W. S. Mohamed and  A. A. Hammam,  Poultry Manure and Its Derived Biochar as a Soil Amendment for Newly Reclaimed Sandy Soils under Arid and Semi-Arid Conditions.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
     2019, vol. 145(1). 22 - 29
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/10009975.