CURT MAAS / AGSTOCKUSA / SCIENCE PHOTO LIBRARY CURT MAAS / AGSTOCKUSA / SCIENCE PHOTO LIBRARY
Maize harvest. Combine harvester (left) cutting and threshing (beating) a crop of maize plants (Zea mays). This separates out the grain, which is unloaded onto a truck (right). The grain may be ground into flour, or used for its oil, or used as food for animals. Photographed in Iowa, USA.
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