having reference particularly to fig1 and 2 , the apparatus of the present invention comprises a main frame , shown generally at 10 , which is formed from a plurality of parallel longitudinal members 11 to which a series of tool bars 12 , 14 and 16 are affixed , as by welding or bolting or other securing arrangement . the number of longitudinal members used in the apparatus will be determined by the overall width of the apparatus . it is contemplated that the apparatus may plant from 4 rows to 12 rows or more , which will require an overall width of from 7 feet to 25 feet or more . preferably , the forwardmost portion of each of the longitudinal members 11 is joined to the forward tool bar 12 , hereinafter referred to as the first chisel plow tool bar 12 . a second tool bar ( adapted to mount the second row of chisel plows ) 14 , and rear tool bar 16 ( adapted to mount the planter units ) are secured to the longitudinal members 11 , in sequence to the rear of the tool bar 12 . at the forward end of the main frame is a hitch end of the main frame is a nitch member shown generally at 20 . the hitch member 20 serves as a point of attachment wherein the apparatus of the present invention is attached to the prime mover for movement through the field , but more importantly the forward hitch member 20 serves as a portion of the elevation adjustment means by which the elevation of the front of main frame 10 may be adjusted during the operation of the equipment . as is shown in fig1 the tongue portion of the forward hitch may have provision for rough adjustment by changing the position of pin 21 , but it is essential that during operation the tongue be rigid and hold in a fixed attitude with respect to the main frame . the forward hitch member 20 preferably comprises a y - shaped draw bar 22 , which may be conveniently welded to the bottom side of tool bar 12 and butt welded to the forward side of tool bar 12 . the forward portion of the hitch member 20 is a forward tongue 24 which is equipped with fitting 26 , adapted to engage a conventional three - point hitch mounted on the rear of the tractor prime mover . in the embodiment shown in fig1 it is essential that the hitch 20 comprise a draw bar 22 which is rigidly mounted to the main frame with respect to elevational movement . in this manner , when the three - point hitch 20a mounted on the tractor is actuated by hydraulic cylinder 20b , the elevation of the front portion of the main frame may be adjusted accurately and quickly to the desired operating level , i . e ., the depth at which the chisel plows are set . although it is possible to fabricate forward hitch 20 which is based on a draw bar with a single stem , the y - shaped draw bar 22 , as shown in fig2 is preferred . if desired , the front hitch 20 may comprise a draw bar with three or more points of attachment 20c , 20d , 20e to the main frame 10 , 11 , 12 , 14 , depending upon the width of the main frame as shown in fig2 . mounted at the rear of the main frame 10 is a shaft 30 on which are mounted a plurality of rear support wheels 32 . rear support wheels 32 are mounted on arm 34 which is affixed to shaft 30 , the attitude of which is determined by control arm 36 which in turn is controlled by hydraulic cylinder 38 and hydraulic piston 39 . in the embodiment shown in fig2 four rear support wheels 32 are mounted on shaft 30 , but the actual number used will depend upon the width of the tiller planter unit . the attitude of the arm 34 and the resultant position of rear support wheels can be controlled by a single cylinder 38 , as is shown in fig2 or a plurality of hydraulic cylinders , operated by a single control mechanism , can be used to control the attitude of control arm 36 , which in turn controls arm 34 and the height of rear support wheels 32 . as is shown in phantom in fig3 the hydraulic unit 38 may be used to lower the rear support wheels sufficiently to raise the rear end of the tiller planter unit completely off the ground in order to move over obstacles or travel on the road . mounted on forward tool bars 12 and 14 are a plurality of chisel plows 40 . as is shown in fig2 the chisel plows are mounted in staggered relationship with one another . preferably the plows are in alternating relationship , as is shown in fig2 but other forms of staggered relationships may be used . plows 40 are mounted on tool bars 12 and 14 using conventional means , such as mounting bolts 42 . as was mentioned above , spring mounted chisel plows are preferred , but in view of the increased cost of spring mounted plows , conventionally mounted plows may be used , particularly in soil containing little or no rocks . the chisel plows 40 are preferably fitted with interchangeable plow tips 44 of conventional design . as is known to those skilled in the art , the configuration of the plow tip used is determined by the type of soil being plowed , the type of plowing action desired , and the moisture content of the soil at the time of the plowing . mounted to the rear of the chisel plows 40 is reel unit shown generally at 50 . as is shown in fig1 and 2 , the reel unit comprises central shaft 52 which is surrounded by a plurality of helical blades 54 , which are fashioned in a manner similar to a reel lawnmower , which blades are held in fixed relationship to each other by spacers 56 which retain blades 54 in radial position with respect to shaft 52 . the reel unit 50 is located within housing 60 on reel bearing 58 in which central shaft 52 turns . the reel housing 60 is attached to a plurality of arms 62 which are pivotally connected to the longitudinal members 11 of main frame 10 through bracket 66 and pin 64 . when so mounted , reel unit 50 is urged downwardly by one or more springs 68 . the downward movement of reel unit 50 is limited by limiting member 69 , which may take the form of a chain , a cable , or an adjustable bar . the springs and the amount of thrust applied thereby which urges the reel units and the roller units downwardly , may be varied according to soil conditions and the particular configuration of reel and roller used . however , for the six row units described in the drawings , it has been found that good results are obtained using four auto coil springs on each of these units . mounted to the rear of the reel unit 50 is roller unit shown generally at 70 . the roller unit 70 comprises roller 72 , which in turn may comprise a series of individual rollers 73 which take on the form of a corrugated roller as is shown in fig2 . other conventional roller designs may also be used . the roller unit 70 includes a central shaft 74 which rotates in bearing 76 within roller housing 78 . the roller housing 78 is connected to arms 80 which is pivotally attached to longitudinal member 11 of main frame 10 through pin 82 and bracket 84 . roller unit 70 is urged downwardly by one or more springs 86 , but the downward movement of the roller means is limited by limiting means 88 , which may comprise a chain , a cable , or adjustable rod means . preferably , a plurality of liquid fertilizer injection knives 90 are mounted on the forward portion of roller housing 78 . the knives 90 may be conventional knives designed for injecting anhydrous ammonia fertilizer into the soil . knives 90 are preferably mounted on the roller housing 78 with pivot means 92 , whereby the knives can be pivoted to a non - operative position when planting crops which do not require liquid fertilizer . it is also desired that the pivot means 92 be vertically adjustable in order to control the depth at which the anhydrous fertilizer is injected . since the knives 90 are mounted on roller housing 78 , their depth of penetration is fixed with relation to the level of roller 70 , which determines the level of the soil for the seed bed . as is explained below , it is necessary to space the injection knives 90 between the planter units 100 , in order to inject the anhydrous fertilizer between the seed rows . optionally , mounted on the rear portion of roller housing 78 are a plurality of disc hillers 94 for the purpose of forming furrows in the prepared seed bed . preferably the disc hillers 94 are pivotally mounted at 96 in a manner which enables the hiller to be readily placed in a non - operative position . alternatively , the disc hillers 94 may be mounted in a manner which will facilitate their easy removal and replacement . the disc hillers may be arranged to form furrows , or alternatively , hills upon which the seeds are sown , depending upon the type of crop and desires of the farmer . the planter units are shown generally at 100 . the planter units 100 are rigidly mounted to tool bar 16 on the rear end of main frame 10 . as is shown in fig3 when the rear support wheels 32 are lowered , the rear end of main frame 10 is raised , thereby raising planter unit off the ground . the planter units may comprise one or more conventional planters , as is shown in fig2 or , as is mentioned above , a single multiple row planter unit may be employed . generally speaking , the planter units comprise the soil opener 102 , a seed bin 104 with a mechanism to drop seeds at a selected rate into the opened soil ( not shown ) which is then followed by the seed press wheel 106 , which carries out the function of covering the seed with soil and pressing the soil over the seed . the planter units used in the present invention are preferably driven through contact of the seed press wheel 106 with the ground . in other words , as the planting unit moves through the field , seed press wheel 106 rotates , which operates the mechanism which drops the seed from bin 104 into the ground . when this preferred embodiment is employed the planter unit 100 discontinues the dropping of seed into the ground , when the planter unit 100 is raised above ground level . as was mentioned above and as is more clearly shown in fig2 the planter units 100 are located in intervals between the anhydrous injection knives 90 so that the seeds being planted by the planter unit will not be planted immediately on top of the freshly injected nitrogen or other liquid fertilizers . when the tiller planter unit of the present invention is to be used with a prime mover tractor which has a stationary draw bar attachement , i . e ., it does not have an arrangement which permits elevational adjustment of the hitch from the tractor cab , the embodiment shown in fig4 should be used . as is shown in fig4 the draw bar hitch 110 is pivotally attached to tool bar 14 using bracket 112 and pivot pin 114 . the elevational adjustment of draw bar 110 is controlled by hydraulic cylinder 116 which is pivotally attached to tool bar 12 or to another portion of the main frame 10 . hydraulic piston 118 is pivotally attached to the forward portion of draw bar 110 whereby the pitch of draw bar 110 can be regulated with respect to the attitude of main frame 10 . draw bar 110 is pivotally connected to tractor hitch 120 . thus , by controlling the amount of hydraulic fluid applied to hydraulic cylinder 116 , the elevation of the forward end of the frame 10 can be controlled from the tractor cab . in the preferred embodiment the tillage planter unit of the present invention is equipped with one or more tanks 130 which serve as liquid fertilizer tanks . such tanks may be connected to liquid fertilizer injector knives 90 and controlled from the cab of the tractor , whereby the liquid nitrogen is continuously injected into the soil through knives 90 during the planting operation , but is discontinued when the planter tillage unit is raised by actuating rear support wheels 32 . in an additional embodiment , a tank located on the upper side of main frame 10 , such as tank 130 , may be used to hold herbicides . the herbicides may be applied following the planting operation through nozzel 132 . alternatively , the herbicides can be applied ahead of the roller assembly 70 or ahead of the chisel plows 40 , depending upon the type of herbicide and the type of seed being planted . alternatively , in lieu of tanks 130 mounted on main frame 10 , the liquid fertilizer or herbicide may be placed in one or more towed tank wagons , not shown , and pulled by the tiller planter through tongue 134 connected to the main frame with hitch 136 . the tiller planter of the present invention may be made in a six row unit , as is illustrated in the drawings , or it may be made in a wider or more narrow unit . for instance , units which plant from 10 to 12 rows are contemplated . it has been found that the six row unit shown in the drawings will plant from 60 to 80 acres per day operating at from 4 to 7 miles per hour , when such crops as soybeans or corn are planted using 20 inch rows . using conventional techniques , about 21 / 2 days would be required to plant such an acreage . it is found desirable to operate the unit at from 4 to 7 miles per hour . if the unit is moved too slowly through the field , the reel unit will not pulverize the dirt properly and an uneven seed bed is obtained . in addition to the obvious savings of time , accomplishing the tilling and planting in a single pass through the field saves at least 50 % of the required fuel . the tiller planter unit of the present invention provides flexibility which is essential to successful operation . for instance , when the unit is pulled through a transverse drainage ditch , the front portion of the main frame is raised in order to lift the chisel plows above the ground level and thereby avoid filling the drainage ditch with dirt and trash . although the plows have been lifted , the rear portion of the main frame is desirably left at its operating height , whereby the unit continues the planting and fertilization of the ditch . since the reel and roller units are preferably mounted on independently moving arms , both of these units remain in contact with the soil , and break up the soil sufficiently to permit planting of the seed . since crops are thereby actually planted in the ditch , errosion of the drainage ditch is minimized . the present invention also contemplates the application of broadcast chemicals for weed control in addition to the liquid herbicides described above . for instance , the broadcast type of pre - emerging weed control chemicals , some of which must be worked into the soil , can be applied ahead of the plow units . in such a case , the chemicals are plowed , subjected to the reel and rolling operations in order to thoroughly work the chemicals into the soil . application of the herbicides in the same operation as the tilling and planting is advantageous , in that there are no tractor tracks in the prepared seed beds . packing of seed beds by the tractor wheels has a tendency to produce a high incident of weeds , which require further cultivation and / or herbicide application . the single pass planting avoids this problem . the forms of invention herein shown and described are to be considered only as illustrative . it will be apparent to those skilled in the art that numerous modifications may be made therein without departure from the spirit of the invention or the scope of the appended claims .
a tractor - drawn machine adapted to perform tilling , seedbed preparation , and planting in a single operation , comprises a frame from which plow units , a reel unit , a roller unit and seed planting units are mounted seriatim . the attitude of the frame may be adjusted during operation in that the operator of the tractor is able to independently adjust the elevation of both the front of the frame and the rear of the frame .