摘要：This paper will discuss on the irrigation system that will be applied for Dioscorea hispida Dennst. species. The methodology part will be explained with the image of automatic timer and pump, that will be used according to the proper manner. The automatic timer will be attached to the power supply, while the pump will be controlled by timer according to the time which had been setup as, 1) once every day (T1); 2) once every three days (T2); 3) once every four days (T3); 4) once every five days (T4). The control treatment for the frequency of water supply is 5) once every two days (C). The data for the volume of water to be applied in this experiment were referred to the local climatological information and calculated by the formula which will be discussed further in the materials and methods section.
