This plan is insane.
To protect tree growth, kill everything else!
Except this kills the soil, soil needs plants or it dries out and erodes. Soil also needs a microbiome of fungi and microbes to keep it healthy.
And it kills the pollinators, which trees need to reproduce. And it kills things like the squirrels that scatter seeds across the land, so the trees won’t be able to reproduce.
And it encourages a monoculture. One wave of disease or insect will kill the entire region’s biosphere.
So to protect the trees, kill everything else, make it so they can’t reproduce, and make the soil inhospitable. What fucking moron approved this.