Sazar S. Noraldeen, Sabiha S. Mustafa and Asmaa S. Ahmed 2023. Effect of NPK, Humic Acid, Biofertilizer and Light Intensity on Vegetative Growth and Bulb Production of Narcissus trilandrus L. and Hyacinthus orientalis L. Zanco Journal of Pure and Applied Sciences. 35, 1 (Feb. 2023), 143–150. DOI:https://doi.org/10.21271/ZJPAS.35.1.15.