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OpenStudy (anonymous):

Which of the following factors helped allow for irrigated farming in the arid southwest of the United States?

OpenStudy (anonymous):

The main factor that led to irrigated farming in the southwest was the invention of the center-pivot irrigation system. The system was invented in 1948 by Frank Zybach, a farmer from Strasburg, Colorado. Much of the water used for irrigation in the Southwest US is from the Colorado River and groundwater

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