revolving ground preparing elements or pins 3 and the backhoe cavity facing forward this is illustrated for clarity and ease of illustration the cavity as indicated by number 25 may face rearwardly towards the boom and driver operator of the apparatus this latter orientation would be more in keeping a backhoe digging procedure however it is important to note that the revolving ground preparing elements such as blades 4 may take the form of removable conical pins the elements 4 break up the ground immediately ahead of the bucket ledge 24 so that the scarifier can load the broken up soil directly into the cavity 25 of the bucket the elements are powered so that hard ground is readily broken up into soil during a clarifying procedure so that the edge 24 immediately follows to pick up the soil for deposit into the cavity 25 it is to particularly noted that not only can the individual tooth 4 be readily replaced after wear but the teeth 30 attached to the end pieces 33 and 34 may be readily changed by removing the lock pin 38 and pulling the teeth outward from its splined connection thus maintenance and repair is greatly simplified maintenance and repair is further augmented by the user.