Foliar δ15N values characterize soil N cycling and reflect nitrate or ammonium preference of plants along a temperate grassland gradient

Author: Kahmen Ansgar   Wanek Wolfgang   Buchmann Nina  

Publisher: Springer Publishing Company

ISSN: 0029-8549

Source: Oecologia, Vol.156, Iss.4, 2008-07, pp. : 861-870

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