Earth shaping implement

Claim 1

AN AGRICULTURAL IMPLEMENT FOR FORMING A BASIN IN THE GROUND AND A SUBSTANTIALLY COMPACT RIDGE OF EARTH CIRCUMSCRIBING THE BASIN COMPRISING A FRAME ADAPTED TO BE SUPPORTED IN ELEVATIONALLY SPACED RELATION TO THE GROUND; ROTARY MOUNTING MEANS ROTATABLY BORNE BY THE FRAME FOR ROTATION ABOUT AN UPRIGHT AXIS OF ROTATION; A PLURALITY OF CONCAVO-CONVEX DISKS HAVING RESPECTIVE INDIVIDUAL AXES AND PERIPHERAL EDGES SUBSTANTIALLY RESPECTIVELY CONCENTRIC TO SAID INDIVIDUAL AXES, AND CONCAVE EARTH ENGAGING SURFACES; MEANS SUPPORTING THE DISKS ON THE MOUNTING MEANS IN RADIALLY OUTWARDLY AND CIRCUMFERENTIALLY SPACED RELATION TO SAID AXIS OF ROTATION WITH SAID INDIVIDUAL AXES OBLIQUELY ANGULARLY RELATED TO RESPECTIVE IMAGINARY LINES RADIALLY EXTENDED FROM SAID AXIS OF ROTATION AND INTERSECTING RESPECTIVE ONES OF SAID INDIVIDUAL AXES, AND WITH THEIR CONCAVE SURFACES FACING IN A GENERALLY COMMON DIRECTION CIRCUMFERENTIALLY OF SAID AXIS OF ROTATION; AND A ROLLER SUPPORTED ON THE MOUNTING MEANS IN SUBSTANTIALLY RADIAL RELATION TO SAID AXIS OF ROTATION AND IN FORWARDLY SPACED RELATION TO THE CONCAVE SURFACE OF ONE OF THE DISKS WITH RESPECT TO THE DIRECTION OF ROTATION OF SAID DISKS ABOUT SAID AXIS OF ROTATION WHEREBY THE ROLLER RIDES OVER AND COMPACTS THE RIDGE FORMED BY THE DISKS.