SUMMARY – A research on durum wheat growth analysis was carried out at Sparacia farm (37°37’N-13°42’E) during
the 2000-2001 and 2001-2002 seasons in a typical semi-arid environment. The objective of this research was to
determine the effects of crop rotation (continuous wheat and wheat-pea rotation) and N fertilizer rates (0, 60 and 120
Kg ha-1) on growth of four durum wheat varieties, characterized by different productive ability and adaptation. A split-
split-plot design with three replications was used. The study highlighted the role of the CGR index in order to enable
a better knowledge of the relationship among crop techniques and wheat yield respons