It's called the Root Zone Watering System. Here's a link
http://www.hunterindustries.com/product/micro-irrigation/root-zone-watering-system
Just trying to think my way out of my problem, so see if this makes sense. Since I have 1" line around the periphery of the property with valves (do they still call them manifolds?) back at the house, can I tap into the 1" line way away from the house and put in a remote controlled valve that would control either one more line with PGP's and sprayers or an entire Micro sprayer system? The thing I'm trying to avoid is digging all the way from the house/valves, to the back of the property (around 120') just to add to a valve cluster that is close to the house.
Maybe the question is, is there any limit to the number of zones that I add to my 1" line as long as only on zone runs at a time? Then, with these micro sprayers, how do I slice them into the 1" line. Is it 1" line into the valve and 1/2" line out of the valve? Is there any kind of pressure reducer needed?