jakeb, good advice from these guys. I just installed a drip system to 480 new & one year-old pecans. Used the 5 gallon bucket "poor-mans" drip for the first year on 240 trees. It works ok, but the holes in the bucket clog up with debrie, so I had to get off the tractor at every tree to clean them out. arond spoke to using pond water to drip irrigate his nursery & how to use a very good filter. That's true because the algae will be a big issue clogging up the drip system. If you go that route, you will need an injection system so you run chlorine through the emmiters. I am using well water, so algae isn't really a problem. I used a large, self flushing mesh filter. I did install a Dosmatic injector so that I can routinely acidify the well water(pH 8.9)that's going to the irrigation system with sulfuric acid..