Activation Unproductive Coal Powder with Urea to Improve Chemical Properties of Ultisols

- Herviyanti, Teguh Budi Prasetyo, - Juniarti, Dewi Rezki


This study consisted of two stages of the experiment, in which the first phase was aimed to test the level of activity unproductive coal powder (sub-bituminous) activated with urea (CO(NH2)2). Experiment II was aimed to select the dose of Urea was right in fixing chemical properties sub-bituminous powder to be applied to mineral soil acidic (Ultisols).  Experiment I form into activation powder sub-bituminous (50 g) with urea at a dose of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 %. The second experiment was shaped non-factorial consisting of 15 treatments combined with two replications. Combination treatments consisted of sub-bituminous Powder doses: 0.5; 1; and 1.5% by the weight of the soil and the dose activator defined based on the results of phase I trials of 0; 2.5; 5; 7.5 and 10% by weight of powder sub-bituminous. The results showed the higher amounts of activator used, the higher pH and CEC sub-bituminous Powder and increasing from emerging functional groups. The use of sub-bituminous Powder was activated with urea can improve some soil chemical properties such as increasing the pH, available P, organic-C, CEC and reducing Al-exch of Ultisols.


activator; chemical properties; sub-bituminous; urea; Ultisols

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Published by INSIGHT - Indonesian Society for Knowledge and Human Development