Agyei, B. , Bayor, H. (2017). 'Effect of Poultry Manure and Nitrogen, Phosphorus, and Potassium (15:15:15) Soil Amendment on Growth and Yield of Carrot (Daucus carota)'. World Academy of Science, Engineering and Technology, Open Science Index 122, International Journal of Agricultural and Biosystems Engineering, 11(2), 124 - 129.