Soil texture triangle: Hydraulic Properties Calculator

Soil Texture Triangle

Hydraulic Properties Calculator

Enter values for percent sand and percent clay and click on [Calculate]
to obtain the soil properties for the respective sand and clay.

Permanent Wilting Point: is the water content at a matric potential of -1,500 kPa (-15 bars). It roughly corresponds to the lower limit of the Available Water.
This value is expressed in (units³ water/units³ soil).
Field Capacity: is the water content at the upper limit of the Available Water or drained upper limit. It roughly corresponds to a matric potential of -30 kPa (-0.3 bars) in most soils and to -10 kPa (-0.1 bars) in sandy soils.
This value is expressed in (units³ water / units³ soil).
Available Water (AW): AW = (FC - PWP) This value is expressed in (units³ water / units³ soil), or rather, percent water.

Dr. K. E. Saxton
USDA/ARS
Pullman, WA 99164-6120
Phone: (509)335-2724
FAX: (509)335-7786
E-mail: ksaxton@wsu.edu
Homepage: http://www.bsyse.wsu.edu/faculty/saxton.html

K.E. Saxton et al., 1986
Estimating generalized soil-water characteristics from texture.
Soil Sci. Soc. Amer. J.
50(4):1031-1036

Thanks Dr. Nelson - Great Utility !

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% Sand % Clay	Percent Sand
	Percent Clay

	Wilting point (cm³ water/cm³ soil)
	Field capacity (cm³ water/cm³ soil)
	Saturation (cm³ water/cm³ soil)
	Sat. hydraulic conduct. (cm/hr)
	Available water (cm³ water/cm³ soil) (in water/foot soil)