The TERRIA is easily operated using 3 double-acting spool valves. Clearly labelled valves are located on the drawbar to control the various functions.

1. Control device: Folding the stubble cultivator and setting the triggering pressure for the stone protection system

2. Control device: Controlling the chassis when raising and lowering the machine at the headland

3. Control device: Setting the working depth using the jockey wheels and rear roller