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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Bildgröße: | 5111 px × 3461 px |
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