Pigweeds are getting out of hand on a property that we are experimenting with trees on. (Arizona)

I believe they are Redroot Pigweeds. We can't spray due to the trees being young and instead have been mechanically taking care of them -- but it's like painting the Golden Gate Bridge !!

Just purchased a Weed-Wiper http://rotowiper.co.nz which we hope will help with controlling the weeds down the rows of trees. (We are receiving it this week so haven't used it yet, considering using Glyphosate)

50 Acres (Also plan on future inter-cropping down the rows....possibly things that could also play weed control parts) --- Basically a BIG garden !

Thought of clover as another option later.

Trying to put together a weed control gameplan...any thoughts ? Thanks