Interesting...
I have seen a number of WW1 reworked bayonets fitted with a cartridge case hilt. After the return of the soldiers, food was a priority and 'every day' tools were more scarce (a lot of steel/iron was taken and used to manufacture guns, tanks etc).
Many started to 'grow their own' food ...a number of these bayonets were mounted onto short shafts (hence the percussion cap removal from the shell so that it could accomodate a 'stick') and used as gardening implements etc.
That could be the case here
.....reminds me of that expression about swords and ploughs ..and 'necessity is the mother of invention'
A great 'snap shot' of history.
Regards David