Maize refers to the tall one year grassy plants, her stem reaches a height of 3 meters (sometimes up to 6 meters and more), has developed root system. In the protein maize contains amino acids, which are essential for the human body. All allocated seven subspecies of maize, this classification is based on the properties of the grains. In Russia grow: sugar (vegetable), siliceous and tooth-shaped. Popcorn and soft corn is widespread in the USA, where the cultivation of this culture has industrial value. And pod and waxy maize are less common. Each subspecies is endowed with many varieties that vary by time of maturity, size and colour of grains, taste and shelf life. The corn is used in the kitchen for cooking different dishes, in agriculture as an animal food. In medicine allows maize posts.