The SWOM model: a tool for the correct choice and use of the different soil tillage types

SWOM is a real time computer model for determining soil workability condition based on soil water balance of a field under different canopy status (barren soil, residue cover soil and crop cover soil). The effects fo tillage and weathering on the tilled layers of the soil are analyzed. In fact, SWOM simulates the changes on soil bulk density and storage capacity of the soil surface during time. The model's output provides information about the soil workability, according to the type of implements used in working. The implements are grouped into five categories defined on soil engaging mechanism basis. For determining soil workability condition the "fuzzy set theory" is used. The Agrometeorological Department of Veneto Region is going to be used the model, when its calibration will be completed, for drawing up the agrometeorological bulletins in which indications to the farmers about the time and the implements more suitable to perform and complete the soil tillages are supplied.