The purpose of this study was to explore the effect of volcanic ash from the eruption of Mount Kelud and compost on the soil properties and production of sweet potato on a sandy soil. The treatments of this study were (a) a combination of and volcanic ash with the proportion of 100: 0. 90:10. 80:20. https://www.roneverhart.com/Procharger-Supercharger-Kit-Dodge-Ram-5-7L-Hemi-1500-2009-2010/