[Handbook in plant cultivation 1998. The Agricultural Research and Extension Groups at the Soer-Oestland]

abonos analyse de sol calidad conduite de la culture crop management crop yield crops cultivation cultivo cultivos engrais escarda fertilisation fertilizer application fertilizers fitopatologia irrigation labranza leys malezas manejo del cultivo mauvaise herbe noruega norway plant pathology plant production plante de culture pradera temporal prairie temporaire pratique culturale quality rendement des cultures rendimiento de cultivos riego soil testing tillage travail du sol weed control weeds