Zakiyah, Zahrah Nur, Cicik Rahmawati, and Is Fatimah. 2019. “Analysis Of Phosphorus And Potassium Levels In Organic Fertilizer In The Integrated Laboratory Of Jombang District Agriculture Office”. INDONESIAN JOURNAL OF CHEMICAL RESEARCH 3 (2):38-48. https://doi.org/10.20885/ijcr.vol3.iss2.art1.