Most of my business is just cutting grass and fert apps. However, I would like to know more about irrigation systems. I have about 15 yards that are irrigated and I think I could make some more money by servicing the irrigation system in these 15 lawns. I would like to know where I can learn how to do this. Is it something that can only be taught by watching someone else or is there some sort of class I can take. Any info would be nice. Thanks.