ADAMS CHALLENGES DECONTROL TARGETS
Transportation Sec Brock Adams says he doubts if decontrol of domestic oil prices will stimulate increase in oil production, May 19 news conference; does not disagree with decision to decontrol, which he says will lead to conservation; backs windfall profits tax, saying that some of revenues from it might be used to further basic research programs on new automotive technology; White House has estimated that decontrol will save up to 200,000 bbls of oil a day next year and up to 1.1 million in '85, with 75% of saving coming from new production and 25% from conservation; illus (M)