Measurements of leaf net photosynthesis at the EucFACE experiment, on leaves of different trees growing in ambient and elevated CO$_2$ concentrations. Measurements were repeated four times during 2013 (labelled as Date=A,B,C,D).
eucface_gasexchange
A data frame with 84 rows and 7 variables:
Date
factor Date label (A-D)
CO2
integer CO2 treatment, Amb=ambient, Ele=elevated
Ring
integer One of six plots ('rings') where treatment was applied
Tree
integer Tree number
Photo
double Rate of leaf photosynthesis (mu mol m-2 s-1)
Trmmol
double Rate of leaf transpiration (mmol m-2 s-1)
VpdL
double Vapour pressure deficit (kPa)