Benjamin Osae Agyei and  Hypolite Bayor,  Effect of Poultry Manure and Nitrogen, Phosphorus, and Potassium (15:15:15) Soil Amendment on Growth and Yield of Carrot (Daucus carota).   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 124 - 129
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/10006282.