00548nam a2200205Ia 4500003000400000005001700004008004100021040000800062041001200070082001000082082001100092100003500103100002100138245009000159250002500249260001500274260002700289260000900316650001700325OSt20220228172550.0150909s9999    xx            000 0 und d  cCOH  aEnglish  a631.4  bKAR/CO  aKarunakaran Nair G4Researcher  aAiyer R S4Guide  aContinuous use of muncipal sewage enfluents on soil physical and chemical properties.  aM.Sc                  aTrivandrum  bCollege of Agriculture  c1987  aSoil science