Which agricultural product led to the establishment of the San Joaquin Valley as a major farming region?

The establishment of the San Joaquin Valley as a major farming region was significantly influenced by the cultivation of cotton, along with the later introduction of fruits and vegetables. In the late 19th and early 20th centuries, cotton emerged as a key crop due to the region's favorable climate and rich soil, which allowed for high yields. This initial agricultural success laid the foundation for further diversification.

As the agricultural methods evolved, farmers began to explore other crops that could thrive in the valley’s climate, which included a variety of fruits and vegetables. This transition not only increased the agricultural output of the region but also spurred economic growth, transformed the local economy, and positioned the San Joaquin Valley as a vital part of California's agricultural industry.

While wheat, rice, and grapes have their own significance in California’s agricultural history, they did not play the pivotal role that cotton and the subsequent focus on fruits and vegetables had in making the San Joaquin Valley a major farming hub. The combination of these crops created a diverse agricultural landscape that continues to define the region today.