Which property does not directly affect water supply management?

Water supply management is influenced by various soil characteristics that govern water retention, drainage, and overall availability of water resources. Among the properties listed, soil temperature is the one that does not have a direct impact on water supply management.

Soil texture refers to the composition of different-sized particles in the soil, which significantly affects water retention and drainage capabilities. For example, sandy soils drain quickly while clayey soils retain more water. Organic content contributes to soil health and its ability to retain moisture, which aids in managing water supplies effectively. Geological features, including the type of bedrock and aquifers, determine groundwater availability and the rate of recharge, which are key factors in water supply management.

In contrast, soil temperature primarily influences biological activity, enzymatic functions, and germination rates, but does not directly govern how water is supplied or managed. While it may have indirect effects on plant growth and moisture demands, it doesn't directly pertain to the supply of water itself. Therefore, among the options provided, soil temperature is the property that lacks a direct relationship with water supply management.