In the past I have worked with farmers that used a certain surfactant that they called soap. Supposidly it would open up the ground and let the water in. Or it would release the water retention and the water was able to purculate into the soil.
I ask about this because one of my dad's neighbors was looking for some to put on his yard because the was would just run off and the grass was burning up. The only problem is that you would have to apply it with the water in order to do this.
Does anyone have an answer?