Add wetting agent. Need five to ten acre-feet per year per acre. Watering by hand is the least economic approach. Water quality - chemical content of water. East Texas deep well water often carries a burden of salts.
Bicarbonates cause chlorosis, margin burning of leaves, and poor growth.
Acid injection is cure. Sulfuric acid, nitric acid, phosphoric acid generally used to correct the problem. Water quality and nutrition during rooting process affects success. Overton, Texas runs about 850. College Station is over 1000.