An irrigation system is disclosed that includes a variable nozzle control assembly disposed or coupled to the outer-most end of the structure of a self-propelled mechanized irrigation system. The variable nozzle control assembly may be configured to control the output water/applicant as a function of the mechanized irrigation system's location in the field. As the mechanized irrigation system travels an irrigation path, the variable nozzle control assembly may dynamically change the angle, trajectory, pressure, gallons per minute (GPM) flow (flow capacity) of the water and/or applicant released from the outer most end of the mechanized irrigation structure to provide sufficient irrigational coverage to the land.