STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
Agricultural soil samples analysis. Biological science technician (left) and soil scientist weighing soil samples. The samples will be analysed to determine how carbon content and other properties have changed over time due to soil management practices. The levels of elements such as carbon and nitrogen are a critical factor in assessing soils and the crops grown on them. This research is being carried out by the Agricultural Research Service (ARS) of the US Department of Agriculture. Photographed in the USA.
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