Level 10 farmers can determine which type of crop is growing in a field, except at the lowest growth level ("freshly sown").
Level 15 farmers can mouse over a field and determine crop type, and whether or not the field is tended or untended (ie I.E needs farming)up to one tile away.
Level 20 farmers can determine the growth level of a field. The levels are, chronologically sorted:
# The field is almost at full height.
# '''The field is at full height and ready to harvest!'''
# '''The field is at full height and ready to harvest!''' (Used to be: The field is overaged, and some crop has been ruined.)
# (rotten old weeds, crops completely ruined)