Abstract: A reamer for drill string pullback of a horizontal directional drill includes a shaft portion defining a central axis and a first end configured for attachment with a drill string of the horizontal directional drill. A plurality of vanes extend radially from an outer periphery of the shaft, each of the plurality of vanes defining an outer peripheral tooth base surface. On each of the plurality of vanes, a plurality of cutter teeth are individually and removably secured along the outer peripheral tooth base surface thereof, each one of the plurality of cutter teeth including a body and a PDC insert manufactured separately from the body and joined therewith. Each cutter tooth of the plurality is coupled to the respective one of the plurality of vanes by a removable fastener extending at least partially through the cutter tooth and at least partially through the one of the plurality of vanes.

Abstract: The present invention relates to a rolling harrow, and in particular to a rolling harrow with replaceable attachments. The harrow has a shaft upon which several spindles are supported. Central spindles have two flanges, one of which is on either end of the spindle. Each flange preferably has sixteen holes equally spaced about the perimeter. A lip protruded beyond each flange. Two end spindles are provided, one on each end of the shaft. The end spindles have one flange with sixteen equally spaced perimeter holes and an end spindle lip that protrude beyond the flange. Junctions are formed where two lips abut each other. At each junction, attachments are removably connected to two spaced flanges. The attachments connect to two of the perimeter holes. Attachments, between successive junctions, can be rotationally offset.

Abstract: A furrow closing wheel for closing an open furrow. The furrow closing wheel has a pair of rims mounted for rotation about a generally horizontal axis of rotation. The pair of rims are mounted at an angle with respect to one another with the rims being spaced apart. The distance between the rims decreases as the rims rotate from the top of the direction of rotation to the bottom of the direction of rotation and increases as the rims rotate from the bottom of the direction of rotation to the top of the direction of rotation. Spikes protrudes radially outwardly from the rims. Teeth extend inwardly and laterally from rims. The spikes are adapted to penetrate the sides of a furrow to crumble the furrow walls and push soil in the direction of the furrow opening and the teeth mesh to press down on the furrow to properly close the furrow.

Abstract: The present invention relates to machine weight regulation system which comprises one or more ballasts (1); a fastening system (2); and a machine (3) containing a housing; capable of carrying a plurality of types of extra weight.

Abstract: A compaction system for providing one or more compaction passes for each pass of the compaction system is provided. The compaction system includes a belt and a sun element having a first axis and positioned within the belt. The compaction system also includes a planet element engaged with the sun element and the belt. The planet element is configured to revolve around the sun element and the first axis. The belt also revolves around the sun element. Further, for every revolution of the belt around the sun element, the planet element completes one or more revolutions around the sun element.

Abstract: An apparatus for servicing roadways includes a frame configured to be secured to a prime mover. The apparatus further includes a grinding drum rotatably supported upon the frame. The apparatus still further includes a driving system supported upon the frame and configured to rotationally drive the grinding drum.

Abstract: A gimbal for attaching an implement to a three-point hitch is described. The gimball includes a tow plate comprising a first side and a second side wherein the tow plate comprises lower brackets on the first side arranged to connect to lift arms of the three point hitch and an upper bracket on the first side arranged to connect to a stabilizer arm of the three point hitch. An implement plate is rotationally attached to the tow plate wherein the implement plate comprises an upper implement bracket for coupling to an upper implement arm and a lower implement bracket for coupling to a lower implement arm.

Abstract: An attachment for agricultural implements which tills soil compacted by the wheels of the agricultural implement it is attached to. In one arrangement the power and force used to till the soil is gained from the torque of the machine pulling the agricultural implement it is attached to, alternatively the tilling device is independently powered. This arrangement reduces compaction caused by the wheels of row-crop planters through the use of a shank or rolling tines. The tilling device is mounted directly behind wheels of the agricultural implement. The tilling device has the ability to raise and lower into the soil with the engaging and disengaging of the implement. In addition, in its current form it can independently be disengaged from use by raising and locking it up out of the soil, even if the implement remains engaged.

Abstract: A conditioner is configured to couple to a support member of a construction vehicle and condition the ground while the vehicle remains stationary. A conditioner can include a mounting assembly for releasably coupling to the vehicle and rotatably supporting a roller configured to provide a plurality of seed beds. A cylindrically shaped roller can have a plurality of cleats disposed along a circumferential surface. The cleats may be arranged to provide a spaced-apart staggered pattern of seed beds. Through operation of the vehicle's support member and hydraulic system, the roller can be manipulated to move along steep slopes within confined areas while the construction vehicle remains stationary at a stable location. The roller can be configured for adjustable ground compaction through addition and/or withdrawal of fluids through a port.

Abstract: Embodiments of a land preparation tool for preparing land includes a tool mounting surface defining a non-planar tool mounting surface profile and a cutting surface disposed on a surface opposite the tool mounting surface. A first channel for receiving a first securing bolt and a second channel for receiving a second securing bolt, both channels disposed within the land preparation tool and are adjacent and parallel to each other. An intermediate connector includes a first connector channel, a second connector channel, a tool interface, and a tool holder interface, the tool interface couples with the tool mounting surface of the land preparation tool. A land preparation apparatus includes a tool holder secured to a rotatable drum, and the land preparation tool and the intermediate connector are secured to the tool holder with the two securing bolts.

Abstract: A mount for carrying a plurality of field-conditioning implements selected from trash whipping implements, rolling baskets and coulters for connection to a planter or other multi-row implement is disclosed. A height and force adjustable mounting system is also disclosed that enables the force of such an implement on the soil to be modulated as desired.

Abstract: The combination of a rolling basket tillage implement and a seed distribution implement is disclosed. A height-adjustable mounting system for a rolling basket soil tillage implement is also disclosed for use with a planter that enables such an implement to be raised above the soil as needed to avoid wet conditions.

Abstract: A strip tillage implement for movement over a crop berm has a frame configured to carry a coulter, a row cleaner, a shank and closing discs. The implement includes a basket assembly located behind the closing discs having a downwardly and rearwardly directed basket drawbar that forks into left and right support arms. The basket assembly includes a left basket half section rotatably attached to the left support arm and a right basket half section rotatably attached to the right support arm of the basket drawbar in cantilever fashion. Each of the basket half sections includes a support plate and a plurality of clod-breaking tines spaced about the periphery of the plate. Each plate is substantially perpendicular to the axis of its respective support arms such that the two plates form an upwardly diverging angle with the drawbar acting between the basket half sections to clean residue collected between the half sections.

Abstract: The combination of a rolling basket tillage implement and a seed distribution implement is disclosed. A height-adjustable mounting system for a rolling basket soil tillage implement is also disclosed for use with a planter that enables such an implement to be raised above the soil as needed to avoid wet conditions.

Abstract: Embodiments of a land preparation apparatus comprise a rotatable drum and a plurality of tool assemblies disposed on the rotatable drum, wherein each tool assembly comprises a tool holder comprising a mounting surface defining a non-planar profile, and a land preparation tool connected to the tool holder and comprising a mounting surface in flush contact with the tool holder mounting surface. The mounting surface of the land preparation tool defining a non-planar profile, which is the inverse of the non-planar profile of the tool holder mounting surface.

Abstract: A gardening hand tool for digging holes is provided. The tool further comprises a pair of shovel blades aligned parallel to each other and are pivotally attached to the bottom of a shaft member. A handle is attached to the upper end of a shaft member and is pivotally connected to the shovel blades.

Abstract: A device for fixing blades to plates which are rotationally integral with a rotary shaft and an agricultural machine fitted with the device. The device is characterized in that the flanks of each plate are cut and embodied such that they can receive in an interlocking matter and radially retain a planer additional part acting as a supporting leg for a blade and in that the end plates are axially and jointedly packed against each other in order to lock the blades to the respective end plates. The invention can be used in agricultural machines.

Abstract: Embodiments of a land preparation apparatus comprises a chamber comprising at least one internal surface, and a plurality of internal rakes configured in a non-linear arrangement along the at least one internal surface. Further embodiments of a land preparation apparatus comprises a chamber comprising at least one internal surface, a rotatable tool rotatably mounted within the chamber and having a plurality of tool elements for land preparation, and a plurality of internal rakes configured in a non-linear arrangement along the at least one internal surface, wherein the rotatable tool moves the plurality of tool elements relative to the plurality of internal rakes. The land preparation apparatus may be removably or fixedly connected to a vehicle to form a land preparation machine.

Abstract: A furrowing attachment comprising at least three cutters axially spaced apart from one another and operatively coupled to one another, the three cutters comprising a second cutting disc interposing a first cutting disc and a cutting blade, the first cutting disc, the second cutting disc, and the cutting blade are coaxial, where each of the cutting discs includes a plurality of circumferentially distributed teeth, at least one of the circumferentially distributed teeth has an angle of attack between five and sixty degrees, and where the second cutting disc has a smaller diameter than the first cutting disc and a greater diameter than the cutting blade, and wherein one rotation of the first cutting disc corresponds with one rotation of the second cutting disc and one rotation of the cutting blade.

Abstract: A device for attaching blades to rings which are integrally connected to a rotating shaft for an agricultural machine. Each ring has several cutouts which can receive, by nesting support feet of flat segments, each segment bearing one or several blades, for mounting the segments to the ring adjacent to each other in a circumferential direction and for configuring the segments into a blade support disc.

Abstract: The animal stall soil agitator includes a mounting plate assembly pivotally attached to a tractor loader boom for pivotal movement about a transverse horizontal loader boom axis. An elongated frame assembly has an inboard frame end attached to the mounting plate assembly and outboard frame end that extends laterally to one side of the tractor loader boom. An elongated bar is journaled on the elongated frame assembly. A plurality of flat soil agitator bars are fixed to the elongated bar. The flat soil agitator bars are oriented to minimize lateral movement of agitated soil. A reversible hydraulic motor is connected to a hydraulic system of the tractor and rotates the elongated bar in a selected direction. The elongated frame assembly is pivotable about a vertical axis relative to the mounting plate.

Abstract: A soil conditioner implement designed for operation in cooperation with a supporting skid steer vehicle, the skid steer vehicle being moveable over the soil to be conditioned and having a source of hydraulic fluid under pressure for transmission to the soil conditioner implement for powering thereof and having a skid steer control system for providing a plurality of commands to the soil conditioner implement, the soil conditioner implement includes a drum member having a rotatable drum, the drum being selectively contactable with the soil to be conditioned. A bolster member is operably coupled to the drum member for supporting in part the drum member, the bolster member being shiftable between a soil engaging disposition and a flipped-up disposition, the bolster member being borne on the drum member when in the flipped-up disposition. A method of conditioning soil is further included.

Abstract: A method for increasing effectiveness of mine clearance when clearing landmines. A vehicle-mounted, mechanically driven, rotary cultivator type demining tool is provided. The demining tool includes a horizontal shaft, a demining unit rotating around the horizontal shaft, a plurality of parallel demining discs located at a distance from each other and rotating around the shaft which when the demining tool is in operation cut down into an upper ground layer to a pre-determined depth to cause mines in their path to detonate or to fragment into harmless fragments, and impact devices located between the demining discs for working the upper ground layer between the demining discs such that the impact devices impact with the upper ground layer between each pair of demining discs several times per rotation of the demining tool. An upper ground layer where mines may be deployed is worked with the demining tool.

Abstract: Apparatus for in-situ remediation of contaminant-bearing earthen material includes a generally cylindrical tined assembly; a housing for mounting the tined assembly for rotational motion; an hydraulic driver for delivering torque to rotate the tined assembly; and an additive supply system configured to drop an additive into the space defined by and along the length of the cylindrical tined assembly.

Abstract: A mine clearing vehicle (1) having a milling cutter drum (2) adapted to tear up soil, plant parts, mines, etc. on or within the top soil layer. The milling cutter drum (2) may advantageously be divided into discs (7) provided with teeth (8).

Abstract: A mobile frame (10) for supporting an elongate flexible structure (11) such as a ground working tool assembly, the mobile frame (10) is foldable between a first position in which the elongate flexible structure (11) is supported in a working condition in relation to the ground, and a second position in which the elongate flexible structure (11) is supported in a stored condition in relation to the ground. The mobile frame comprises a first frame portion (31) supported for movement over the ground and a second frame portion (32) for supporting one end of the elongate flexible structure. The second frame portion is mounted on the first frame portion for folding movement with respect thereto about a pivot axis inclined to the fore-and-aft axis of the mobile frame such that the spacing between the ends of the elongate flexible structure (11) increases as the elongate flexible structure is moved from the first position to the second position.

Abstract: A harrow includes a series of sleeves each having a plurality of teeth and telescoped non-rotatably over a rod which is rotatably journaled by laterally spaced bearing assemblies supported by mounting arms which, in turn, are attached to a tool bar. The bearing assemblies include an outer bearing and a generally cylindrically-shaped collar having a circular outer perimeter and a split extending longitudinally along the collar. The collar defines an inner perimeter disposed to receive the elongated rod. At least one radially directed pilot hole for receiving a set screw is formed through each collar. A set screw is threaded through the pilot hole and may be rotatably advanced therein to abut the elongated rod. Reactionary force from the abutment expands the collar at the split to positively engage the outer perimeter of the collar with the outer bearing.

Abstract: A blade assembly for a lawn edging machine. The blade assembly includes a hub, at least two spaced-apart blade members having two or more blade arms extending radially therefrom, and a horizontal blade member connecting the two blade members at their radially extended arm ends.

Abstract: An active rotary harrow is towed with its longitudinal horizontal axis at an acute angle relative to a line perpendicular to the direction of travel. A plurality of unitary tines are mounted by bolts or rivets on mounting plates which are secured to a shaft aligned along the horizontal axis. Each tine is made from spring steel which is flattened on one end, the flattened portion being mounted directly on the mounting plate by two or more fasteners. The tines are curved such that the outer end of the tine, being rounded in shape, is directed towards the trailing end of the harrow when in operation. The tines, and to a lesser extent, the mounting plates, are resilient in nature and can be deflected towards the trailing end of the harrow, when obstacles such as rocks are encountered. The tines are also capable of some pivotal deflection, to a lesser extent.

Abstract: A device for digging a trench having a vertical face and a sloping face. The device includes a rotor configured to rotate about an axis of rotation and means for moving the device in a direction of travel substantially perpendicular to the axis of rotation. The rotor includes a longitudinal rotor member and angled end portions coupled to the longitudinal rotor member. The rotor may also include a plurality of teeth-like elements coupled to the angled end portions.

Abstract: A planting, and agri-chemical applicating farming implement for multiple tilling functions. The implement can be deployed in multiple gang configurations. Each gang comprises a frame for coupling the implement to a tow vehicle, a blade depending downwardly from the front of the frame for initially contacting, shaping, and leveling a raised row or bed, means for applying agri-chemicals and seed to soil behind the blade, and multiple spider gangs for vigorously mixing and incorporating agri-chemical, seed, and soil. The spider gangs comprise a first gang of rotatable spiders disposed in a row beneath said frame and journaled for rotation about a first adjustable common axis of rotation, and a second gang of rotatable spiders disposed in a row beneath said frame means and journaled for rotation about a second adjustable common axis of rotation. The first and second axes of rotation preferably form equal and opposite acute angles with respect to the implement's longitudinal axis.

Abstract: A rotary harrow blade assembly for a cultivator of the type including a drawbar for attachment to a towing vehicle, a pair of swing booms pivotally connected to the outer ends of the drawbar, and a plurality of skeletal frames extending rearwardly from the drawbar and booms for carrying packers, the assembly including tracks mounted on the packer frames, an elongated wheel frame suspended from the tracks and being movable therealong for changing the angle of inclination of the wheel frame with respect to the longitudinal axes of the drawbar and booms, and a plurality of toothed wheels mounted in the frame.

Abstract: A cultivating tool for a soil cultivating machine includes a holder adapted to be mounted on a rotatable shaft and having a generally U-shaped channel receiving a working implement. A pin is disposed in the channel, and the implement has a hook which receives the pin. Cooperable retainers in the channel and on the implement are cooperable for retaining the implement in the channel, the implement being mountable on the holder by hooking the hook on the pin and effecting engagement between the retainers, the implement being demountable from the holder by disengaging the retainers from the implement and unhooking the hook from the pin.

Abstract: A plurality of sand fighter rotor units are attached to a folding tool bar upon a tractor. Each rotor unit operates in a furrow between rows of growing crops on top of the beds. Each rotor has four spiders with two distal spiders working on the side of the bed and two medial spiders working near the bottom of the furrow. The prongs of the medial spiders are longer than the prongs of the distal spiders. The prongs of the spiders are arranged to dig less than two divots per square foot.

Abstract: Soil aerating equipment has a frame moveable in an intended direction of travel, and at least a pair of shafts freely rotatably mounted on the frame for rotation about the shaft longitudinal axes. The shafts extending in rearwardly inclined opposite directions on opposite sides of a centre line of the frame extending in the direction of travel. The rearward inclination of the shafts is adjustable to desired angles in the range of from about 90.degree. to about 120.degree. to the direction of travel. Each shaft carries a series of soil-engaging substantially planar tines extending therefrom in vertical planes and positioned to sequentially engage and penetrate the soil with consequent rotation of the shafts when the frame is moved in the direction of travel. Each tine has a central longitudinal axis which extends behind the shaft rotational axis at a distance therefrom in the range from about 0.25 to about 1.

Abstract: A spider wheel for a rotary incorporator for one pass incorporation of chemicals or small grains in previously tilled soil. The incorporator includes two rows of aggressive, large diameter spider wheels supported from a toolbar for rotation in the soil about axes offset at an acute angle to the transverse direction. The spider wheels are to provide good incorporation and a smooth seed bed without hilling or chemical banding. A smaller diameter, depth limited spider wheel on each outermost end of the implement feathers the effect of the angled wheels. The spider wheels include tines having soil working surfaces for good mixing and soil moving action and a large gullet area for good trash shedding and throwing characteristics.

Abstract: Interchangeable lawn dethatcher means for a rotary cultivator with removably affixed cultivating tines. The lawn dethatcher means includes a first rigid member and second rigid member each removably affixed to the rotary cultivator in place of the cultivating tines, and a plurality of rigid dethatchment tines removeably affixed in helical array to the first and second rigid members in mirror image relationship, respectively, each dethatchment tine being received through the rigid members and arrestingly clamped at the midpoint of the tine and each tine having a bent portion at each of its ends disposed in the direction opposite the intended direction of tine rotation. The lawn dethatcher means are supported at their outermost points from the rotary cultivator by independently rotatable utility wheels sized to permit the ends of the dethatchment tines to extent below the point of contact of the wheels with the lawn and thereby into contact with lawn thatch.

Abstract: A compaction wheel is described which is suited for use with a backhoe or the like having a pivotal boom arm extending therefrom. The compaction wheel includes a supporting frame which is pivotally secured to the free end of the backhoe boom arm. A plurality of vertically disposed and horizontally spaced flat wheel members are rotatably mounted on the supporting frame and have compaction members projecting radially therefrom. In one form of the invention, the compaction members take the form of square tubes while in a modified form of the invention, the compaction members take the form of flat wege members.

Abstract: A garden tiller tine assembly having an axle with a plate rigidly attached thereto. First blade structures are provided for engaging the soil and the blades are planar in configuration and have longitudinal axes. These blades are attached rigidly to the plate on one side in a plane obliquely disposed with respect to the horizontal axis of the axle, positioning a proximal edge of the first blade structure closest to the blade and a distal edge of the first blade farther from the plate than a proximal edge. Consequently, when the axle is rotated by a motor or the like in a first rotational direction, the proximal edge of the first blade will always be in front of the distal edge thereof whereby soil contact by the first blade will be thrown in a first lateral direction away from the plate. A second blade is attached to the other side of the plate.

Abstract: The invention relates to an agricultural implement provided with rotary blades (3) which are secured in a changeable manner to at least one blade-carrying flange (2) of a shaft (1). In order to reduce the work and the time for changing the blades, each blade (3) which adheres against one side of the blade-carrying flange (2) is secured to same by means of one single locking bolt (5, 6) and presents a locking shank (203) which passes through a corresponding opening (4) of the blade-carrying flange (2) and adheres against the other side of same.

Abstract: Cultivating tines, each having opposite cutting edge portions, are pivotably supported by mount brackets on a tine shaft reversibly rotatable about a horizontal lateral axis. One of the edge portions of each tine is positionable in a position rearward with respect to the direction of forward rotation, while the other edge portion is positionable in a position rearward with respect to the direction of reverse rotation. The edge portions differ in upstanding posture when positioned for rotation in the intended direction. The curved edge line of the reverse-rotation edge portion is more upstanding than that of the forward-rotation edge portion when coming into contact with the ground.

Abstract: A trench compaction device adapted for mounting on construction and excavation type equipment. The device having a sheepsfoot open-rim wheel design which is static rather than vibratory and uses the down pressure of the equipment to achieve standard density compaction requirements.

Abstract: The present invention pertains to a plowing implement provided with rotary tools of the kind comprising a horizontal powered rotor (2) provided with a series of sets (7) of radial tools (9). Each of said tools (9) consists of a substantially irregular, arcuated and pointed wedge-shaped body, having such form that, at its front portion, it exhibits a first face (ABD) remarkably inclined to a vertical plane (.pi.) and in the form of a moldboard defined forwards by a first cutting edge (AD). At its rear portion, tool (9) exhibits a second cutting edge (BC), slanting with respect to the first one and substantially transverse thereto, which defines a second face (BCD) inclined to the first and contiguous to it.

Abstract: An improved tine has a bevel on the outer side and a smooth hard surface on the inner side and, together with an improved split tine hub, provides an improved multiple tine and hub assembly with increased durability and power efficiency.

Abstract: A tubular shaft for rotary cultivators, to which shaft (2) there is attached to a series of tools (4), the tip of each tool comprising a working face (unreferenced) at an angle .alpha. to the ground (9) where .alpha..gtoreq.15.degree. and an approach face (7) at an angle .beta. to the working face where 35.degree..ltoreq..beta..ltoreq.75.degree. and also where .alpha.+.beta..ltoreq.90.degree.. The tools (4) are attached throughout the whole length thereof, suitably spaced away from one another, there being at least one such tool per diameter, and all arranged in an orderly fasion so as to cover the whole length of the shaft with no limit, the tools being set at angles to one another so that their tips describe one or several helical paths from one end of the shaft to the other.

Abstract: In a garden hand tool for loosening, cutting and crumbling garden soil or the like, comprising freely rotatable prong arrangements (17) in star-like formation which are arranged to face one another to form a "V" and the edges of which intersect one another because of the interengagement of the prong arrangements (17), thus forming cutting locations, these prong arrangements (17) are freely rotatably mounted on a bearing sleeve (12) and attached to a central axle (11) by means of a central aperture (12a). Between each bearing sleeve (12) which is slipped on the axle (11), a guide bearing (13) is also slipped over and clamped to the end of the axle (11) by an end bearing (14) and a nut (15). In such a case, the central apertures (12a) formed in the bearing sleeves (12) are disposed at an acute angle (at an inclination ) relative to the external bearing surface so as to correspond to the inclined position of the prong arrangements (17).

Abstract: A rotary hoeing tool comprising a flat portion, or hoe-blade, furnished with a forward cutting edge and one or more teeth set apart, parallel with each other, interchangeable or otherwise and protruding downwards to the rear of the tool's cutting edge, designed to forestall compaction of the earth resulting from the action of the hoe-blade. The said flat portion or blade (4, 5 & 15) may be fixed direct to the flange (11) of the cultivator's rotor shaft (10) by way of a flat shank (2), or onto an L-shaped mounting connected to the flange (11) of the cultivator shaft (10). The teeth (6, 7, 8 or 22) may be incorporated directly into the flat portion or blade (4 or 5) part of the tool, or made fast to the L-shaped mounting independently of the actual hoe-blade.

Abstract: Tilling apparatus disclosed has a rotor shaft with axially spaced multiple tine and hub assemblies having hoe portions of adjacent tines overlapping one another. The apparatus is constructed as a central section and has wing sections pivotally connected to the central section. A first pivot axis for each wing section is the same horizontal plane as the rotor shaft. A first link connects at its lower end to the wing section at the first pivot axis and at its upper end to the central section at a second pivot axis. A thrust link driven by a two-way cylinder moves the wing section about the first pivot axis and then about the second pivot axis. Each tine hub is made in two half-bodies supporting two tines at 90 degrees, with a recess to turn adjacent hubs 30 degrees to one another. Each tine has a bevel on the outer side and a smooth hard surface on the inner side.

Abstract: A tool for an earthworking machine in which the machine has a rotor with one or more support plates mounted in an axially distributed relation with each plate carrying one or more earthworking tools in circumferentially distributed relation. Each tool extends radially outwardly from the respective plate and at the outer end has an earthworking portion extending transversely to the plane in which the tool rotates. The forward working portion comprises a foremost impact region and a cutting edge that slopes rearwardly from the direction of rotation as the edges extend away from the impact region.

Abstract: A soil cultivating machine includes a frame and a plurality of cultivating members in one or more groups journalled to said frame. Each group is driven to rotate about a horizontal shaft extending substantially transverse to the direction of machine travel. The groups of cultivating members are preferably arranged in at least two groups located side-by-side and pivotable about transverse pivots to move vertically against spring opposition to avoid obstacles. Each cultivating member is made of semicircular plates fastened to rings on the horizontal shaft and the plates can have cuts that divide them into segment parts. The outer working portions of the plates can be offset so that neighboring members work paths that overlap or are closely adjacent one another. Each group has respective side plates and a hood supported by the plates and the hood is interconnected to the frame with a spring-loaded rod.