Enhancing the Availability of Potassium in New Egyptian Soils using Biochar Produced from Olive Stone Waste

Abstract The warming phenomenon is one of the most difficult challenges times. Agricultural waste decomposition contributes to global due increase in greenhouse gases. Carbon sequestering used reduce gases mitigate phenomenon. Applying biochar important tools for carbon soil hundreds thousands years. Paper aims produce olive stone (OSB) and apply it soils study its effect on properties status K (Quantity/Intensity K). Biochar was produced from at 650°C applied rates 0, 1, 2, 5% two investigated (sandy calcareous) effects growth wheat plants. Results analysis indicated that possesses several functional groups essential elements (N, P, K), a large surface area (394.25 m2 g-1), an average fine diameter (0.8 µm). application OSB improved properties, including water holding capacity, %porosity, bulk density, cation exchange availability some nutrients, especially potassium. Additionally, increased soluble-K ammonium acetate (NH4OAc-K) levels soils. potential buffering capacity (PBCK), activity ratio (ARK), labile (KL) were also enhanced. Moreover, plant’s height, root depth, dry matter, NPK content. Therefore, we concluded beneficial long-term improving fertility.