Centennial Farms & Ranches M&L Oltjenbruns Farms, Inc. Phillips County August and Emma Welper purchased the east section of the farm in 1917. Each succeeding generation expanded the farm to reach the current 3,510 acres. They farm white winter wheat and corn. An aerial shot of M and L Oltjenbruns Farms. Photo courtesy of M&L Oltjenbruns Farms. Year Awarded 2017 Year Founded 1917