My garden is heavy mulched but its been awfully dry and I am beginning to think about irrigation. I like the idea of subsoil but have a few concerns. If I put it deep enough so a broadwork doesnt puncture it is it do deep for the plants to benefit? To water the whole area what would the spacing be? I definetly want to add a "y" to pipe in my compost tea. Just brainstorming. I suppose the ideal is a hybrid between garden irrigation and soilbased aquaponics if that makes any sense. What say you great thinkers?
How established are your plants? What kind of plants are you growing? Is your soil sandy, loamy, or clay?
Off the cuff I'd say that if you really feel the need to irrigate, just get yourself some soaker hose and bury it under the mulch, yet still on the surface of the soil. Much less disturbance and you don't have to worry about your water line being too deep in the soil.
Travis, For simplicity I like your idea of soaker hose and will be giving it a try. Its a vegetable garden with soil that is slowly transitioning from "clay rock" to soil, (thanks to my rabbits for their help) Been checking out the "fertigation" sites to get some ideas about mixing in my compost tea.