Hey fellow TX I know the TAMU irrigation school was doing a study but I can't seem to locate it. Try contacting or hunting through this link.
My 2 cents? If you can put it down on level stable uniformly packed soil prior to adding soil and sod it can work assuming you space properly etc. Stagger the drippers in a triangular pattern. If you trench it in the water is going to flow along the ditch line and not uniformly. The netafim site has great info as well. Multicycling is very important as well to get the water to spread laterally and not just go down. This is not purely a design thing as some would want to believe. It takes 1/3 experience 1/3 common sense and 1/3 design inmo.