also, in Belgium they still have what they refer to as the 'iron harvest' when farmers expose unexploded WWI munitons each year. They still find over 150 tons each year.
Reference article:
https://theworld.org/stories/2023-08-04/iron-harvest-belgian-team-unearths-unexploded-ammunition-wwi
Reference article:
https://theworld.org/stories/2023-08-04/iron-harvest-belgian-team-unearths-unexploded-ammunition-wwi