B ud Walvoord is a third generation farmer in Waterloo, Neb., and has been farming with his father and brother since the 1970s. They currently grow 1,200 acres of corn and soybeans on the farm started by Walvoord’s grandparents in the 1950s. When Walvoord’s father first began irrigating in the 1970s, he purchased four 1976 Ford propane engines for the task. The engines performed well for many years, but in 2013, Walvoord decided to switch f

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