Barley, depending upon the variety, may have either two or six
rows of grain in the ear. Ears with two rows form a flat ear; those
with six rows form a roughly cylindrical ear. The yield from 6-row
varieties is greater than for 2-row, so these varieties are normally
used for animal feed. In Britain, only 2-row barley with a low protein
content is used for malting.
Barley flour, with a low gluten content, produces a 'heavy' loaf
unless mixed with wheat flour when making bread. Other uses include
pearled barley, groats, barley water and malt extract health food.