Missing Crops?

I've lost a row of tomatoes. I clearly remember planting them but when seedlings came up and I went out to mark the rows with what's in them, I'm short one row of tomatoes, either the travelers or the market champions. It's not that there aren't any seedlings in one row. It's actually short one row of dirt when compared to my chart, so something growing is not what I think it is. Lesson learned: mark the rows as you plant, not later.