm) P : Phosphorous Fertilization treatment 0 = not fertilized; 1 = fertilized Mo : Fertilization treatment: 0 = not fertilized; 1 = fertilized Days : days from experiment start to harvest, All 2011 experiments started on August 4th 2011 Leaf Area : total area of all alive leaves(cm2) Leaf Area dead : total area of all dead leaves(cm2) Leaf mass : dry leaf mass (g) Leaf mass dead : dry leaf mass of dead leaves (g) Stem mass : dry stem mass (g) Root mass : dry root mass (g) Nodule mass : dry nodule weight (g) ARA : Acetylene Reduction assay (μmoles C2H2 g−1 hr−1) fixation : μmoles C2H2 hr-1 per plant Total Biomass : total plant biomass(g) RootsShoots : roots (roots and nodules) to shoots (Stems and Leaves) ratio by weight RootsStems : roots (roots and nodules) to Stems ratio by weight Nodule investment : in terms of mg dried nodule mass per g dry plant biomass (mg/g) Growth.Rate.per.day : growth rate in terms of (final weight-average starting weight)/day (g/day) Growth.Rate.g.per.week : growth rate in terms of (final weight-average starting weight)/week (g/week) Relative Growth Rate : calculated by the (LN(final weight)-LN(average starting mass))/days (g g-1 day-1) 2. Trierweiler_2011_CO2_P_Mo_CN_data.csv Sample ID : Unique ID of the seedling replicate : If there is a replicate measurement for a unique sample Id Species name : Ormosia macrocalyx or Handroanthus guayacan Fixer : fixer status, is the sample from a n2-fixer (Y) or not (N) Date analyzed : the date of when the sample was run on the Costech Elemental Analyzer N weight : the weight of nitrogen in dry sample (mg) % N : the percent dry weight that is carbon C weight : the weight of carbon in dry sample (mg) % C : the percent dry weight that is carbon C:N : The C:N ratio