Effect of Adding Mineral Fertilizer NPK and Biochar on the Potential Buffering Capacity of Potassium and its Relation to Corn Yield in Calcareous Soil in Northern Iraq Raniah Nayyef Ali; ammar Younis Ahmed kashmolah Volume 13, Issue 2, December 2023, Page 110-119 10.33794/qjas.2023.144205.1144 Show Article PDF 748.44 K