Another feature of the potager garden is the Intesive method of planting. Instead of wasting space with rows (that must be weeded and maintained) the intensive method plants grids of plants close together so the roots and leaves choke out weeds and are easier to maintain.
The "Square Foot" gardening method does this, only they will sell you fancy grids to lay out your beds. I run around for weeks with a tape measure or a 4 foot stick measuring and planting seeds. As the plants begin to grow and finally become visible, I can measure my measuring success.
I leave walkways the width of my rottotiller, but I've learned that sometimes you have to leave some extra space, because some crops tend to lay over in the walkway making it impossible to till.