Assembly for subsurface application of nutrient

Claim 1

A NUTRIENT APPLICATOR ASSEMBLY COMPRISING A MAIN FRAME ADAPTED TO SUPPORT A NUTRIENT TANK AND TO BE ATTACHED TO A TRACTOR HAVING A REARWARDLY DISPOSED ADJUSTABLE TOW BAR SUPPORTING A PLURALITY OF SPACED NUTRIENT APPLICATING MEANS OPERABLY CONNECTED TO SAID TANK AND MOUNTED TO SAID TOW BAR BETWEEN SAID TRACTOR AND SAID MAIN FRAME FOR SUBSURFACE APPLICATION OF THE NUTRIENT, SAID MAIN FRAME INCLUDING A CROSS MEMBER TRANSVERSE TO THE LONGITUDINAL AXIS AND A SINGLE FORWARD AXLE UNIT FOR SUPPORTING A FRONT WHEEL HAVING A TURNING RADIUS OF 120* AND A PAIR OF REAR AXLE UNITS FOR SUPPORTING A PAIR OF REAR WHEELS ADAPTED TO PROPEL THE MAIN FRAME OVER THE GROUND, SAID FORWARD AND REAR AXLE UNITS PROVIDING A TRI-CYCLE SUPPORT FOR SAID MAIN FRAME, SAID FORWARD AXLE UNIT INCLUDING AN AXLE FRAME FOR ROTATABLY SUPPORTING SAID FRONT WHEEL TO SAID MAIN FRAME, EACH OF SAID REAR AXLE UNITS INCLUDING A REAR AXLE FRAME SLIDINGLY SUPPORTED TO SAID MAIN FRAME, MEANS FOR ADJUSTABLY SLIDING SAID REAR AXLE FRAMES TRANSVERSELY OF THE LONGITUDINAL A AXLE THEREOF, SAID MEANS INCLUDING A THREADED MEMBER THREADINGLY ENGAGING EACH REAR AXLE FRAME AND ROTATABLY SUPPORTED TO SAID CROSS MEMBER ON OPPOSED SIDES TO EFFECT ADJUSTMENT OF THE WHEEL CENTERS OF THE REAR WHEELS UPON ROTATION OF THE THREADED MEMBERS AND MEANS FOR RIGIDLY SECURING THE REAR AXLE FRAMES TO SAID MAIN FRAME IN A SELECTED POSITION FOR PRE-PLANT AND SIDE DRESS APPLICATION OF THE NUTRIENT.