Around 150 of the canisters were discovered in woods near Woodhall Spa in October 2017. Now popular with scout troops and walkers, it was once a wartime RAF base used by 617 Squadron, better known as the Dambusters. The base was closed in the 1960s.
Martyn and Michaela Tasker of Lincoln and local man Stuart Holmes appeared before Lincoln magistrates last week. They were bailed until 12 September, when the case against them will be heard at Lincoln crown court.