The study looked at how sandy soil in a desert retains water. By using fractal geometry, researchers created a model to predict how water is held in the soil. They found that the size of soil particles and the water retention curve both follow fractal patterns. The soil's texture affects how water is retained, with finer soils holding more water. The model accurately predicted how water is held in the soil, showing that fractal geometry can help understand water retention in sandy soils.