corn (food / feed) basically differs according to the method of planting and harvesting. The so-called delicatessen maize, ie intended for human consumption, is planted at a lower rate, so that ripe ears have the largest possible grains. maize is ripened and only grain (flour, feed [whole or ground]) is consumed. silage maize, fodder maize is denserly planted, the harvest takes place during the largest period of carbohydrates and starches in the class, ie when the pike is still soft and digestible. even soft parts were often ensiled into the feed. sowing of whole and whole shrubs is used as feed. therefore, there is no difference in seed, but in the method of planting (thin / dense), harvesting (ripe / immature) and processing (grain / silage). (tuxedo) outside the bowl, something about which the question was not even asked (see answer and comments p): in terms of species, there are four: The main varieties of corn are: - common corn, ie hard corn (Zea mays conv. Vulgaris son Z. mays conv. Indurata), the so-called "horse tooth" (Zea mays conv. Identi syn. Z. mays conv. Dentiformis), - popcorn (Zea mays conv. Microsperma syn. Z. mays conv. Everta), - starch maize (Zea mays conv. amylacea) and - sweet maize (Zea mays conv. saccharata) popcorn has two forms: Zea mays conv. amylacea. Everta var. leucornis Zea mays conv. Everta var. oryzoides. all of them are and can be grown either for grain (eg popcorn, in our country it is not grown for high demands on moisture and heat) or for feeding in the form of silage, it depends on agrotechnical requirements and according to that it is also planted (for grain vs. for silage). all types of corn grown for grain are also suitable for human consumption (boiled, baked, grain, flour, ...) of course there are many types / methods of growing for grain (reventador (pop corn), duro (flint), blando (on flour) ), dentado (but most commonly grown for feed and industrial processing (starch, oils)), and sweet corn (delicacy, the most expensive type of maize)). I will not even analyze gm corn, because the issue is even more widespread. but none of this was mentioned, because the question was not about the species diversity of corn, but about the differences between the delicatessen / feed. and she answered it completely exhaustively. (tuxedo)