Reserve nitrogen.
ref_resn
Name of the functional groups given as character string. The names match with the column 'LongName' in the functionalGroups.csv file.
Ageclass given as integer from 1 to NumCohorts.
Boxid starting from 0 to numboxes - 1.
Layerid starting from 0 to numlayers - 1.
Simulation time in years. Modeltimestep was converted to actual time based on the settings in the 'run.prm' file.
Obseravtion column storing the actual output value. Reserve weight in mg N.