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Published November 24, 2010, 12:00 AM

Robert Daugherty


This photo from Jan. 22, 2002, shows Robert Daugherty in his Valmont Industries office in Omaha, Neb. Daugherty, the Nebraska pioneer of center pivot irrigation, died at home Wednesday Nov. 24, 2010, at the age of 88. In 1953 Daugherty obtained a patent license to the center pivot irrigation system developed by Frank Zybach. The system proved a catalyst for Valmon's growth and made a worldwide mark in agriculture. (AP Photo/Nati Harnik)
Read the article: Valmont says founder Robert Daugherty has died