I have a farm with a loss in 2018. Should be choosing to depreciate, rather than expense, items in the $100-2500 range?

2018 is my first full year with a farm.  It has a loss.  I'm assuming for durable items (assets) >$2,500 I'll depreciate them and for durable items <$100 (e.g. tools) I'll expense them.  It is for things in between that it seems I need to make a decision.  Should I expense or depreciate?  Any guidance on how to make that decision would be appreciate.   I expect overall I'll have a NOL in 2018