currently you can make small plots, big plots and patties. but honestly... nobody does that in reality.
if you've seen farm lands they all just plow a giant mass of ground all together and then the plants allocate a small/medium/big amount of space.
that would look a lot better since it'd fill all the space there is. then you can fill for example a complete plot of land (that's seperated by the elevation) and fill it with crops, it'll definitely look beautiful and you're closer to get a real full-fledged rice terrace (japanese "田")