Summary
Corn stover consists of the leaves, stalks, and cobs of maize (corn) (Zea mays ssp. mays L.) plants left in a field after harvest. Such stover makes up about half of the yield of a corn crop and is similar to straw from other cereal grasses; in Britain it is sometimes called corn straw. Corn stover is a very common agricultural product in areas of large amounts of corn production. As well as the non-grain part of harvested corn, the stover can also contain other weeds and grasses. Field corn and sweet corn, two different types of maize, have relatively similar corn stover. Corn stover (like various other kinds of stover) can be used as feed, whether grazed as forage, chopped as silage to be used later for fodder, or collected for direct (nonensilaged) fodder use. Maize forage is usually ensiled in cooler regions, but it can be harvested year-round in the tropics and fed as green forage to the animals. In the silage use case, it is usual for the entire plant (grain and stover together) to be chopped into pieces which are then crushed between rollers while harvesting. Maize silage is one of the most valuable forages for ruminants. In dairy farming, corn silage is primarily used as fodder for dairy cows during the winter season. Corn stover can be beneficial to beef cattle producers because the "corn stover can provide a low cost feed source for mid-gestation beef cows". In addition to the stalks, leaves, husks, and cobs remaining in the field, kernels of grain may also be left over from harvest. These left over kernels, along with the corn stover, serve as an additional feed source for grazing cattle. Over time, the stalks will decrease in value as feed, so farmers aim to graze the corn stover as soon as possible after harvest. The amount of grazing possible on a field of corn stover is "between one and two months of grazing per cow per acre (50 cows on for one to two months)." When corn stover is harvested intact (as opposed to the whole plant being chopped for silage, or the stover being left in the field by a combine), it can be cut and gathered by corn binders, which are reaper-binders designed specifically for maize.
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