In the United States, the two major types of wheat grown are spring wheat and winter wheat. Spring wheat is mainly grown in the northern Great Plains states such as North Dakota, South Dakota, Montana, and Minnesota. Winter wheat is grown from the southern Great Plains states (Nebraska, Kansas, and Oklahoma) through the Eastern United States (Missouri, Illinois, Indiana, Ohio, Michigan, Pennsylvania, Virginia, North Carolina, South Carolina and Georgia). California has also become a winter wheat producing state. She opposes it, saying that it led to reduced genetic diversity, increased vulnerability to pests, soil erosion, water shortages, reduced soil fertility, micronutrient deficiencies, soil contamination, reduced availability of nutritious food crops for the local population, the displacement of vast numbers of small farmers from their land, rural impoverishment and increased tensions and conflicts, and the beneficiaries have been corporations, not people.