Good day Hans,
We mostly used our chicken tractors to fertilize the fields, till and do the weed eating for us.
It really depends on the how many chickens are in a tractor and what your terrain is like. When we had the 10 birds in the garden rotated with electric fence, i moved the fence weekly in the winter and about 3 days in the summer. The fence was 100ft long. It was so nice to not have to weed eat.
Yes I am an abundance + member And Justin Rhodes channel has lots of good examples of using chickens for cultivating.
for example this same chicken tractor was also used on top of a raised bed that it fit so that it was weeded and fertilized then moved to the next bed.