When you get your ZZZs, you cycle between REM and non-REM sleep. REM stands for rapid eye movement. During REM sleep, your eyes move quickly in different directions. That doesn't happen during non-REM sleep. First comes non-REM sleep, followed by a shorter period of REM sleep, and then the cycle starts over again.
Classes of Wheat. The many types of wheat grown throughout the world have common names such as durum, poulard, einkhorn or emmer. In the United States, there are generally six classes of wheat grown: hard red winter, hard red spring, durum, soft red winter, hard white and soft white.
Winter wheat acreage has always been much smaller than that of spring wheat in Minnesota. From 1999 to 2004, the winter wheat acreage in Minnesota varied from 15,000 to 60,000 acres. The primary constraint to winter wheat production in Minnesota is winter kill. Newer varieties and production practices have reduced this risk, making winter wheat a more viable option in the cropping systems of the state.