Answer...
Hydrophobic soil is a result of organic compounds forming a wax like coating over the soil particles. It is a common condition in Australia, where water does not infiltrate the soil after rainfall or irrigation. This condition occurs naturally in sandy soils with low organic matter, but can also be found in clay soils where these organic compounds cling to the finer clay particles. Hydrophobic conditions are also common in soils which are regularly tilled and as gardens and lawns become more established. Similarly garden pots, planters and hanging baskets are affected. When soil becomes water repellent it can cause issues such as run - off, erosion, loss of nutrients and reduced plant growth.
In turf, it is common to notice dry or dead patches particularly in warmer conditions. Other notable symptoms are water pooling on the surface during watering or, when watering gardens on hills or slopes, water running off the surface.
Using a wetting agent such as Baileys Grosorb will overcome these conditions. Grosorb is designed to assist water absorption, retention and movement through the soil.