Cereal yield, measured as kilograms per hectare of harvested
land, includes wheat, rice, maize, barley, oats, rye, millet,
sorghum, buckwheat, and mixed grains. Production data on cereals
relate to crops harvested for dry grain only. Cereal crops
harvested for hay or harvested green for food, feed, or silage
and those used for grazing are excluded. The FAO allocates
production data to the calendar year in which the bulk of the
harvest took place. Most of a crop harvested near the end of a
year will be used in the following year. Food and Agriculture
Organization, electronic files and web site.