A tillage implement (10) has a frame (12) with a center section (14) and first and second outer wing sections (16) hingedly attached to respective outer ends of the center section (14). Controlling a pressure in a secondary side (82) of a hydraulic circuit (60, 80) enables adjustment of the downward pressure precharge provided by hydraulic cylinders (50A) based on a desired stiffness of the implement (10) Flow from a hydraulic supply (70) through a pressure reducing valve (80) and puts the downward pressure precharge on gauge wheels (42A). Once this desired downward pressure precharge has been achieved, flow from the hydraulic supply (70) is shut off and a blocking valve (90) holds the pressure such that the hydraulic cylinders (50A) hold the gauge wheels (42A) in the desired position.
