How does mulch benefit soil moisture retention?

Mulch plays a significant role in soil moisture retention primarily because it reduces evaporation and helps maintain cooler soil temperatures. By covering the soil, mulch acts as a barrier against direct sunlight and wind, both of which can accelerate moisture loss through evaporation. This covering keeps the underlying soil more humid, making it easier for plants to access the water they need for growth. Additionally, cooler soil temperatures can enhance root activity and overall plant health, further contributing to moisture retention as healthy plants better utilize available water.

While other factors such as drainage and nutrient addition might be beneficial in a gardening context, they do not directly address the issue of moisture retention in the same way that effective mulch application does.