Employing stable isotopes to determine the residence times of soil water and the temporal origin of water taken up by Fagus sylvatica and Picea abies in a temperate forest
Nadine Brinkmann, Stefan Seeger, Markus Weiler, Nina Buchmann, Werner Eugster and Ansgar Kahmen
New Phytologist
https://nph.onlinelibrary.wiley.com/doi/abs/10.1111/nph.15255?campaign=woletoc
Amazing quality of this work.......