This picture is of an OC3 with a " jet trencher".
Here's the link of the page it came from: http://www.fao.org/docrep/x5378e/x5378e08.htm
Apparently, this is some type of Agriculture report from Europe.
Thought you might want to include it in the " Photo Album".
Reguards, Jim Novo
Click on picture for larger view.