PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Agricultural research. Agricultural engineers collecting bermuda grass (Cynodon dactylon) hay to carry out analyses into forage quality and nutrient levels. They compared yields of hay grown with treated wastewater, to yields of hay grown with commercial fertilizers. Photographed in Florence, South Carolina, USA.
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