SCOTT SINKLIER / AGSTOCKUSA / SCIENCE PHOTO LIBRARY SCOTT SINKLIER / AGSTOCKUSA / SCIENCE PHOTO LIBRARY
Centre pivot irrigation. Aerial view of a field of alfalfa, or lucerne (Medicago sativa), watered by centre pivot irrigation. The metal frame running to bottom right holds sprinklers and can be rotated around the field to ensure even watering of the crops. Lack of water can lead to a much lower crop yield. Photographed in Kansas, USA.
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