I've planted crops one in-game day apart. The crops that popped up ready for harvest Aug 15 were only giving me a yield of 2-3.
There is ZERO chance I missed 4 entire day/rain cycles so that the yield is "bad." For one thing, ANY of the other crops I've planted would have been at at least half growth, and they're not- they're still at "just planted" stage.
If this is a bug, please let us know, and fix...5 out of the last 6 harvests I'd had have been this bad, and I'm watching the crops like a hawk, getting up in the middle of the night to check them even. It can't be necessary to do this.