Hartono, A., D. Nadalia, and B. H. Trisasongko. “Soil Potassium Adsorption at Several Shallot Center Areas, Brebes Regency, Central Java Province”. Journal of Degraded and Mining Lands Management, vol. 10, no. 4, July 2023, pp. 4737-4, doi:10.15243/jdmlm.2023.104.4737.