There are two main differences between our IaaS and O&M Service Plans: Irrigation system ownership: with IaaS the irrigation system watering your crops is fully owned, operated and maintained by Netafim. With the O&M model Netafim operates the irrigation system but you own it. Contract lifespan: IaaS involves a longer term contract of c.5-10 years, while O&M has a minimum contract of 3-5 years.