The Author might be mixing up his pantheons. Krono's counterpart in the Roman pantheon is Saturn, who not only governed the passage of time, but many things associated with it, like cycles of degeneration and renewal (such as seasons). Which means he also governed
agriculture.
Of course, there'd be good cause for the mix-up. After Rome conquered the Greeks, Saturn and Kronos got a bit mixed up in there. So given that we have Chronos as a God of Agriculture along with Vulcan? Pretty sure this was one of those little goofs where the author said one thing, but intended another.
@Nyanu, you might want to throw in a translation note to clarify this detail.