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Abstract
Research to evaluate the decomposition efficiency of biological products on acacia’s bark to select the best product to use as organic fertilizer. Emic and Sagi Bio products were added to the incubation block at a dose of 1 kg of product/1 ton of acacia’s bark. The experiment consisted of 3 treatments, each repeated 3 times and arranged in a completely randomized design (CRD). Indicators were monitored at days 10, 20, and 30 after incubation. The results show that adding biological products during the incubation of acacia’s bark has a positive effect on humidity and pH. On the 30th day after incubation, the acacia’s bark had a moisture content of 53.91 - 59.57% and a pH of 6.46 - 6.51. The weight of the acacia’s bark gradually decreases with incubation time. Adding Emic product when incubation has a lower weight than Saga Bio product, which is 2.5 kg. OC content and C/N ratio after incubation are 3.34 - 7.62% and 20.1 - 28.6 lower than before incubation. The content of total nitrogen, total phosphorus, and total potassium after incubation increased compared to before incubation by 0.51 - 0.85%, respectively; 0.006 - 0.008%; 0.091 - 0.128%. Emic product has a good effect on the decomposition process of Acacia bark under natural conditions, so it has potential to use acacia bark as fertilizer.