Sentence:  The dryland <WSD>sodder</WSD> strips the top layer of soil and vegetation (sod, soil, shrubs and small trees) from areas to be surface mined and places it intact over reshaped areas. The soil layer is scooped into the <WSD>sodder</WSD> and transported to the reclamation area. It is removed by tilting and shaking the bucket while slowly moving the loader backward... A conveyor system is being developed for the bottom of the dryland <WSD>sodder</WSD> to aid loading and unloading the sod strips... 
Meaning of the word marked with <WSD> tags:  An agricultural implement for scooping or stripping a layer of topsoil and picking it up intact to lay it down as a cover growth or lawn elsewhere.