Soil sample. Researcher preparing a soil sample for analysis of carbon and nitrogen content. By studying the levels of these two minerals in the soil,

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Soil sample. Researcher preparing a soil sample for analysis of carbon and nitrogen content. By studying the levels of these two minerals in the soil, scientists are able to determine how fertile it is and what plant life it can support. Photographed at the Centre of Alpine Ecology, Trento, Italy.

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Photo credit: © MAURO FERMARIELLO/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: alpine, atmosphere, carbon, centre, climate, dioxide, earth, ecology, experiment, flow, geology, hand, hands, italian, italy, lab, laboratory, research, sample, sand, science, soil, study, trento, type