Table  Soil moisture content and parameters for moisture release
curve.

Texture		Density  FC	PWP      Psi_e (Ye)        b         available water	K_sat								
Name	       (g/cm^3)	(%)g/g	(%)g/g	 (J/Kg)	                        inch/ft		Kg*s/m^3)
SILTY CLAY	1.279	31.2	15.0	-6.529420	13.001208	2.487979	3.05099E-05
CLAY		1.262	35.1	17.2	-7.179678	14.203435	2.712011	3.37861E-05		
SILTY CLAY LOAM	1.239	32.1	15.1	-6.056972	10.357549	2.528244	5.16789E-05
SILT		1.156	33.2	14.9	-5.108334	6.715722	2.539809	0.000105747	
CLAY LOAM	1.354	26.4	12.5	-2.194719	8.943137	2.255454	0.000124967
SILTY LOAM	1.278	27.6	12.5	-2.865955	6.857649	2.313298	0.000137421
SANDY CLAY	1.444	23.1	11.3	-1.153969	10.208511	2.057767	0.000175748
LOAM		1.395	22.3	10.2	-1.355894	6.263467	2.023179	0.000292379
SANDY CLAY LOAM	1.471	20.0	 9.5	-0.897029	7.421883	1.855017	0.000356399
SANDY LOAM	1.533	13.9	 6.2	-0.702919	4.288265	1.416109	0.000762841
LOAMY SAND	1.584	11.6	 5.1	-0.509928	2.856075	1.237858	0.001759966
SAND		1.627	 9.1	 3.9	-0.443715	2.013529	1.017803	0.002702816


Brooks and Correy (Used in in Campbell Soil Physics with basic) = Ym= Ye(O/Os)^-b
where Ym = the soil water potential j/kg
      Ye = air entry potential j/kg
      O  = moisture content
      Os =saturated moisture content
      b= power constant
conversion numbers 
     1 bar = 100 J/kg
     1 bar = 100,000 Pa = 0.1 MPa
     1 bar = 1020 cm
     1 J/kg = 1000 Pa = 1 kPa

multiply  (  Kg*s/m^3)*1388.9=in/hr
The above information  on fc and pwp was derived from  Israelsen 1932
The information on Campbell's model was derived from soil texture content
and a method described by Campbell 1985. 

	K= Ksat (O/Os)^(2b+3)

To convert the soil moisture release parameters from Campbell's model to
Van Genuchten's model 
click here

Reference
Israelsen, Orson Winso, 1887-1968.Irrigation principles and practices,
	 by Orson W. Israelsen. PUBLISHER: New York, John Wiley & Sons [1932]  

Campbell, Gaylon S. Soil physics with BASIC : transport models for soil-plant
	 systems / Gaylon S. Campbell. PUBLISHER: Amsterdam ; New York : Elsevier, 1985.