A variation of seeding depth did not play any role in agricultural appli- cation. Modern spacing drills offer the possibility for a mechanical change of the seeding depth but it is scarcely used as the user does not know on what the setting should rely on. Changing soils and topo- graphic variations are responsible for different water contents in the top soil layer. A simulation model for corn is supposed to include spa- tial viability. Through variation of seeding depth it allows to establish uniform conditions for germination.
