Have about 40 acres I'm looking to get sprigged next year and I'm contemplating the best course of action for the prep. This pasture has been severely overgrazed and has a good stand of perennial weeds to go with the grasses. I'm planning on following the below link from A&M as a general guide. But I'm curious if should spray grazon/etc this spring for the perennial weeds or if spraying everything down with roundup in late summer would suffice? Just not wanting to pay for more chemical than necessary. Any other tips would be helpful.