Abstract: One of Indonesias soil ordo, ultisols, covers roughly 45.794.000 ha, or about 25% of the countrys total geographical area. Low pH and insufficient nutrition availability are Ultisols problems. Ultisols might have turned into cropland if the limitations were observed. This study examined how adding green manure to NPK compound fertilizer affected soil pH, exchangeable K, Cation Exchange Capacity (CEC), and paddy yield on Ultisols Jatinangor. At Ciparanje Experimental Farm, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, which is located at a height of around 700 meters above sea level, this research was carried out from October 2016 to January 2017.