Climate: what each crop needs
Climate stacking: a plot touching two zones adds them up. Scorching(+2) + Cool(−1) = Warm. Freezing(−2) + Warm(+1) = Cool. Cool + Cool = Freezing. Scorching + Freezing = neutral. Touching a zone by any amount counts. That gives you 3 temperatures from 2 devices.
Worker speed (job level vs. step level)
Processing (cooking, crafting, milling, drying…)
Mine, Well, Leisure, Aniipod Maker, Generator
+20% with a matching personality. Empty food bowl = ×0.2 for everyone.