Akay, A. “Zinc Fertilizer Request of Black Cumin (Nigella Sativa L.) Grown in Soil Mixed With Different Proportions of Vermicompost”. Turkish Journal of Agriculture - Food Science and Technology, vol. 7, no. sp2, Dec. 2019, pp. 17-22, doi:10.24925/turjaf.v7isp2.17-22.3091.