Along with this horrific economic state, the American Midwest also experienced the Dust Bowl, which made land impossible to farm, and caused dust storms that made the area uninhabitable.
The East of Eden display acquaints you with the world of the lettuce workers. These tall grasses have a deeper root structure, and that root structure helps to fix the soil in-place, allowing it to take on the loam y texture that made the region attractive to agriculture.
A family moving down the highway during the Great Depression You might find a nature visit there to be a pleasant complement to the Steinbeck immersion. William M. The migrants and the powers which force them to make their journey--nature and society--are frequently represented by animals.
Then farmers plowed up the soil to plant winter wheat. They landed in California. How we all felt about Okies, that word had a horrible connotation.
Thematically, their behavior supports Ma Joad's worry that they are losing their ties to each other and that they are in danger of breaking down as individuals.