|Maize (/ˈmeɪz/ mayz; Zea mays subsp. mays, from Spanish: maíz after Taíno mahiz), commonly known as corn, is a large grain plant domesticated by indigenous peoples in Mexico in prehistoric times about 10,000 years ago.
Because it is cold-intolerant, in the temperate zones maize must be planted in the spring. Its root system is generally shallow, so the plant is dependent on soil moisture. As a C4 plant (a plant that uses C4 carbon fixation), maize is a considerably more water-efficient crop than C3 plants (plants that use C3 carbon fixation) like the small grains, alfalfa and soybeans. Maize is most sensitive to drought at the time of silk emergence, when the flowers are ready for pollination. (Source: Wikipedia)