Attorney General Edwin Meese III is to be called as a prosecution witness at the conflict-of-interest trial this month of former White House aide Lyn Nofziger, it was disclosed in federal court yesterday.

Independent counsel James C. McKay said Meese will testify toward the end of the prosecution's case against Nofziger. He faces trial on four felony counts accusing him of illegal lobbying at the White House in 1982 on behalf of the now bankrupt Wedtech Corp. and two other clients.

Meese, whose conduct in the Wedtech scandal remains under investigation, was counselor to President Reagan at the time. Meese is expected to be asked about Nofziger's contacts with him, including a letter dated April 8, 1982, sent to him by Nofziger on Wedtech's behalf.

Then known as Welbilt Electronic Die Corp., the company was seeking a $32 million no-bid Army engine contract despite Pentagon opposition.

Jury selection is scheduled to begin Monday before U.S. District Court Judge Thomas A. Flannery. McKay said he intends to call 22 witnesses against Nofziger and Mark Bragg, Nofziger's partner in the Washington consulting firm they started when Nofziger left his job as White House political director Jan. 22, 1982.

Federal conflict-of-interest law prohibits former officials from lobbying at their former agencies within a year after leaving. Bragg is accused of aiding and abetting Nofziger in one of the four counts alleging violation of that rule.

Bragg's lawyer, Richard Ben-Veniste, told Flannery at a pretrial hearing yesterday that he wanted to show what attempts were made to influence Meese on Wedtech's behalf by other individuals.

Meese has said publicly that he ordered the White House review that led to Wedtech's obtaining the $32 million contract after he received several memos about the company's problems from San Francisco attorney E. Bob Wallach, a close friend of Meese whom Wedtech had enlisted in 1981.

Wallach and Meese's former investment partner, W. Franklyn Chinn of San Francisco, were indicted in New York on racketeering charges last month for allegedly taking under-the-table payments from Wedtech to influence Meese and other federal officials.

Ben-Veniste complained that large portions of Meese's testimony before a federal grand jury here had been deleted from the copies provided to the defense.

"We're entitled to know whether there was influence exerted on Mr. Meese {by others} to have Mr. Jenkins do something with regard to Welbilt," he protested. James Jenkins was Meese's top deputy.

"It's immaterial if other people were trying to influence Mr. Meese," Flannery said. "The question is not whether Mr. Meese was influenced but whether Mr. Nofziger and Mr. Bragg were attempting to influence Mr. Meese."

Meese's lawyer, Nathan Lewin, told a reporter after the hearing that "whatever testimony the court concludes is relevant, after hearing from both sides, Mr. Meese will give."

Meese has testified five times in the last year before McKay's grand jury. McKay said segments withheld from the defense dealt primarily with Meese's testimony about events in 1985 and 1986 relating to Wedtech and other matters and had "literally nothing to do with this case."