Got curious about acres planted east side vs west side and had a little time to kill. If you take a line down I35, from Kay County down to Love County and the counties east, 42 counties, there were roughly 700,000 acres in crops in 2017 (Kay and Noble have 270,000 of those 700,000 acres). West of that line, Grant, Garfield and Alfalfa alone have roughly 880,000 acres total, 635,000 just in wheat. If I get some more time I'll include the other western counties.
https://www.nass.usda.gov/Publicati..._Resources/County_Profiles/Oklahoma/index.php
https://www.nass.usda.gov/Publicati..._Resources/County_Profiles/Oklahoma/index.php