BILL BARKSDALE / AGSTOCKUSA / SCIENCE PHOTO LIBRARY BILL BARKSDALE / AGSTOCKUSA / SCIENCE PHOTO LIBRARY
Nutsedge (Cyperus esculentus, seen at centre with tall protruding leaves) growing between a crop of rice (Oryza sativa) planted in a row. This invasive and persistent weed can starve crops of essential nutrients. Methods of controlling its growth include chemicals and rotation farming. Photographed in Arkansas, USA.
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