%A Christophe David %A Marie-H?l?ne Jeuffroy %A Muriel Valentin Morison %A C?line Herbain %T Improvement of the soil-crop model AZODYN under conventional, low-input and organic conditions %X The use of mechanistic crop modelling, simulating the dynamics of crop N requirements and nitrogen supply from the soil and fertilizers, can provide sound advice to users. This paper describes a methodological way to improve soil-crop modeling used for N management of conventional and organic wheat. %D 2007 %K nitrogen management, soil-crop model, wheat, organic, validation %L orgprints10310