Hi,

Without wanting to show off my feathers, I can suggest that you have a look at the following article, in which several estimation methods for water-retention parameters are compared. None has really the overall solution, but some proved better than others.

Gijsman A.J., Jagtap S.S., Jones J.W. 2002. Wading through a swamp of complete confusion: how to choose a method for estimating soil water retention parameters for crop models. European Journal of Agronomy, 18: 75-105.
 
Please be aware that the article is pretty long and has a lot of not-so-interesting statistics, but if you write critical about other people's work then you have to support it with facts.
 
 
Arjan Gijsman


-----Original Message-----
From: DSSAT - Crop Models and Applications
[ mailto:[log in to unmask]]On Behalf Of Prakash Dixit
Sent: Friday, October 21, 2005 11:51 PM
To: [log in to unmask]
Subject: PWP and clay content


Hi Everyone,

Just want to know, is there any standard relationship between permanent wilting point and the clay content??

What's the best way to calculate permanent wilting point (or lower limit) from clay content.

Thanks

Prakash Dixit

University of Melbourne


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