Maize, wheat and rice, between them, accounted for 87 percent of all grain production, worldwide, and 43 percent of all food calories in 2003 (FAO 2008).
Storage facilities should be protected from small grain pests, rodents and birds.
The caryopsis is popularly called a grain and is the fruit typical of the family Poaceae (or Gramineae), such as wheat, rice, and corn.
Milled grains do keep better because the outer layers of the grains are rich in rancidity-prone fats.
Whole grains (see below) are good sources of dietary fiber, unsaturated and essential fatty acids, several vitamins and dietary minerals, and other important phytonutrients.
The farmer may sell the grain at the time of delivery or maintain ownership of a share of grain in the pool for later sale.
Grains are traditionally called corn in the United Kingdom and Ireland, but that word has became specified for maize in the United States, Canada, New Zealand, and Australia.
Health-conscious people tend to prefer whole grains, which are not milled.
Rice is eaten as cooked entire grains, although rice flour is also produced.