Heartland - (ca)

In academic research, the phrase is frequently used with (circa) to denote the geographic center of a culture during a specific era:

: Travelers often explore this region for its farm-to-table food stands, oak-shaded country roads, and low-key wine trails that offer a more "authentic" California experience than the coastal metros. Archaeological "Heartland (ca.)" Heartland (CA)

Stretching over 400 miles through the center of the state, the Central Valley is one of the most productive agricultural regions in the world. In academic research, the phrase is frequently used

: The region produces a massive portion of the nation's fruits, nuts, and vegetables, earning it the title of California's Heartland . In academic research

Agriculture, viticulture, and veterinary sciences (notably at UC Davis)