Combined Effect of Prickly Pear Waste Biochar and Azolla on Soil Fertility, Growth, and Yield of Roselle (Hibiscus sabdariffa L.) Plants

Abstract Although the use of biochar to promote plant growth has been reported by many researchers, combined effect prickly pear waste (BC) and Azolla (AZ) in a field experiment on roselle plants did yet receive attention. Therefore, study aims evaluate extract growth, production, quality plants. The treatments were completely randomized block design with three replicates. Biochar was added at rates 0, 10, 20 ton ha ?1 AZ applied 3, 6% addition control treatment. high rate (20 ) significantly increased fresh dry weights sepals 27.98 35.73%, respectively, compared control. corresponding values 11.89 11.85% over when 6%. interaction both BC weight 47.16 60.59%, realized significant soil properties, yield, as well pigments This is good evident means that applications separately or are considered promising materials for sustainable organic agriculture safety food.