00345nam a2200121 a 450000500170000002000160001708200150003310000060004811000190005424500870007326000410016030000220020120251203110133.0  a81722331479  a660.6bDAD  d_  aDadarwal, K.R.  aBiotechnological approaches in soil microorganisms for sustainable crop production  aJodhpurbScientific publishersc1997  axvi,351p.c23 cm.