Estimating total nitrogen deposition in agroecosystems in northern China during the wheat cropping season
ChunE HE, XueJun LIU, Christie PETER, Fangmeier ANDREAS, FuSuo ZHANG
Journal of Arid Land . 2010, (1): 2 -8 .  DOI: 10.3724/SP.J.1227.2010.00002