Quarterback McCathorn Clayton ran for two touchdowns and passed for one, and tailback Doug DuBose rushed for 139 yards as No. 9 Nebraska beat fifth-ranked Oklahoma State, 34-24, in Big Eight college football last night in Stillwater, Okla.

Clayton completed eight of 16 passes for 161 yards as the Cornhuskers improved to 4-1, 1-0 in the league. Oklahoma State dropped to 4-1 and 0-1.

The victory was the Cornhuskers' 24th straight over Oklahoma State.

Clayton scored on runs of one and seven yards, and had a 38-yard touchdown pass to Robb Schnitzler.

The Cornhuskers took a 20-3 third-quarter lead and held on as Oklahoma State scored 14 third-quarter points to make it 20-17.

Early in the fourth quarter, Nebraska linebacker Marc Munford intercepted Ronnie Williams' pass at the Oklahoma State seven-yard line. Three plays later, fullback Tom Rathman scored from the four and the Cornhuskers led, 27-17.

Clayton scored from seven yards out to end a four-play, 55-yard drive with 6:50 to play in the game.

Oklahoma State's Williams completed 27 of 44 passes for a school-record 363 yards. Tailback Thurman Thomas, the nation's second-leading rusher, was held to 71 yards on 22 carries.

Ronnie Harmon rushed 20 times for 175 yards and a touchdown and Robb Houghtlin kicked three field goals to lead the top-ranked Hawkeyes over the Badgers in a Big Ten conference game in Madison, Wis.

Iowa is 5-0, 2-0 in the conference. The Badgers are 3-2, 0-2 in the Big Ten.

The Badgers trailed by 10-0 at the half, when Wisconsin Coach Dave McClain replaced starting quarterback Mike Howard with Bud Keyes.

Aided by some errors by the Hawkeyes, Wisconsin twice cut its deficit to three points in the third quarter. The Badgers got to 10-7 on a three-yard pass from Keyes to fullback Joe Armentrout. Iowa made it 13-7 on a 40-yard field goal by Houghtlin. Todd Gregoire kicked a 27-yard field goal with one second left in the third quarter. But a 12-yard touchdown run by Harmon and a 35-yard field goal by Houghtlin in the fourth quarter put the Hawkeyes out of reach.

Iowa's Chuck Long was 18 for 28 passing for 167 yards, with one interception and one touchdown.