The origin of the chemical elements in the Universe is one of the most fascinating and enduring mysteries in astronomy. Progress so far has come from studies of stars, but here only elemental ...
This is a preview. Log in through your library . Abstract Background: Anthropogenic nitrogen (N) addition has dramatically increased and significantly affected global nitrogen cycling. The natural ...
High δ¹⁵N of tree foliage in forests subject to high N supply has been attributed to ¹⁵N enrichment of plant available soil N pools after losses of N through processes involving N isotope ...
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