Why does sand absorb water better than humus?

Sand absorbs water less effectively than humus due to its larger particle size and greater porosity, which allow water to drain quickly rather than being retained. In contrast, humus, composed of decomposed organic matter, has a fine texture and high water retention capacity, enabling it to hold moisture more effectively. Additionally, humus forms a gel-like substance when wet, which enhances its ability to absorb and retain water compared to the coarse structure of sand.