Belgium is being the top country by barley in the world. As of 2014, barley in Belgium was 92,097 hg/ha. The top 5 countries also includes Ireland, Saudi Arabia, the United Arab Emirates, and Switzerland.
Hordeum spp.: two-row barley (H. disticum) six-row barley (H. hexasticum) four-row barley (H. vulgare). Tolerates poorer soils and lower temperatures better than does wheat. Varieties include with husk and without (naked). Used as a livestock feed, for malt and for preparing foods. The roasted grains are a coffee substitute.