Been playing PTW 1.21 for months now, including mods such as DyP, TAM etc. Last week I got tired of getting pushed around on Emporer and started paying attention to all the advice about micromanaging production. Immediately noticed wierd things regarding production & improvements: 1) Irrigation of grassland (normal and bonus) does not increase food from 2, 2) Mining a hill increases shields from 1 to 2 not 3, 3) flood plains produce 2 food and irrigation increases this to 3. ......irrigation of plains seems ok; 1 food increases to 2 and all other mining actions produce the expected results. Have I corrupted something in the course of playing various mods? Do I need to reinstall everything, or is all of this correct & I just can't read the civilopedia?