Roundup or equivalant

I fully appreciate everyone's concern about the environment BUT in this case the lot is almost two acres and has a nice stand of "horse weeds" 6 to 7 feet tall. Trying digging but they have a tap root that goes WAY DOWN---been there, done that. I need the Roundup for a one time application to get the tap roots; after that, controlling the weeds with cutting and digging won't be a problem.

Perhaps I will forever be baffled by folks who allegedly want to "live with nature" but who also just want to apply a little poison to it first.

I wouldn't worry about the hierba. The dry season will take care of it for you. Goats can handle the rest. You should be planting trees on that unfortunately clearcut lot!