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.
You may want to check this out
https://abundantpermaculture.com/permaculture-chickens
Good questions