I recently ran across this depiction of the "Rice Belt" where almost all rice in the United States is grown, though apparently California is also a significant producer. I've always understood that at least up until the Civil War era, rice was a major crop in the Atlantic coastal regions of the Carolinas and Georgia. Did something happen to rice production there? Or has it simply been overshadowed by larger volumes elsewhere? I've also read that Africans' knowledge of rice growing contributed to the success of the crop in the south.