The following dataset was generated during the FORMAS project 2018-02402: “Fostering organic cultivation of seed legumes; a multi-scale feasibility study for soybean and lupin production in Sweden”. It contains data of various cultivars of faba bean (Vicia faba), soybean (Glycine max), and narrow-leaved lupin (Lupinus angustifolius), during a two year field trial. The locations are given based on sites (Alnarp, Gotland, or Lövsta). For precise coordinates, please refer to the associated manuscript. Descriptions of the assessments are given in the manuscript, as well as details regarding which data were emperically generated and which were calculated on other data. Each row reflects one plot, in which ten plants we sampled.

The dataset contains following columns:
Replicate, mainplot, subplot, plot, column, strip: These refer to the split-plot design implemented in the study.
Crop, code, cultivar: These refer to the crop, cultivar, and cultivar code.
Treatment: weedy (W) or weed free (WF)
N_frac, d15N, FN, Ndfa: These values refer to the total nitrogen concentration, nitrogen isotope ratio, isotopic fraction amount, and nitrogen derived from atmosphere in biomass (stems and leaves), or grain of the crop. Please refer to manuscript for calculation of the Ndfa method.	
C_fract, d13C, FC, C.N_ratio: These values refer to the total carbon concentration, carbon isotope ratio, isotopic fraction amount, and carbon to nitrogen ratio in the biomass or gain of the crop.
Total weight nodule and measured nodule: these refer to the weight and number of the nodules per sample
Height: refers to plant height, measured in cm
Biomass_Weight and Grain_weight: weight of the biomass (leaves and stem) and grain per sample in g
Grainyield_g, Grainyield_t.ha: yield data in g per sqm or t per ha
Weeds_Dryweight_gm2: weight of the weeds in g per sqm


