User manual for GUI-version 4C

Input-Data

• file and start 4cwin.exe in a directory, that has the subfolders input and output
• file *.sim acts as model-control in which the used data and the control-flags are saved
• description of the soil profile: *.sop
• nitrogen availability: *.red
• climate *.cli
• inventory (population,crop) initialization: *.ini
• tree species parameter: species.par
• management-control: *.man

Output-Data

(unless explained in other documents)

• *.ctrl contains an overview of the simulation-control
• Two ,compressed’-files are automatically being applied with an opening information (*_B.cmp) and the performance information (*_E.cmp). The latter file includes average- and final value of some model variables
• *_error.log includes information about errors (absence of files or model problems)
• *_tree.ini1 and *_soil.ini1 include the inventory- and soil information at the end of the simulation, and can be used to start an other simulation
• Daily and annual output-dimensions are described in the respective chapter.

Graphical User Interface (GUI)

1st window

• Press point 1(Start simulation): Choice of a default *.sim file

• 4C opens a DOS-window, which displays some messages and information about the simulation run.

After the end of the simulation:

• Press Exit 4C
• Close DOS-window