A method and system of tillage and tillage management that includes the steps of establishing a plurality of soil profiles over an area of soil to be cultivated, creating soil map database by combining these soil profiles to establish a treatment and cultivation regime, cultivating the ground in accordance regime and recording the cultivation in the soil map database. A subsoil tool for carrying out the method and system, with a shank (18) connected to a vehicle and to a ripper foot (20) terminating in a ripper tooth (22); a hydraulic ram (26) attached at a lower end to a first pivot connection (28) and at an upper end to an actuator the first pivot connection is attached to a rear end of a laterally extending wing member (30), a front end of the wing member being pivotally attached to the shank through a second pivot point (32) and the wing member is selected in accordance with soil profile at any position on a soil map database and is oscillated in response to actuation of the ram.