What would you recommend to spray a 1-2 acre area? I'm going to totally kill what I have and plant a pasture type of field primarily to train dogs. The area will be bush-hogged tonight, and I will want to apply a total-kill (e.g. glyphosate, etc) before planting the new seed.Can a 1-2 acre area be sprayed with a backpack sprayer (if so, what model do you recommend)? I'm not opposed to paying for someone to spray it (perhaps with an ATV sprayer), but where would you find someone interested in spraying such a small plot?Any input would be greatly appreciated.Mark