Is tree mineral nutrition deteriorating in Europe

Mathieu Jonard (1), Alfred Furst (2), Arne Verstraeten (3), Anne Thimonier (4), Volkmar Timmermann (5), Nenad Potocic (6), Peter Waldner (4), Sue Benham (7), Karin Hansen (8), Paivi Merila (9), Quentin Ponette (1), Ana C de la Cruz (10), Peter Roskams (3), Manuel Nicolas (11), Luc Croise (11), Morten Ingerslev (12), Giorgio Matteucci (13), Bruno Decinti (14), Marco Bascietto (14) and Pasi Rautio (9).