01015    a2200289   4500502002400000260001500024653001400039100002500053041000700078260003100085300001100116245011800127650003600245650001400281650001500295650001600310260002000326300002900346130000700375710002600382040001400408041000700422041000700429100008900436520018200525020001800707  aThèse de Doctorat  aWageningen1 aAgronomie  aKOEIJER, Tanja J. de  bEn  bUniversité de Wageningen  a143 p.  aEfficiency improvement for a sustainable agriculture : the integration of agronomic and farm economics approaches  aSYSTEME D'EXPLOITATION AGRICOLE  aAGRONOMIE  aEFFICACITE  aAGRICULTEUR  c16 JANUARY 2002  bIll., Couv. ill. ; 24 cm  lEn  aWageningen University  aSupport    bEn  bND  uAbomey-Calavi, Université d'Abomey-Calavi, Faculté des Sciences Agronomiques, Bj  aAgriculture is increasingly being confronted with public pressure to produce in a more sustainable way in order to decrease negative environmental effects as much as possible...  a90-5808-554-6