Many soils, especially Iraqi soils, contain pH The high level contains many nutrients, but it is not ready for absorption by the plant, and thus symptoms of deficiency appear on the plants gown in those soils, but when adding biofertilizers that contain beneficial microorganisms, it works to reduce pH These soils and thus increase the readiness of the nutrients present in them, which reflects positively on the characteristics of the root, vegetative and fruitful growth  of the cultivated plants, and from this standpoint it is possible to reduce the use of excessive chemical fertilizers and compensate for them with biological fertilizers and preserve human health and the environment around us.