Mehmet DÜZGÜN, Uğur BİLGE and M. Zahir DÜZ 2020. Evaluation by Multivariate Statistical Methods of Relationship with Physicochemical Properties of Humic Acid and Some Soil. ISPEC Journal of Agricultural Sciences. 4, 4 (Dec. 2020), 843–852. DOI:https://doi.org/10.46291/ISPECJASvol4iss4pp841-850.