In this study, the allelochemical-induced effects of leaf water extract hemp (Cannabis sativa) on seed germination and seedling growth were investigated in durum wheat (Triticum durum) cv. Mongibello barley (Hordeum vulgare) Alamo. The seeds imbibed 25%, 50%, 75%, or 100% solution concentrations, obtained from a 2% extract, they germinated at 20 10 °C. stock (i.e., concentration) was by extract...