Grain yield and grain protein of old and modern durum wheat cultivars grown under different cropping systems

A five-year field trial was performed in a typical Mediterranean environment to compare grain yield (GY) and GY stability, grain protein percentage (GP) and GP stability resulting from different cropping systems: two based on 14 old durum wheat landraces/cultivars grown in low-fertility soils; and one based on 14 modern cultivars grown in high-fertility soils. Cropping systems were also differentiated in terms of sowing date, sowing rate (250...