On 12/29/2020 09:58 AM, Dean Hoffman wrote:
Blame Nebraskans. A list of some things invented
in Nebraska:
https://journalstar.com/news/state-and-regional/nebraska/12-things-invented-in-nebraska/collection_9317c5df-fcee-5a73-9891-6e4c1d3cabf7.html#anchor_item_5

Some big city type must've written this. There is no mention of
center pivots.

https://www.tlirr.com/news/history-of-the-pivot/
https://livinghistoryfarm.org/farmin.../water_05.html
https://livinghistoryfarm.org/farmin.../water_09.html
https://www.invent.org/inductees/frank-zybach

Apparently Zybach grew up in Nebraska but headed west to Colorado before
his brainstorm. Daugherty bought the rights.