I’ve never been to space, but it has been said that from outer space there are three man-made technologies visible: the Great Wall of China and electric illumination of the world’s largest cities are the first two. The third are the green crop circles created by center pivot irrigation.

It has been said that the center pivot irrigation system is “perhaps the most significant mechanical innovation in agriculture since the replacement of draft animals by the tractor”. Today, over 50% of the irrigated field acres in North America are using the center pivot concept. And other modern agricultural countries are catching up, such as Brazil, Argentina, Australia, New Zealand and South Africa.

It’s no coincidence that this agricultural technology was invented by someone who farmed on top of the largest aquifer in the western hemisphere: the Ogallala Aquifer which is sometimes called the High Plains Aquifer.

Geologists estimate the aquifer was formed about 5 million years ago by ancient erosion from the Rocky Mountains carried eastward by rivers, along with the additional accumulation of countless rains and snows. It now stretches beneath 174,000 square miles, underlying parts of eight states: South Dakota, Texas, Kansas, Nebraska, Colorado, Wyoming, Oklahoma and New Mexico, which makes up most of what we call the great plains.

This area has been the setting for numerous big ag stories over the years, from the great cattle drives of the 1800s that we covered in our Cattle Kingdom episode, to the land grab of the Homestead Act to the dirty thirties of the dust bowl. But there is no doubt that the center pivot was a major game changer, and it allowed the tough settlers of this rough country to turn this desert land into one of the most productive agricultural regions in the world.

I’ve had the chance to live in two different agricultural areas made possible by the Ogallala aquifer: in the panhandle of Texas where I lived and worked in Amarillo and Dumas, Texas. Then years later I lived in Northwest Kansas where I commuted up to my job in Benkelman, Nebraska. So I’ve been able to see firsthand what this incredible resource can do for farming and for rural economics when combined with the revolutionary ag technology we’ll discuss today: the center-pivot invented by Frank Zybach.

Frank definitely fits my criteria for these history episodes as an ag innovator that I wish I could interview if they were still alive. It highlights the impact innovation can have on the ag economy and carries valuable lessons for all of us aspiring ag innovators out there. But it also is a case study about agricultural sustainability. The aquifer is a limited resource, built from snowmelt coming off the rocky mountains over thousands of years. In the 72 years since Frank Zybach patented his invention, water levels in many parts of the Ogallala Aquifer have dropped drastically, many times larger than what could possibly be replenished.

Resources:

“How Center Pivot Irrigation Brought the Dust Bowl Back to Life” - Smithsonian Magazine

“The Boys from Valley - Frank Zybach” - McCook Gazette

“A History of Irrigation Technology Used to Exploit the Ogallala Aquifer” by Stephen White and David Kromm

Frank Zybach: A man who revolutionized agriculture - INEDA