File List Supplement1.csv (md5: c4799953f135f95ae566e0fbff46a65e) Description Supplement1.csv This database includes 2024 records (1012 paired observations) collected from 112 published articles (see Appendix A). Each record includes the source of the data, field site, ecosystem type, experimental approach, experimental CO2 concentration, plant species, the plant tissues measured, N treatment, both plant N and P concentrations or pools, and N:P ratio (means and standard errors).