Nur Kholifah, A. ., N. . Pawestri, and M. Utami. “Determination of Available Phosphorus in Soil Samples Using Olsen & Bray I Method”. INDONESIAN JOURNAL OF CHEMICAL RESEARCH, vol. 10, no. 2, Dec. 2025, doi:10.20885/ijcr.vol10.iss2.art3.