Bakhtyar abdulkadir Rashid and Akram Othman Esmail 2022. Influence of some Bio chars and organic fertilizers on some biological parameters of sweet corn (Zea mays L.) at Sulaimani Governorate, IKR. Zanco Journal of Pure and Applied Sciences. 34, 6 (Dec. 2022), 56–68. DOI:https://doi.org/10.21271/ZJPAS.34.6.7.