Specifically how does the macro check system work?

[Glarundis]

just go to the fields, you'll get enough food for weeks in a few minutes.
and if telb/nox is harassing you, go to occlo and do all the farms at once to have enough food for months (in order not to have to use boat (and spend money) all the time)

[Ugjer]

Or sing a song of fertility.