Crop growth research. Agricultural engineers adjusting the height of solar radiation instruments so that they sit 1 metre above the top of corn plants on a farm. Solar radiation is being measured along with wind speed and other environmental factors as part of research into their effects on plant growth. Photographed in the USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ausmus, Stephen / US Department of Agriculture |
Bildgröße: | 2441 px × 3661 px |
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