ABSTRACT The productivity of upland rice on sub-optimal land such as podzolic is low and can be increased through the application of rice husk zeolite and K fertilizer. This study aims to study the combination of rice husk zeolite and K fertilizer and the effect of each of them to the growth and yield of upland rice (Oryza sativa L.) on podzolic media (Ultisol). This research was conducted exp…