A cereal is any grass
cultivated (grown) for the edible components of its grain
(botanically, a type of fruit
called a caryopsis
), composed of the endosperm
, and bran
. The term may also refer to the resulting grain itself (specifically "cereal grain"). Cereal grain crops
are grown in greater quantities and provide more food energy worldwide than any other type of crop and are therefore staple crops
. Edible grains from other plant families, such as buckwheat
, are referred to as pseudocereal
In their natural, unprocessed, ''whole grain
'' form, cereals are a rich source of vitamin
s, oils, and protein
. When processed by the removal of the bran, and germ, the remaining endosperm is mostly carbohydrate. In some developing countries
, grain in the form of rice
, or maize
constitutes a majority of daily sustenance. In developed countries
, cereal consumption is moderate and varied but still substantial.
The word “cereal” is derived from ''Ceres
'', the Roman goddess of harvest and agriculture.
allowed for the support of an increased population, leading to larger societies and eventually the development of cities. It also created the need for greater organization of political power (and the creation of social stratification
), as decisions had to be made regarding labor and harvest
allocation and access rights to water and land. Agriculture bred immobility, as populations settled down for long periods of time, which led to the accumulation of material goods.
villages show evidence of the development of processing grain. The Levant
is the ancient home of the ancestors of wheat, barley
s, in which many of these villages were based. There is evidence of the cultivation of cereals in Syria
approximately 9,000 years ago. Wheat, Barley, Rye
were all domesticated in the Fertile Crescent
during the early Neolithic. During the same period, farmers in China
began to farm rice and millet, using human-made floods and fires as part of their cultivation regimen.
Fiber crops were domesticated as early as food crops, with China domesticating hemp
being developed independently in Africa and South America, and Western Asia
domesticating flax. The use of soil amendment
s, including manure
, fish, compost
, appears to have begun early, and developed independently in several areas of the world, including Mesopotamia
, the Nile Valley
and Eastern Asia.
The first cereal grains were domesticated
by early primitive humans. About 8,000 years ago, they were domesticated by ancient farming communities in the Fertile Crescent region. Emmer wheat
, einkorn wheat
, and barley were three of the so-called Neolithic founder crops
in the development of agriculture. Around the same time, millets and kinds of rice were starting to become domesticated in East Asia. Sorghum
and millets were also being domesticated in sub-Saharan West Africa.
Cereals and civilization
Cereals were the foundation of human civilization
. Cereal frontiers coincided with civilizational frontiers. The term Fertile Crescent
explicitly implies the spatial dependence of civilization on cereals. The Great Wall of China
and the Roman limes
demarcated the same northern limit of the cereal cultivation. The Silk Road
stretched along the cereal belt of Eurasia
. Numerous Chinese imperial edicts stated: “Agriculture is the foundation of this empire,” while the foundation of agriculture were the Five Grains
Cereals determined how large and for how long an army could be mobilized. For this reason, Shang Yang
called agriculture and war “the One.” Guan Zhong
(the author of ''Arthashastra
'') and Hannibal
expressed similar concepts. At the dawn of history, the Sumerians believed that if agriculture of a state declines, Inanna
, the goddess of war, leaves this state. Several gods of antiquity combined the functions of what Shang Yang called “the One” – agriculture and war: the Hittite Sun goddess of Arinna
, the Canaanite Lahmu
and the Roman Janus
. These were highly important gods in their time leaving their legacy until today. We still begin the year with the month of Janus (January). The Jews believe that Messiah's family will originate in the town of Lahmu (Bethlehem
); in Hebrew, ''beit lehem'' literally means "house of bread". Christians believe that Jesus Christ
, who is said to have been born in Bethlehem, is the messiah. Lahmu is the reason why, in Hebrew, ''bread'' (''lehem'') and ''warfare'' (''milhama'') are of the same root. In fact, most persistent and flourishing empires throughout history in both hemispheres were centered in regions fertile for cereals.
Historian Max Ostrovsky argues that this historic pattern never changed, not even in the Industrial Age
. He stresses that all modern great powers have traditionally remained first and foremost great ''cereal'' powers. The “finest hour” of the Axis powers “ended precisely the moment they threw themselves against the two largest cereal lebensraums” (the United States and the USSR). The outcome of the Cold War
followed the Soviet grave and long-lasting cereal crisis, exacerbated by the cereal embargo imposed on the USSR in 1980. And, called “the grain basket of the world,” the most productive “cereal lebensraum” dominates the world ever since.
Having analyzed the mechanism at work behind this pattern, Ostrovsky outlined that the cereal power determines the percentage of manpower available to non-agricultural sectors including the heavy industry vital for military power. He emphasized that chronologically the Industrial Revolution
follows the modern Agricultural Revolution and spatially the world's industrial regions are bound to cereal regions. Taken from space, map of the global illumination is said to indicate by its brightest parts the industrial regions. These regions coincide with cereal regions. Ostrovsky formulized a universal indicator of national power valid for all periods: total cereal tonnage produced by one percent of nation's manpower. For the present, this indicator demonstrates a unipolar international hierarchy
The Green Revolution
During the second half of the 20th century there was a significant increase in the production of high-yield cereal crops worldwide, especially wheat and rice, due to an initiative known as the Green Revolution
The strategies developed by the Green Revolution focused on fending off starvation and increasing yield-per-plant, and were very successful in raising overall yields of cereal grains, but did not give sufficient relevance to nutritional quality.
These modern high yield-cereal crops tend have low quality proteins
, with essential amino acid
deficiencies, are high in carbohydrate
s, and lack balanced essential fatty acid
s and other quality factors.
So-called ancient grains and heirloom varieties have seen an increase in popularity with the "organic" movements of the early 21st century, but there is a tradeoff in yield-per-plant, putting pressure on resource-poor areas as food crops are replaced with cash crops.
While each individual species has its own peculiarities, the cultivation of all cereal crops is similar. Most are annual plant
s; consequently one planting yields one harvest. Wheat, rye, triticale
, oats, barley, and spelt
are the "cool-season" cereals. These are hardy plants that grow well in moderate weather and cease to grow in hot weather (approximately , but this varies by species and variety). The "warm-season" cereals are tender and prefer hot weather. Barley and rye are the hardiest cereals, able to overwinter in the subarctic
. Many cool-season cereals are grown in the tropics. However, some are only grown in cooler highlands, where it ' "may" ' be possible to grow multiple crops per year.
For the past few decades, there has also been increasing interest in perennial
grain plants. This interest developed due to advantages in erosion
control, reduced need for fertiliser, and potential lowered costs to the farmer. Though research is still in early stages, The Land Institute
in Salina, Kansas
has been able to create a few cultivars that produce a fairly good crop yield.
The warm-season cereals are grown in tropical lowlands year-round and in temperate climates during the frost-free season. Rice is commonly grown in flooded fields, though some strains are grown on dry land. Other warm climate cereals, such as sorghum
, are adapted to arid conditions.
Cool-season cereals are well-adapted to temperate climates. Most varieties of a particular species are either winter or spring types. Winter varieties are sown in the autumn, germinate and grow vegetatively, then become dormant
during winter. They resume growing in the springtime and mature in late spring or early summer. This cultivation system makes optimal use of water and frees the land for another crop early in the growing season.
Winter varieties do not flower until springtime because they require vernalization
: exposure to low temperatures for a genetically determined length of time. Where winters are too warm for vernalization or exceed the hardiness of the crop (which varies by species and variety), farmers grow spring varieties. Spring cereals are planted in early springtime and mature later that same summer, without vernalization. Spring cereals typically require more irrigation and yield less than winter cereals.
Once the cereal plants have grown their seeds, they have completed their life cycle
. The plants die, become brown, and dry. As soon as the parent plants and their seed kernels are reasonably dry, harvest can begin.
In developed countries, cereal crops are universally machine-harvested, typically using a combine harvester
, which cuts, threshes
, and winnows
the grain during a single pass across the field. In developing countries, a variety of harvesting methods are in use, depending on the cost of labor, from combines to hand tools such as the scythe
or grain cradle
If a crop is harvested during humid
weather, the grain may not dry adequately in the field to prevent spoilage during its storage. In this case, the grain is sent to a dehydrating facility, where artificial heat dries it.
In North America, farmers commonly deliver their newly harvested grain to a grain elevator
, a large storage facility that consolidates the crops of many farmers. 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. Storage facilities should be protected from small grain pests, rodents
The following table shows the annual production of cereals in 1961, 1980, 2000, 2010, 2018 and 2019/2020.
Maize, wheat, and rice together accounted for 89% of all cereal production worldwide in 2012, and 43% of all food calories in 2009,
while the production of oats and rye have drastically fallen from their 1960s levels.
Other cereals not included in FAO
, an ancient grain that is a staple in Ethiopia
and grown in sub-Saharan Africa as a grass primarily for feeding horses. It is high in fiber and protein. Its flour is often used to make injera
. It can also be eaten as a warm breakfast cereal similar to farina
with a chocolate or nutty flavor. Its flour and whole grain products can usually be found in natural foods stores.
* Wild rice
, grown in small amounts in North America.
Several other species of wheat have also been domesticated, some very early in the history of agriculture:
, a close relative of common wheat.
, a wheat species with a single grain.
, one of the first crops domesticated in the Fertile Crescent.
, the only tetraploid
species of wheat currently cultivated, used to make semolina
, an ancient relative of durum with an unknown history.
In 2013 global cereal production was a then record 2,521 million tonnes. The FAO 2019/2020 global cereal production estimate released in December 2020 is 2,706 million tonnes and the forecast for the 2020/2021 season was 2.741 million tonnes.
The FAO reports the major wheat exporters are Argentina
, the EU
, the Russian Federation, Ukraine
and the United States
. The major coarse grain exporters are Argentina
, the EU, the Russian Federation, Ukraine
and the United States
. The major rice exporters are India
, the United States
, and Viet Nam
Some grains are deficient in the essential amino acid
. That is why many vegetarian cultures, in order to get a balanced diet, combine their diet of grains with legume
s. Many legumes, however, are deficient in the essential amino acid methionine
, which grains contain. Thus, a combination
of legumes with grains forms a well-balanced diet for vegetarians. Common examples of such combinations are dal
(lentils) with rice
by South India
ns and Bengalis
, dal with wheat in Pakistan
and North India
with corn tortillas
with rice, and peanut butter
with wheat bread (as sandwiches) in several other cultures, including the Americas.
The amount of crude protein
measured in grains is expressed as grain crude protein concentration.
Cereals contain exogenous opioid food peptides
s such as gluten exorphin
. They mimic the actions of endorphine
s because they bind to the same opioid receptor
s in the brain.
has published a series of standards regarding cereal products which are covered by ICS 67.060.
* Breakfast cereal
, grain ventilating process
* Food price crisis
* Food quality
* Food safety
* Lists of foods
* Post-harvest losses
* Push–pull technology
* Zadoks scale