Rebalance irontooth food - increased technology produces less food

The food production doesn't add up for irontooth at the moment. If you put cassava in the fermenter it takes 2 hours to produce 10, 5 food per beaver hour. Fermented soy beans take 3 hours plus 1.3 hours for the canola press to produce 20, which is (20/4.3) = 4.6 food per beaver hour. They give the same +2 benefit to the beavers. So it's less efficient even before you consider the costs of transport, building and unlocking a new technology, and needing gears for the oil press. In 1 hour in the hydroponic garden a beaver will grow (45/192) = 0.23 of a mushroom, and then in the same hour the fermenter will double it to 0.5 of a mushroom. So for two beaver hours of work you've produced half a mushroom. The corn rations are pretty good value at just under 10 per hour, but the eggplant and algae rations don't justify the increase from 5 to 6 because they use canola oil, which takes an hour to refine. So with the system as it stands you're much better off planting berries.