Abstract: A cultivator of the type having a vertically movable harrow bar followed by a vertically movable harrow roller. A plurality of springs biases the roller down against the ground. The springs are operatively connected to the harrow bar in a manner to have vertical movement of the bar automatically vary the pressure exerted by the roller.

Abstract: An agricultural apparatus and more specifically a cultivator intended to till the soil for the incorporation of chemical solutions and to prepare it for sowing. This cultivator has a double-wheel-mounted frame capable of being hitched to a tractor, at least one transverse row of tines at the front or drawing end and at least one additional transverse row of the tines at the rear. A single or double transverse cylindrical rolling harrow, spring-pressed downwardly and oscillating vertically, is provided behind the rear tines, the harrow having a churning action which breaks up the lumps left after the soil has been loosened by the tines. A further transverse rolling harrow is also provided between the front and rear rows of tines, generally at the center of the frame. This additional harrow is, like the rear one, pressed downwardly by springs and is also able to oscillate vertically.