The Département du Déminage in France is still very busy. Six hundred engineers have died in the line of duty, and farmers are killed every year.
With the annual ploughing up of old war junk goes the epithet "the iron harvest": Special army patrols still drive around the countryside picking up old grenades which the farmers put in piles beside the road. Even 80 years after the war, every year there are still accidental deaths caused by live ammunition exploding. Farm workers are at greatest risks, because their machines do not discriminate between buried grenades and sugar beets, potatoes or other root-crops, and, of course, because they work on the former battlefield each day. For example, in 1991 a total of 36 farm workers had died when their machines hit duds (today 39).Old grenades, which penetrated deeply when they hit the ground without exploding, slowly make their way towards the surface, like those oft cursed stones in Irish and Swedish fields, which when the frost thaws, reach the surface making life miserable for the poor farmer. This happens not only to stones and duds, but to things like stone age axes and other archaeological artifacts. The stone, thus, rises a little bit each year, due to the frost heave. The same thing happens accordingly with duds, small or large.
The Swedish historian Dr Peter Englund writes in the magazine Vi, no 17/18 (1997), pp. 20-36., that (translated from Swedish) "in Belgium 126 have people died and over 400 been wounded in explosions during the last 50 years" (p. 27.).
Beat me to it. GMTA :)
For example, in 1991 a total of 36 farm workers had died when their machines hit duds.