(Bureau of Land Management filed motion to deem admitted 97 requests for admission; requests for admission were generated from various components of previous litigation concerning Bureau’s use of chemical that damages crops and verdict finding Bureau 40% at fault and chemical company 60% at fault; plaintiffs objected to the request for admission on several grounds; court denied motion to deem admitted the 97 requests, but granted the motion as to requiring plaintiffs to supplement their responses within 30 days).