Sorghum in the context of "Combine harvester"

A cereal is a grass cultivated for its edible grain. Cereals are the world's largest crops, and are therefore staple foods. They include rice, wheat, rye, oats, barley, millet, and maize (corn). Edible grains from other plant families, such as amaranth, buckwheat and quinoa, are pseudocereals. Most cereals are annuals, producing one crop from each planting, though rice is sometimes grown as a perennial. Winter varieties are hardy enough to be planted in the autumn, becoming dormant in the winter, and harvested in spring or early summer; spring varieties are planted in spring and harvested in late summer. The term cereal is derived from the name of the Roman goddess of grain crops and fertility, Ceres.

Cereals were domesticated in the Neolithic around 8,000 years ago. Wheat and barley were domesticated in the Fertile Crescent. Rice and some millets were domesticated in East Asia, while sorghum and other millets were domesticated in West Africa. Maize was domesticated by Indigenous peoples of the Americas in southern Mexico about 9,000 years ago. In the 20th century, cereal productivity was greatly increased by the Green Revolution. This increase in production has accompanied a growing international trade, with some countries producing large portions of the cereal supply for other countries.

Millets (/ˈmɪlɪts/) are a highly varied group of small-seeded grasses, widely grown around the world as cereal crops or grains for fodder and human food. Most millets belong to the tribe Paniceae.

Millets are important crops in the semiarid tropics of Asia and Africa, especially in India, Mali, Nigeria, and Niger, with 97% of production in developing countries. The crop is favoured for its productivity and short growing season under hot dry conditions. The millets are sometimes understood to include the widely cultivated sorghum; apart from that, pearl millet is the most commonly cultivated of the millets. Finger millet, proso millet, barnyard millet, little millet, kodo millet, browntop millet and foxtail millet are other important crop species.Millets may have been consumed by humans for about 7,000 years and potentially had "a pivotal role in the rise of multi-crop agriculture and settled farming societies".

Sugarcane or sugar cane is a species of tall, perennial grass (in the genus Saccharum, tribe Andropogoneae) that is used for sugar production. The plants are 2–6 m (6–20 ft) tall with stout, jointed, fibrous stalks that are rich in sucrose, which accumulates in the stalk internodes. Sugarcanes belong to the grass family, Poaceae, an economically important flowering plant family that includes maize, wheat, rice, and sorghum, and many forage crops. It is native to New Guinea.

Sugarcane was an ancient crop of the Austronesian and Papuan people. The best evidence available today points to the New Guinea area as the site of the original domestication of Saccharum officinarum. It was introduced to Polynesia, Island Melanesia, and Madagascar in prehistoric times via Austronesian sailors. It was also introduced by Austronesian sailors to India and then to Southern China by 500 BC, via trade. The Persians and Greeks encountered the famous "reeds that produce honey without bees" in India between the sixth and fourth centuries BC. They adopted and then spread sugarcane agriculture. By the eighth century, sugar was considered a luxurious and expensive spice from India, and merchant trading spread its use across the Mediterranean and North Africa. In the 18th century, sugarcane plantations began in the Caribbean, South American, Indian Ocean, and Pacific island nations. The need for sugar crop laborers became a major driver of large migrations, some people voluntarily accepting indentured servitude and others forcibly imported as slaves.

Rice production is the fourth largest among cereals in the United States, after corn, wheat, and sorghum. Of the country's row crop farms, rice farms are the most capital-intensive and have the highest national land rental rate average. In the United States, all rice acreage requires irrigation. In 2000–09, approximately 3.1 million acres in the United States were under rice production; an increase was expected over the next decade, to approximately 3.3 million acres. USA Rice represents rice producers in the six largest rice-producing states of Arkansas, California, Louisiana, Mississippi, Missouri, and Texas.

Historically, rice production in the United States was connected to agriculture using enslaved labor in the American South, first planting African rice and other kinds of rice in the marsh areas of Georgia, South Carolina, and later in the Louisiana territory and Texas, frequently in southern plantations. For some regions, this became an important profitable cash crop during the 18th and 19th centuries. In the 20th century, rice production was introduced to California, Arkansas, and the Mississippi Delta in Louisiana. Contemporary rice production in the United States includes African, Asian, and native varieties from the Americas.

Khoisan (/ˈkɔɪsɑːn/ KOY-sahn) or Khoe-Sān (pronounced [kʰoɪˈsaːn]) is an umbrella term for the various indigenous peoples of Southern Africa who traditionally speak non-Bantu languages, combining the Khoekhoen and the Sān peoples. Khoisan populations traditionally speak click languages. They are considered to be the historical communities throughout Southern Africa, remaining predominant until Bantu and European colonisation. The Khoisan have lived in areas climatically unfavourable to Bantu (sorghum-based) agriculture, from the Cape region to Namibia and Botswana, where Khoekhoe populations of Nama and Damara people are prevalent groups. Considerable mingling with Bantu-speaking groups is evidenced by prevalence of click phonemes in many Southern African Bantu languages, especially Xhosa.

Many Khoesan peoples are the descendants of an early dispersal of anatomically modern humans to Southern Africa before 150,000 years ago. (However, see below for recent work supporting a multi-regional hypothesis that suggests the Khoisan may be a source population for anatomically modern humans.) Their languages show a limited typological similarity, largely confined to the prevalence of click consonants. They are not verifiably derived from a single common proto-language, but are split among at least three separate and unrelated language families (Khoe-Kwadi, Tuu and Kxʼa). It has been suggested that the Khoekhoe may represent Late Stone Age arrivals to Southern Africa, possibly displaced by Bantu expansion reaching the area roughly between 1,500 and 2,000 years ago.

Silage is fodder made from green foliage crops which have been preserved by fermentation to the point of souring. It is fed to cattle, sheep and other ruminants. The fermentation and storage process is called ensilage, ensiling, or silaging. The exact methods vary, depending on available technology, local tradition and prevailing climate.

Silage is usually made from grass crops including maize, sorghum or other cereals, using the entire green plant (not just the grain). Specific terms may be used for silage made from particular crops: oatlage for oats, haylage for alfalfa (haylage may also refer to high dry matter silage made from hay).