Error

[BarrBarr]

2016-11-26 17:29:45: ACTION[Server]: BarrBarr uses farming:hoe_diamond, pointing at [node under=16002,5,16031 above=16002,6,16031]
2016-11-26 17:29:45: ERROR[Main]: ServerError: Lua: Runtime error from mod 'farming' in callback item_OnUse(): ...Minetest\bin..\games\minetest_game\mods\farming/api.lua:92: attempt to call field 'hoe_on_use' (a nil value)
2016-11-26 17:29:45: ERROR[Main]: stack traceback:
2016-11-26 17:29:45: ERROR[Main]: ...Minetest\bin..\games\minetest_game\mods\farming/api.lua:92: in function <...Minetest\bin..\games\minetest_game\mods\farming/api.lua:91>

[HybridDog]

This original farming plus mod has no activity for two years.
Have a look at the forks.