Abstract: A chopping apparatus for cultivating crop fields that mounts to at least one of the wheels of an agricultural vehicle, tractor or like vehicle comprising a plurality of blades attached to a plurality of spaced arms. The plurality of spaced arms extend outwardly and lock in a fully extended position to consecutively chop foliage and thereafter scoop, plunge and generally penetrate field soil when the agricultural vehicle is in motion and the corresponding wheel is rotating. A second locked arm position accommodates vehicle transportation by retracting the blades inwardly and proximate a center portion of the agricultural vehicle wheel. Each arm is spring biased to facilitate blade impact with a rigid object, such as a rock or the like, by allowing each arm to travel inwardly when a substantial force is imparted on any of the blades.