Olson Irrigation Systems Index Irrigation, emitters, irrigation valves, irrigation solenoids, micro-spray components, sprinklers, risers, irrigation tubing, landscape, agriculture, landscape contractors, landscape construction, landscape maintenance, watering, landscape installation, irrigation installation, drip irrigation Olson Irrigation Systems designs and manufactures irrigation, drip irrigation, and micro spray emitters, valves and assemblies for the landscape and agriculture industries and distributes its products throughout the United States and the world.