Idea for Lubricated Farm Plow - Save Fuel?

How about a lubricated farming plow to save tractor fuel?  This could be achieved by a regular plow or disc with holes to extrude a lubricant.  The lubricant could be water, lubricating fluids, biodegradable oils, maybe even air, etc.
Perhaps a good lubricant for this might be extruding used animal fat from food preparation.  Currently, this is a waste product and just hauled away from restaurants, food processors, etc.  Now, this fat sludge could have another use - make the plow slide through the ground easier, plus add fertilizing nutrients.
There are currently farming discs that have liquid manure nozzles attached.  This concept puts down the "groundwork" for this new plow concept.
The plow construction could be similar to those today, except for a hollow core for the lubricant and holes in the plow walls for the lubricant to exude.  Flow control valves could control the amount of lubricant going out the plow face.  The farmer could control the amount of lubricant depending on the soil conditions.
Possible Start Building Blocks –

• Existing apparatus for farm plows, farm discs, liquid manure spreading, air hockey, industrial processes using lubricated folding boards, etc.


• USPTO Class/Subclasses to look - 172/755; 239/662; 172/219  

See disclaimers on TG Ideas LLC publications and website - http://www.athenet.net/~ideas/, Thanks!