00415naa a2200133 a 450000100080000000500110000800800410001910000160006024501020007626000090017870000190018770000200020677300550022618250191999-06-16       1994    bl uuuu     u00u1 u    #d1 aTOMM, G. O.  aBi-directional transfer of nitrogen between alfalfa and bromegrassbshort and long term evidence.  c19941 aKESSEL, C. van1 aSLINKARD, A. E.  tPlant and Soilgv. 164, n. 1, p. 77-86, July 1994.