00545naa a2200181 a 450000100080000000500110000800800410001910000200006024501280008026000090020865000160021765000090023370000160024270000190025870000180027770000200029577300480031516037621995-06-27       1982    bl ---       0--  u    #d1 aRUFTY JR, T. W.  aRelative content of NO3- and reduced N in xylem exudate as an indicator of root reduction of concurrently absorbed 15NO3-1.  c1982  aNitrogênio  aSoja1 aVOLK, R. J.1 aMCCLURE, P. R.1 aISRAEL, D. W.1 aRAPER JR, C. D.  tPlant Physiol.gv.69, n.1, p.166-170, 1982.