Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2021.1103.1109Resman GintingSahta TufailaMuhammad Suramas RembonFransiscus Halim 1020212410Background and Objective: Plant litter or plants that grow naturally and the plant materials of the cultivated plants are quite abundant both in fresh and dry form. In the case of a plant, litter is not processed and left on the surface of the soil as organic material then the process of decomposition and reshuffle requires a long time. The research aimed to find out the effectiveness of bio-activators on the formation and quality of compost fertilizer. Materials and Methods: The study design was used in a factorial pattern with two factors. The First factor is bio-activator consists of four levels, namely: EM-4, PROMI, Orgadec and (EM-4+PROMI+Orgadec). The second factor is organic matter consists of seven levels, namely: Imperata cylindrica, paddy straw, Gliricidia sepium leaves, (Imperata cylindrica + paddy straw), (Imperata cylindrica + Gliricidia sepium leaves), (paddy straw + Gliricidia sepium leaves), (Imperata cylindrica + paddy straw + Gliricidia sepium leaves). There were 28 treatments, each treatment was repeated three times to obtain 84 treatment units. Results: The result showed that compost fertilizer with Orgadec bio-activator treatment and PROMI is the best quality (pH compost, water content, P-total, N-total, C-organic, C/N ratio). Conclusion: The compost fertilizer with Orgadec bio-activator is the best quality for this research (pH compost, moisture content, P-total, N-total, C-organic, C/N ratio).]]>Barrena, R., X. Font, X. Gabarrell and A. Sánchez,20143411091116Peña, H., H. Mendoza, F. Diánez and M. Santos,20202020Kumari, P., S. Chaudhary, R. Dhanker, N. Verma and S. Goyal,20187222227Viaene, J., J. Van Lancker, B. Vandecasteele, K. Willekens and J. Bijttebier et al.,201648181192Rodrigues, L.C., I. Puig-Ventosa, M. López, F.X. Martínez, A.G. Ruiz and T.G. Bertrán,20202020Storino, F., J.S. Arizmendiarrieta, I. Irigoyen, J. Muro and P.M. Aparicio-Tejo,2016565362Vázquez, M.A. and M. Soto,2017643950Rivero, C., T. Chirenje, L.Q. Ma and G. Martinez,2004123355361Neher, D.A., L. Fang and T.R. Weicht,2017Rhizoctonia solani.]]>25251261Adugna, G.,2016493104Waqas, M., A.S. Nizami, A.S. Aburiazaiza, M.A. Barakat, M.I. Rashid and I.M.I. Ismail,2018176426438Khater, E.S.G.,2015515Rebollido, R., J. Martinez,Y. Aguilera, R. Stegmann, K. Melchor and I. Koerner,200866167Makan, A., O. Assobhei and M. Mountadar,20132013Ahn, H.K., T.L. Richard and H.L. Choi,200742215223Richard, T.L., A.H.M. Veeken, V. deWilde and H.V.M. Hamelers,20042013721381Toková, L., D. Igaz and E. Aydin,2019226164