Dry matter yield and nitrogen fixation of Pisum sativum and Vicia faba at elevated CO2 and three nitrogen levels.

The dataset provides information about the effect of elevated CO2 and N addition on the biomass yield and the percentage of nitrogen derived from air (%Ndfa) of two legume species, Pisum sativum L. and Vicia faba L. The experiment was carried out under controlled conditions in growth chambers