Farm Efficiency--Big Versus Small

 This post says big farms are more efficient when capital is important; small farms when labor is more important.

It makes intuitive sense: if you're doing small plots with hand tools, the expertise and attention of the tool wielder is important.  If you're doing thousands of acress with equipment worth hundreds of thousands or millions of dollars, the ability of the tractor driver is less important than getting the most use out of the equipment.