1. A raking implement comprising: a support; an elongated, relatively thin, continuous strip of flexible material having normally horizontal top and bottom surfaces and being disposed with its longitudinal axis transverse to the path of travel of the implement; a plurality of spaced raking elements depending from said strip; and suspension means loosely attaching said strip to the support whereby the strip readily conforms to changes in the topography of the terrain traversed thereby, each of said elements being U-shaped, presenting a bight secured to said bottom surface of the strip and a pair of spaced blades depending from the bight, each blade having an upright leading edge for effecting a slicing action as the implement is advanced, said strip having a front and a rear longitudinal edge, there being a first row of said elements along said front edge and a second row of said elements spaced rearwardly of said first row for holding the strip generally horizontal transversely thereof during raking.

2. A raking implement comprising: a support; an elongated, relatively thin, continuous strip of flexible material having normally horizontal top and bottom surfaces and being disposed with its longitudinal axis transverse to the path of travel of the implement; a plurality of spaced raking elements depending from said strip; suspension means loosely attaching said strip to the support whereby the strip readily conforms to changes in the topography of the terrain traversed thereby; a plurality of spaced, rigid bars secured to said top surface of the strip transversely thereof, providing weight to yieldably bias the strip downwardly and stiffening the same to preclude flexure of the strip transversely thereof, each of said elements being U-shaped, presenting a bight secured to said bottom surface of the strip and a pair of spaced blades depending from the bight, each blade having an upright leading ledge for effecting a slicing action as the implement is advanced, there being an element underlying each bar respectively; and releasable fastening means common to each bar and its corresponding element clamping the strip between the bars and said bights.

3. A raking implement comprising: a support; an elongated, relatively thin, continuous strip of flexible material having normally horizontal top and bottom surfaces and being disposed with its longitudinal axis transverse to the path of travel of the implement; a plurality of spaced raking elements depending from said strip; suspension means loosely attaching said strip to the support whereby the strip readily conforms to changes in the topography of the terrain traversed thereby; a vehicle; means mounting said support on the vehicle for up-and-down movement relative to the vehicle; resilient means interconnecting the vehicle and the support for limiting the extent of downward movement of the latter; and means connected with the support for raising the latter to a position holding said elements elevated above the terrain, each of said elements being U-shaped, presenting a bight secured to said bottom surface of the strip and a pair of spaced blades depending from the bight, each blade having an upright leading edge for effecting a slicing action as the implement is advanced, said strip having a front and rear longitudinal edge, there being a first row of said elements along said front edge and a second row of said elements spaced rearwardly of said first row for holding the strip generally horizontal transversely thereof during raking.

7. A raking implement comprising: a support including a pair of elongated, laterally spaced apart members extending transversely to the normal path of travel of the implement; an elongated, relatively thin, continuous strip of flexible material having normally horizontal top and bottom surfaces and being disposed between said members with its longitudinal axis extending parallel to the members; a plurality of spaced raking elements depending from said strip; first flexible suspension means attaching said strip to one of said members whereby the strip readily conforms to changes in the topography of the terrain traversed thereby; and second flexible suspension means attaching said strip to the other of said members whereby the strip is supported in both lateral directions by said support and is held against tilting about its longitudinal axis when the elements dig into the terrain during advancement of the implement.