Tree Farming - easier said than done

Went over for a little weeding at the farm. With all this rain the trees are doing well, but the weeds are totally out of control!

There's regular grass, thistles, and Japanese stiltgrass all over the place. But then then mile-a-minute vines are covering about half of the entire area. The vines climb over everything, looking like a carpet with lumps and mounds as it blankets anything and everything. Easy to pull up, but very thorny.

Even though the stiltgrass is invasive, I would much prefer to have it the dominant weed.

I put down a second row of black weedscreen to see how well it works. I hope it doesn't make it too hot for the little Douglas firs.