This data set is related to a SoyFACE experiment conducted in 2004, 2006, 2007, and 2008 with the soybean cultivars Loda and HS93-4118. The experiment looked at how seed elements were affected by elevated CO2 and yield.

In this V2, 2 new files were added per journal requirement. Total there are 5 data files in text format within the digrado_et_al_gcb_data_V2 and 1 readme file. The name of files are listed below. Details about headers are explained in the readme.txt file.

1. ionomic_data.txt file contains the ionomic data (mg/kg) for the two cultivars. The file contains all six technical replicates for each plot. The cultivar, year, treatment, and the plot from which the samples were collected are given for each entry.
2. yield_data.txt file contains the yield data for the two cultivars (seed yield in kg/ha, seed yield in bu/a, Protein (%), Oil (%)). The file contains yield data for every plot. The cultivar, year, treatment, and the plot from which the samples were collected are given for each entry.
3. mineral_pro_oil_yield.txt file contains the yield per hectare for each mineral (g/ha) along with the yield per hectare for protein and oil (t/ha). This was obtained by multiplying the seed content of each element (minerals, protein, and oil) by the total seed yield. The file contains yield data for every plots. The cultivar, year, treatment, and the plot from which the samples were collected are given for each entry.
4. economic_assessment.txt file contains data used to assess the financial impact of altered seed oil content on soybean oil production.
5. meteorological_data.txt file contains the meteorological data recorded by a weather station located ~ 3km from the experimental site (Willard Airport Champaign). Data covering the period between May 28 and September 24 were used for 2004; between May 25 and September 24 were used in 2006; between May 23 and September 17 in 2007; and between June 16 and October 24 in 2008.