A thick layer of organic mulch works as a water conservation tool in a few different ways. The organic layer acts like an insulating blanket moderating soil temperatures and reducing evaporation from the soil surface. Naked soil exposed to the sun will heat up tremendously, whereas the soil under the mulch will remain much cooler, preserving the water that is in the soil so that it is available to your plants. On the other side of the equation a layer of mulch can…