h i g h l i g h t sNatural degradation of RDX is very slow and its release into the environment is a concern. Molasses enhances biodegradation of RDX and complete degradation occurred within few weeks. Low molasses dose of 1:40 (molasses to water ratio) was as effective as the higher dose (1:20). The combination of Guinea Grass (Panicum maximum) and molasses did not improve RDX degradation. Addition of molasses to soil in army training ranges can prevent migration of RDX to groundwater and off-site. a r t i c l e i n f o The energetics in the soil were royal demolition explosive (RDX) and high-melting explosive (HMX). Among the 6 treatments employed in this study, enhanced removal of RDX was observed from treatments that received molasses and went to completion. The RDX degradation rates in treatments with molasses diluted 1:20 and 1:40 were comparable suggesting that the lower dose worked as well as the higher dose. Treatments without molasses degraded RDX slowly and residuals remained after 15 weeks. The bacterial densities in molasses-treated units were much greater than those without molasses. Phytoremediation alone seems to have little effect on RDX disappearance. For HMX, neither bioremediation nor phytoremediation was found to be useful in reducing the concentration within the experimental period. The concentrations of nitrogen and phosphorous in the soil did not change significantly during the experiment, however, a slight increase in soil pH was observed in all treatments. The study showed that irrigating with diluted molasses is effective at enhancing RDX degradation mainly in the root zone and just below it. The long term sustainability of active training ranges can be enhanced by bioremediation using molasses treatments to prevent RDX deposited by on-going operations from migrating through the soil to groundwater and off-site.