Yes, those are sugar beets in the wagon shown above. Note the dog riding atop the beets.
Joe Santiago (the guy who owns the historic Charles Warner house, and who now has the Manning House hovering over his garage,) writes to tell us that signed copies of his book, Ebb & Flow: 100 Years of Huntington Beach, are available "at California Greetings on Main and Orange Streets downtown for only $12, or unsigned at DeGuelle Glass on Adams and Alabama for only $10."