00279pab a2200109 454500008004000000100001600040245005500056260000900111300001300120650001600133773002000149180718b1999   xxu||||| |||| 00| 0 eng d  aSingh, S.P.  aIrrigation and input use efficiency in agriculture  c1999  ap.247-58  aAgriculture  aBusiness Review