From 1915 thru 1968 University of Nebraska School of Agriculture (UNSA), formerly Nebraska School of Agriculture (NSA), was a high school. In 1963 the Legislature passed legislation beginning the transition from a high school to a post-secondary institution. Pages from both are now available here.
 

While there were some rough years in the 1980's, the Nebraska College of Agriculture (NCTA) has grown throughout the years since. An interesting pdf version of a comprehensive history is available.