The United States produces wheat in almost all of the 48 contiguous states. Climate, regional differences, and wheat classes influence wheat production and practices in the United States (Vocke and Ali 2013). Two classes of U.S. wheat include Winter and spring wheat (Vocke and Ali 2013). Winter wheat varieties, which represent 70 to 80% of total U.S. wheat production, are sown in the fall to germinate and become established before entering a dormant phase during the winter (Vocke and Ali 2013). Winter wheat is grown primarily in the Great Plains, the eastern states, and the states along the Mississippi River (Vocke and Ali 2013). Spring wheat varieties are planted in the spring and harvested in late summer or fall (Vocke and Ali 2013). Spring wheat is grown in the Northern Plains, where harsh winters would kill winter wheat during dormancy (Vocke and Ali 2013).