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Claim 1

IN APPARATUS FOR THE SUBSURFACE DISCHARGING OF AGRICULTURAL CHEMICALS AND WHICH INCLUDES A GROUND ENGAGING KNIFE FOR OPENING A TRENCH OR FURROW IN THE SOIL AS IT IS MOVED OVER THE GROUND, THE COMBINATION THEREWITH OF APPARATUS FOR CLOSING SUCH TRENCH OR FURROW COMPRISING: A FRAME DISPOSED IN A TRAILING POSITION RELATIVE TO SAID KNIFE, A PAIR OF SPACED GROUND ENGAGING PADDLE ASSEMBLIES CARRIED BY SAID FRAME SO AS TO BE DISPOSED AT RESPECTIVE OPPOSITE SIDES OF SAID TRENCH, SAID PADDLE ASSEMBLIES EACH INCLUDING A VERTICALLY DISPOSED PLANAR PADDLE MEMBER, A SUPPORT PLATE REMOVABLY SECURED TO SAID KNIFE, A PAIR OF ELONGATED ARMS EACH PIVOTALLY CONNECTED AT ONE CORRESPONDING END AT VERTICALLY SPACED POINTS ON SAID FRAME, THE OTHER CORRESPONDING ENDS OF SAID ARMS PIVOTALLY CONNECTED AT VERTICALLY SPACED POINTS ON SAID SUPPORT PLATE, AND SPRING MEANS EXTENDING BETWEEN ONE OF SAID ELONGATED ARMS AND SAID SUPPORT PLATE TO NORMALLY URGE SAID PADDLE ASSEMBLIES DOWNWARDLY INTO GROUND ENGAGING POSITION.