<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Finzi, A.C.</style></author><author><style face="normal" font="default" size="100%">Norby, R.J.</style></author><author><style face="normal" font="default" size="100%">Calfapietra, C.</style></author><author><style face="normal" font="default" size="100%">Gallet-Budynek, A.</style></author><author><style face="normal" font="default" size="100%">Gielen, B.</style></author><author><style face="normal" font="default" size="100%">Holmes, W.E.</style></author><author><style face="normal" font="default" size="100%">Hoosbeek, M.R.</style></author><author><style face="normal" font="default" size="100%">Iversen, C.M.</style></author><author><style face="normal" font="default" size="100%">Jackson, R.B.</style></author><author><style face="normal" font="default" size="100%">Kubiske, M.E.</style></author><author><style face="normal" font="default" size="100%">Ledford, J.</style></author><author><style face="normal" font="default" size="100%">Liberloo, M.</style></author><author><style face="normal" font="default" size="100%">Oren, R.</style></author><author><style face="normal" font="default" size="100%">Polle, A.</style></author><author><style face="normal" font="default" size="100%">Pritchard, S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Increases in nitrogen uptake rather than nitrogen-use efficiency support higher rates of temperate forest productivity under elevated CO2</style></title><secondary-title><style face="normal" font="default" size="100%">Proc. Nat. Acad. Sci.</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.pnas.org/cgi/content/abstract/0706518104v1</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">104</style></volume><pages><style face="normal" font="default" size="100%">14014-14019</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record></records></xml>