Q.planting near berm
How far from the base of my a newly planted berm should I plant? I have a sago palm murphey, agave murphei, and barrel cactus. I am preparing/finishing my underground sprinkler/bubbler system for these plants I plan to plant next early summer. I need to know how far from the base these bubblers should be and how deep the berm should be. I believe a berm is like a ditch?

Here are some links for you that will help you determine the layout for the watering system.
https://www.gardeningknowhow.com/special/xeriscape/irrigation-systems-for-xeriscape-environments.htm
http://ag.arizona.edu/pubs/water/az1298/
https://ag.arizona.edu/pubs/garden/mg/irrigation/Scheduling.html