Soil Moisture Release Curve Construction

Why do I need a moisture characteristic curve?

A moisture release curve relates the water potential of a particular soil to its water content, and is important for describing water storage in soil and water availability to plants.  Because of range limitations of water potential instrumentation, no single instrument can produce a complete moisture release curve containing field capacity (the wet range) to past permanent wilting point (the dry range). 

What instruments are used to create the moisture characteristic curve?

Decagon's Soil Moisture Release Curve service uses UMS tensiometers and the Hyprop to produce the points for the moisture characteristic curve in the wet range and the WP4 to produce the points for the moisture characteristic curve in the dry range.

Can I create my own moisture characteristic curve?

Of course!  In fact, Decagon has step-by-step instructions to walk you through creating a moisture characteristic curve for your soils.  However, if you don't have the time or the instruments, Decagon's service provides a reliable way to get the data that you need.

What does the moisture characteristic curve package include?

When you order the moisture characteristic curve service, you'll receive the packaging to send Decagon about four liters of the soil that you would like characterized.  In about two weeks (more for international or non-typical soils), you will receive a moisture characteristic curve containing the ranges that you specify.  If you do not specify a range, we will assume that you would like a range between 0 to -2 MPa.

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