I looked for inspiration to base setups and I stumpled upon one of the screenshots.
How does it even work? I can't see any wells or food boxes. I'd understand them maybe being a tad to the left of what we can see. However, there's no chance any of the workers who takes care of the right side can reach. There's a wall in between so they are not getting it from somewhere further to the right.
I have a question. Does the workers need a regular chest too? That is at least pictured in the screenshot. They ignore fields when there are multiple seeds on the lot from a harvest. Do they deposit them there if there's a chest ready?