Water Retention Curve

A Water Retention Curve (WRC) is a graph that shows how much water a soil can hold at different levels of moisture. As the soil becomes wetter, it retains more water, but as it dries out, it gradually holds less. The curve illustrates the relationship between soil moisture content and the soil's ability to retain water against gravitational forces. Understanding the WRC helps in agriculture, gardening, and water management by informing decisions on irrigation and predicting how soil will behave under different moisture conditions.