DOI: 10.13012/b2idb-6453957_v1
title: Soybean seed quality response to eCO2 data files

description: 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.

---- The 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.

---- The 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.

---- The 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. The headers are explained below:
-------- year = year
-------- month = month
-------- day = day
-------- max_wind_gust = maximum daily wind gust (miles per hour)
-------- xwser = error flag for maximum daily wind gust
-------- avg_wind_speed = average daily wind speed(miles per hour)
-------- awser = error flag for average daily wind speed
-------- avg_wind_dir = average daily wind direction (degrees, clockwise from north)
-------- awder = error flag for average daily wind direction
-------- sol_rad = total daily solar radiation (mega-Joules per square meter)
-------- soler = error flag for total daily solar radiation
-------- max_air_temp = daily maximum air temperature (degrees Fahrenheit)
-------- xater = error flag for daily maximum air temperature
-------- min_air_temp = daily minimum air temperature (degrees Fahrenheit)
-------- nater = error flag for daily minimum air temperature
-------- avg_air_temp = average daily air temperature (degrees Fahrenheit)
-------- aater = error flag for average daily air temperature
-------- max_rel_hum = daily maximum relative humidity (percent)
-------- xrher = error flag for daily maximum relative humidity
-------- min_rel_hum = daily minimum relative humidity (percent)
-------- nrher = error flag for daily minimum relative humidity
-------- avg_rel_hum = average daily relative humidity (percent)
-------- arher = error flag for average daily relative humidity
-------- avg_dewpt_temp = average daily dew point temperature (degrees Fahrenheit)
-------- adper = error flag for average daily dew point temperature
-------- precip = total daily precipitation (inches)
-------- pcer = error flag for total daily precipitation
-------- pot_evapot = total potential evapotranspiration (inches)
-------- pevaper = error flag for total potential evapotranspiration
-------- max_soiltemp_4in = daily maximum 4-inch soil temperature under sod (degrees Fahrenheit)
-------- xst4er = error flag for daily maximum 4-inch soil temperature under sod
-------- min_soiltemp_4in = daily minimum 4-inch soil temperature under sod (degrees Fahrenheit)
-------- nst4er = error flag for daily minimum 4-inch soil temperature under sod
-------- avg_soiltemp_4in = average daily 4-inch soil temperature under sod (degrees Fahrenheit)
-------- ast4er = error flag for error flag for average daily 4-inch soil temperature under sod
-------- max_soiltemp_8in = daily maximum 8-inch soil temperature under sod (degrees Fahrenheit)
-------- xst8er = error flag for error flag for daily maximum 8-inch soil temperature under sod
-------- min_soiltemp_8in = daily minimum 8-inch soil temperature under sod (degrees Fahrenheit)
-------- nst8er = error flag for daily minimum 8-inch soil temperature under sod
-------- avg_soiltemp_8in = average daily 8-inch soil temperature under sod (degrees Fahrenheit)
-------- ast8er = error flag for error flag for average daily 8-inch soil temperature under sod
-------- max_soiltemp_4in_bare = daily maximum 4-inch soil temperature under bare soil (degrees Fahrenheit)
-------- xst4bareer = error flag for daily maximum 4-inch soil temperature under bare soil
-------- min_soiltemp_4in_bare = daily minimum 4-inch soil temperature under bare soil (degrees Fahrenheit)
-------- nst4bareer = error flag for daily minimum 4-inch soil temperature under bare soil
-------- avg_soiltemp_4in_bare = average daily 4-inch soil temperature under bare soil (degrees Fahrenheit)
-------- ast4bareer = error flag for error flag for average daily 4-inch soil temperature under bare soil
-------- max_soiltemp_2in_bare = daily maximum 2-inch soil temperature under bare soil (degrees Fahrenheit)
-------- xst2bareer = error flag for daily maximum 2-inch soil temperature under bare soil
-------- min_soiltemp_2in_bare = daily minimum 2-inch soil temperature under bare soil (degrees Fahrenheit)
-------- nst2bareer = error flag for daily minimum 2-inch soil temperature under bare soil
-------- avg_soiltemp_2in_bare = average daily 2-inch soil temperature under bare soil (degrees Fahrenheit)
-------- ast2bareer = error flag for error flag for average daily 2-inch soil temperature under bare soil
-------- site = station name