The RIA Novosti news agency says 73-year-old Alexander Skopintsev made three tripwire-tethered explosives loaded with salt to ward off trespassers after several spud-snatchings in June 2009.
A neighbor suffered a lip injury after triggering one of the devices at the farm in the Primorye region.
The news agency says Skopintsev pleaded guilty to the illegal storage and production of explosives, but complained that the neighbor should not have stepped onto his land.