The presidents of schools in the Big Ten and Pacific Ten have hammered another nail in the coffin of an organization seeking to represent the nation's top football powers now playing in the NCAA.

Robert MacVicar, president of Oregon State, announced yesterday that the presidents of schools in the two conferences agreed last Friday "to remain unaffiliated with the College Football Association."

MacVicar and Robert W. Fleming, president of Michigan, said the presidents' action was not intended to require the University of Arizona and Arizona State to withdraw from the CFA.

The CFA emerged as a threat to the NCAA two years ago after several disgruntled major schools called for the creation of an NCAA football "superconference" that was free from the influence of colleges with smaller football programs.

An NCAA football superpower division subsequently was formed, but the criteria for membership made some colleges with smaller programs eligible.

The presidents also came out against any attempt to merge the NCAA with the Association for Intercollegiate Athletics for Women.

The president said they agreed "there is a need for the NCAA, which represents the men, and the (ALAW) to work together to try to develop as many common rules, regulations and enforcement procedures as possible with the ultimate goal of some form of equitable union . . . (but) any attempt to form a single organization at this time is premature and that current efforts to force such a union should cease.

Vivian Scruggs, 17, of Greenbelt, finished the 440 intermediate hurdles in 59.7 seconds to set a national record late Sunday night at the AAU National Junior Olympics in Lincoln, Neb.

Scruggs, voted Outstanding High School Track Athletic for 1978 by The Washington Post, graduated from Eleanor Roosevelt High School. She will attend the University of Virginia this fall.