referring to fig1 - 3 , a crop residue conditioning and incorporation implement , a primary tillage system , or a tillage device in accordance with the present invention is generally designated by the reference numeral 10 . tillage device 10 includes frame 12 extending along central axis 42 and has a first end incorporating hitch 14 that is adapted to operatively connect tillage device 10 with a drawbar of tow vehicle 128 , fig7 . frame 12 includes a plurality of spaced longitudinally frame elements 13 a - 13 d that are generally parallel to central axis 42 and that are interconnected by a plurality of cross frame members 15 a - 15 c , transverse thereto . the rearward ends of frame elements 13 b and 13 c are interconnected by rear cross frame member 15 d and the forward ends of frame elements 13 b and 13 c are interconnected by cross frame member 15 e . as shown , hitch 14 is connected to forward cross frame member 15 e by first and second hitch frame members 17 and 19 , respectively . more specifically , the first ends of first and second hitch frame members 17 and 19 , respectively , are operatively connected to hitch 14 . the second ends of first and second hitch frame members 17 and 19 , respectively , diverge from each other and are operatively connected to cross frame member 15 e . hitch 14 is further connected to frame 12 by a leveling assembly , generally designated by the reference numeral 23 . leveling assembly 23 includes first and second support arms 25 and 27 , respectively , interconnect to corresponding frame element 13 b and 13 c , respectively . leading ends 25 a and 27 a of support arms 25 and 27 , respectively , are pivotably connected to pivot mechanism 29 which is pivotably supported on first and second hitch frame members 17 and 19 , respectively . turnbuckle 31 has a first end 31 a pivotably connected to pivot mechanism 29 and a second end 31 b pivotably connected to the leading ends of first and second hitch frame members 17 and 19 , respectively , through mounting bracket 33 . hydraulic cylinders 9 a and 9 b are operatively connected to an actuator switch ( not shown ) provided in the cab of tow vehicle 128 , fig7 , that controls movement of hydraulic cylinders 9 a and 9 b between extended and retracted positions . it is intended for leveling assembly 23 to maintain the levelness of frame 12 with respect to a supporting surface , such as field surface 11 . more specifically , under operator control , leveling assembly 23 raises and lowers the leading end of frame 12 relative to field surface 11 about wheel assemblies 38 and 40 . the position of the leading end of frame 12 is adjusted by extending or retracting hydraulic cylinders 9 a and 9 b under operator control . as is conventional , frame 12 is supported above field surface 11 , by first and second sets of wheel assemblies 38 and 40 , respectively . as best seen in fig2 , wheel assemblies 38 and 40 include corresponding sets of offset wheels 39 and 41 , respectively . first wheel assembly 38 of tiller device 10 is offset from a first side of central axis 42 . likewise , second wheel assembly 40 of tiller device 10 is offset from a second side of central axis 42 . it can be appreciated that tillage device 10 is constructed to move along field surface 11 in a working or travel direction , indicated by arrow 16 , to cultivate the field being traversed . wheels 39 and 41 of each wheel assembly 38 and 40 are mounted on arms 43 that are pivotable with respect to frame 12 . more specifically , arms 43 are coupled to frame 12 through hydraulic cylinder 45 and by any suitable linkage 47 that raises and lowers arms 43 upon cylinder actuation and retraction . it is contemplated to operatively connect hydraulic cylinder 45 to an actuator switch ( not shown ) provided in the cab of the tow vehicle that controls movement of hydraulic cylinder 45 between an extended position and a retracted position . wheels 39 and 41 can be raised between a 1 ) lowermost position ; 2 ) a partially raised position to reduce the penetration of shank assemblies 28 and 34 , hereinafter described , or 3 ) a fully raised position for transport . the typical working depth will vary from machine to machine and most often will be between 7 and 8 inches . a depth indicator ( not shown ) may be provided for a quick reference on the operating depth of the implements . a first crop residue conditioner , preferably stalk chopper 18 , is pivotably coupled to frame member 15 a of frame 15 proximate to hitch 14 . stalk chopper 18 includes central hub 21 extending along and being rotatable about a first axis , indicated by axis 22 . axis 22 is generally transverse to device travel direction 16 . a plurality of blades 20 are circumferentially spaced about and project radially from central hub 21 . stalk chopper 18 includes arms extending from opposite ends thereof that are operatively connected to stalk chopper subframe 60 which , in turn , are pivotably connected frame member 15 a of frame 12 a plurality of blades 20 are circumferentially spaced about and project radially from central hub 21 in addition , it is contemplated to operatively connect stalk chopper 18 to fame 12 via a spring system and / or a hydraulic cylinder arrangement , such as hydraulic cylinder 129 , fig7 . the spring system and / or hydraulic cylinder arrangement provide dynamic stability to stalk chopper 18 during operation . as a result , the downward pressure on stalk chopper 18 is optimized without restricting upward movement of stalk chopper 18 when in engagement with an obstruction . further , a hydraulic cylinder arrangement would allow stalk chopper 18 to be raised when not in use or when adverse conditions warrant . it is contemplated to operatively connect the hydraulic cylinder of the hydraulic cylinder arrangement to an actuator switch ( not shown ) provided in the cab of tow vehicle 128 that controls movement of hydraulic cylinder between an extended position and a retracted position , and hence , movement of the stalk chopper between its raised and lowered positions . a second crop residue conditioner , such as first and second sets of cutting disks 35 and 37 , is pivotably connected to cutting disk subframe 64 aft or rearward of stalk chopper 18 . cutting disk actuator 66 and impact arrestor system 68 also interconnect cutting disk subframe 64 and cross frame member 15 a of frame 12 . cutting disk actuator 66 permits cutting disk subframe 64 , and hence first and second sets of cutting disks 35 and 37 , respectively , to be raised and lowered relative to frame 12 to change the cutting depth for a particular cutting depth setting . the cutting depth is adjusted by extending or retracting the hydraulic cylinder of cutting disk actuator 66 . it is contemplated to operatively connect hydraulic cylinder of the cutting disk actuator 66 to an actuator switch ( not shown ) provided in the cab of the tow vehicle that controls movement of hydraulic cylinder of the cutting disk actuator 66 between its extended and retracted positions . impact arrestor system 68 includes carrier springs 49 that assert a yieldable downward pressure on cutting disk subframe 64 , and hence , on first and second sets of cutting disks 35 and 37 , respectively . as such , carrier springs 49 permit limited movement of first and second sets of cutting disks 35 and 37 , respectively , relative to frame 12 to accommodate variations in ground topology or to deflect about immovable obstructions , such as large stones , which may be lying in the travel path of tillage device 10 . each set of cutting disks 35 and 37 , respectively , are provided on opposite sides of central axis 42 of frame 12 . each set of cutting disks 35 and 37 includes a plurality of disks 26 rotatably support on corresponding arms 45 which , in turn , are interconnected to cutting disk subframe 64 . it is intend that the plurality of disks 26 include radially outer edges that ride on field surface 11 during a tillage operation . each disk 26 has a concave surface that is directed away from central axis 42 of frame 12 and may be individually mounted or as part of a gang assembly . the radially outer edges of disks 26 of first set of cutting disks 35 lie in corresponding planes that are generally parallel to each other and are at a predetermined acute angle to central axis 42 of frame 12 . similarly , the radially outer edges of disks 26 of second set of cutting disks 37 lie in corresponding planes that are generally parallel to each other and are at a predetermined acute angle to central axis 42 of frame 12 . as best seen in fig2 , disks 26 of first set of cutting disks 35 and disks 26 of second set of cutting disks 37 are in a crossing direction relative to travel direction 16 . it is noted that disks 26 of the first and second sets of cutting disks 35 and 37 , respectively , may be individually mounted or in a gang configuration , and may be replaced with coulter disks when desired or when field conditions so dictate . a first plurality of shank assemblies 28 are spaced along and depend from frame member 15 b of frame 12 at a location rearward first and second sets of cutting disks 35 and 37 , respectively , relative to travel direction 16 . each shank assembly 28 includes parabolic shank 53 having a first end mounted to a longitudinally extending beam 55 . ripper point 57 is mounted to the second , bottom end of shank 53 . beam 55 is pivotably mounted to frame member 15 b of frame 12 and biased downwardly by springs 59 . a second plurality of shank assemblies 34 are spaced along and depend from frame member 15 c at a location rearward of frame member 15 c of frame 12 relative to travel direction 16 . each shank assembly 34 includes parabolic shank 61 having a first end mounted on a longitudinally extending beam 63 . ripper point 65 is mounted to the second , bottom end of shank 61 . beam 63 is pivotably mounted to frame member 15 c of frame 12 and biased downwardly by springs 67 . the second plurality of shank assemblies 34 are indexed relative to the lines of travel of ripper points 57 of the first plurality of shank assemblies 28 to effect a so - called “ split the middle ” ripper point pattern , which provides for uniform ridges to be formed as tillage device 10 travels over field surface 11 . the first plurality of shank assemblies takes a full cut of the soil and leaves alternating strips of untilled soil . the second plurality of shank assemblies 34 till the untilled strips left by the first plurality of shank assemblies 28 . as described , by laterally offsetting the first and second pluralities of shank assemblies 28 and 34 , respectively , a greater path of soil may be tilled with each pass of tillage device 10 . it is noted that the first and second pluralities of shank assemblies 28 and 34 , respectively , may have a number of different constructions and configurations without deviating from the scope of the present invention . harrow section 44 is pivotably attached frame elements 13 b and 13 c at location rearwardly of and adjacent to cross frame member 15 c of frame 12 . harrow section 44 includes a harrow subframe 69 supporting a plurality of leveling tools 48 . harrow subframe 69 includes a pair of support beams 71 transverse to central axis 42 of tillage device 10 . each leveling tool 48 includes a generally c - shaped arm 73 suspended from an associated support beam 71 . leveling shank 75 is mounted to the second , bottom end of arm 73 . it is intended for leveling shanks 75 to be indexed to the first and second pluralities of shank assemblies 28 and 34 , respectively , in order to provide proper leveling of field surface 11 . harrow subframe 69 is also interconnected to frame element 13 b of frame 12 by harrow actuator 76 . harrow actuator 76 may be used to position harrow subframe 69 , and hence leveling tools 48 , relative to frame 12 . more specifically , harrow actuator 76 permits harrow subframe 69 , and hence leveling tools 48 , to be raised and lowered relative to frame 12 to change the positions of leveling tools 48 with respect to field surface 11 . the positions of leveling tools 48 are adjusted by extending or retracting the hydraulic cylinder of harrow actuator 76 . it is contemplated to operatively connect the hydraulic cylinder of harrow actuator 76 to an actuator switch ( not shown ) provided in the cab of the tow vehicle that controls movement of the hydraulic cylinder of harrow actuator 76 between its extended and retracted positions . it is contemplated to provide wing mounting flanges at terminal ends of cross frame member 15 b of frame 12 in order to connect optional wing sections to tillage device 10 . understandably , the optional wing sections may be equipped with implements similar to those of tillage device 10 . as a result , the optional wing sections allow tillage device 10 to provide a wider worked area per pass over field surface 11 . in operation , hitch 14 of tillage device 10 is interconnected in a conventional manner to a tow vehicle . wheels 39 and 41 of wheel assemblies 38 and 40 are positioned by an operator to a desired position , namely , 1 ) its lowermost position ; 2 ) the partially raised position to reduce the penetration of shank assemblies 28 and 34 or 3 ) a fully raised position for transport . under operator control , leveling assembly 23 raises and lowers the leading end of frame 12 relative to field surface 11 about wheel assemblies 38 and 40 so as to level frame 12 . in order to position stalk chopper 18 to frame 12 , an operator engages the actuator switch in the cab of the tow vehicle so as to move the hydraulic cylinder of the hydraulic cylinder arrangement ( if present ) to a desired position , as heretofore described . similarly , the operator engages the corresponding actuator switch in the cab of the tow vehicle so as to actuate the cutting disk actuator 66 and move the first and second sets of cutting disks 35 and 37 , respectively , to a desired cutting depth . finally , the operator engages the corresponding actuator switch in the cab of the tow vehicle so as to actuate the harrow actuator 76 and change the positions of leveling tools 48 with respect to field surface 11 , as heretofore described . the independent positioning of stalk chopper 18 , the first and second sets of cutting disks 35 and 37 , respectively , and harrow section 44 allows an operator to configure tillage device 10 for a plurality of working conditions . that is , the independent positioning of each of the stalk chopper , cutting disk , and harrow section relative to a field surface , allows the operator to control the operating or penetration depth of each individual implement of tillage device 10 . once frame 12 and the implements of tillage device 10 are properly positioned by an operator , it is contemplated for the tow vehicle to tow tillage device 10 over field surface 10 in travel direction 16 . as tillage device 10 traverses a field in travel direction 16 , stalk chopper 18 rotates thereby severing crop residue passed thereunder . accordingly , stalk chopper 18 provides a first conditioning of residual crop materials . as tillage device 10 continues to travel in direction 16 , disks 26 of the first and second sets of cutting disks 35 and 37 , respectively , provide a second conditioning , or cutting of the crop residue . disks 26 of the first and second sets of cutting disks 35 and 37 , respectively , condition the crop residue in a crossing direction , indicated by arrows 51 and 77 , respectively , at corresponding predetermined acute angles 50 and 79 , respectively , to central axis 42 of frame 12 . as heretofore described , the first and second sets of cutting disks 35 and 37 , respectively , include equal numbers of disks 26 facing in opposite directions to reduce the transverse travel direction forces associated with movement in tillage device along travel direction 16 . as tillage device 10 continues to move in travel direction 16 , the twice - conditioned crop residue is mixed with a desired depth of the soil profile by a first plurality of shank assemblies 28 . ripper points 57 of the first plurality of shank assemblies 28 fracture and upturn a desired depth of the soil profile and mix the two - direction conditioned crop residue with the upturned soil materials . incorporation of the soil residue with the material of the soil profile beneficially aerates the soil for subsequent planting or field conditioning and enhances soil to crop residue contact , thereby encouraging crop residue decomposition . similarly , as tillage device 10 continues to move in travel direction 16 , the second plurality of shank assemblies 34 till the untilled strips left by the first plurality of shank assemblies 28 . as heretofore described , by laterally offsetting the first and second pluralities of shank assemblies 28 and 34 , respectively , a greater path of soil is tilled with each pass of tillage device 10 . in addition , it can be appreciated that the construction of tillage device 10 allows for the generally uniform soil tillage and crop residue incorporation across the width thereof . after the conditioned crop residue has been incorporated with the material of the soil profile , leveling shanks 75 of the first and second pluralities of shank assemblies 28 and 34 , respectively , of harrow section 44 further fractures the upturned soil materials and levels the soil materials for subsequent field operations such as planting or other conditioning , such as fertilizing . as heretofore described , leveling shanks 75 are indexed to the first and second pluralities of shank assemblies 28 and 34 , respectively , in order to provide proper leveling of field surface 11 . referring to fig4 - 6 , an alternate embodiment of a tillage device in accordance with the present invention is generally designated by the reference numeral 100 . it can be appreciated that tillage device 100 is substantially identical in structure to tillage device 10 , heretofore described . as such , the prior description of tillage device 10 is understood to describe tillage device 10 except as hereinafter provided . tillage device 100 includes leveling implement 102 unlike harrow section 44 of tillage device 10 . leveling implement 102 is pivotably attached frame elements 13 b and 13 c at location rearwardly of and adjacent to cross frame member 15 d of frame 12 . leveling implement 102 includes a leveling subframe 104 supporting first and second sets of leveling disks 106 and 108 , respectively . leveling subframe 104 includes a support beam 110 transverse to central axis 42 of tillage device 100 . each set of leveling disks 106 and 108 is provided on opposite sides of central axis 42 of frame 12 and includes a plurality of leveling disks 112 rotatably support on corresponding arms 114 which , in turn , are interconnected to leveling subframe 104 . it is intended that the plurality of leveling disks 112 include serrated radially outer edges that ride on field surface 11 during a tillage operation . each leveling disk 112 has a concave surface that is directed away towards central axis 42 of frame 12 . it is noted that the radially outer edges of leveling disks 112 of first set of leveling disks 106 lie in corresponding planes that are generally parallel to each other at a predetermined acute angle to central axis 42 of frame 12 . similarly , the radially outer edges of leveling disks 112 of second set of leveling disks 108 lie in corresponding planes that are generally parallel to each other at a predetermined acute angle to central axis 42 of frame 12 . as best seen in fig5 , leveling disks 112 of first set of leveling disks 106 and leveling disks 112 of second set of leveling disks 108 are in a non - crossing direction relative to travel direction 16 . leveling subframe 104 is also interconnected to frame element 13 b of frame 12 by leveling actuator 115 . leveling actuator 115 may be used to position leveling subframe 104 , and hence leveling disks 112 , relative to frame 12 . more specifically , leveling actuator 115 permits leveling subframe 104 , and hence leveling disks 112 , to be raised and lowered relative to frame 12 to change the positions of leveling disks 112 with respect to field surface 11 . the positions of leveling disks 112 are adjusted by extending or retracting the hydraulic cylinder of leveling actuator 115 . it is contemplated to operatively connect the hydraulic cylinder of leveling actuator 115 to an actuator switch ( not shown ) provided in the cab of the tow vehicle that controls movement of the hydraulic cylinder of leveling actuator 115 between its extended and retracted positions . referring to fig5 , it is contemplated to provide wing mounting flanges 118 at terminal ends of cross frame member 15 b of frame 12 in order to connect optional wing sections 119 to tillage device 100 . understandably , optional wing sections 119 may be equipped with implements similar to those of tillage device 100 . as a result , tillage device 100 would provide a wider worked area per pass over field surface 11 . referring to fig7 , a schematic representation of an exemplary control system 121 for tillage devices 10 and 100 is generally designated by the reference numeral 121 . control system 121 includes a plurality of actuator switches housed in tow vehicle 128 that control communication of corresponding implement actuators with a hydraulic fluid source within tow vehicle 128 . by way of example , input line 120 is operatively connected to hydraulic cylinder 129 that operatively connects the stalk chopper 18 to frame 12 ; input line 122 is operatively connected to hydraulic cylinders 45 of wheel assemblies 38 and 40 which , in turn , are operatively connected to hydraulic cylinders 9 a and 9 b of leveling assembly 23 ; input line 124 is operatively connected to hydraulic cylinder of the cutting disk actuator 66 ; and input line 126 is operatively connected to hydraulic cylinder of harrow actuator 76 ( or the hydraulic cylinder of leveling actuator 115 for tillage device 100 ). in addition , hydraulic cylinders 9 a and 9 b of leveling assembly 23 , and hence hydraulic cylinders 45 of wheel assemblies 38 and 40 , are operatively connected to the fluid source within tow vehicle 128 through return lines 130 and 131 , respectively ; the hydraulic cylinder of cutting disk actuator 66 is operatively connected to the fluid source with tow vehicle 128 through return line 134 ; the hydraulic cylinder of harrow actuator 76 ( or the hydraulic cylinder of leveling actuator 115 for tillage device 100 ) is operatively connected to the fluid source with tow vehicle 128 through return line 136 ; and hydraulic cylinder 129 of stalk chopper 18 is operatively connected to the fluid source within tow vehicle 128 through return line 137 . as heretofore described , it can be appreciated that actuation of an operator selected actuator switch housed in tow vehicle 128 controls the fluid flow to and from corresponding hydraulic cylinders through the input and return lines , and hence , movement of a corresponding hydraulic cylinder between its retracted and extended positions . in those applications where tillage devices 10 and 100 include foldable wing sections 119 , control system 121 may include an actuator switch housed in tow vehicle 128 that controls communication of corresponding wing section actuators 140 and 142 with the hydraulic fluid source within tow vehicle 128 . more specifically , input line 138 and return line 144 are operatively connected to the hydraulic cylinders of wing section actuators 140 and 142 . it is contemplated that actuation of an operator selected actuator switch housed in tow vehicle 128 controls the fluid flow to and from corresponding hydraulic cylinders of wing section actuators 140 and 142 through the input and return lines 138 and 144 , respectively , and hence , movement of the hydraulic cylinders between their retracted and extended positions . it can be appreciated that the hydraulic cylinders of wing actuators 140 and 142 extend and / or retract the wing sections 119 . it can be appreciated control system 121 may utilize mechanical , pneumatic , or electrical controls , instead of the hydraulic system disclosed herein , without deviating from the scope of the present invention . for example , the hydraulic cylinder heretofore described may be replaced by electrical devices , such as motors ; pneumatic devices , such as pneumatic rams ; or other mechanical means , such as manually adjustable linkages or assemblies . various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter that is regarded as the invention .
an agricultural tillage implement constructed to condition crop residue and cultivate the conditioned crop residue . the tillage implement includes a first residue conditioner and a second residue conditioner pivotably attached to a frame of the tillage implement . the first and second conditioners are movable independent of each other and of the frame such that an operator may raise and lower the first and second conditioners relative to the frame to change the depths of the conditioners .