So, now that we got water, if we eat rice, then drink water, it could swell up in our bodies either stave off hunger longer or explode in our stomachs... Depending on how much we eat...
If you want to bypass the fact that rice is still gathered by hand IRL (no need for it really) you could just call the rice harvester "irrigated field" or something.
Eat the invisible food, Industrialist...it's delicious!