Dear Benjamin,
A few years ago, I did a detailed comparison of various pedotransfer functions, which was first presented as a poster on the modeling conference in Florence, Italy, in July 2001 and then published as 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.
It is quite a surprising title, but it really reflects how the situation was, as it was a mess. Many published papers had plain errors or were published various times, but with different equations. The equation DSSAT used until v3.5 also proved inaccurate; which one is used now by v4.0, the programmer of Ag&Bio Eng. at Univ. Florida (Oxana) can tell you.
If you would like to receive it as PDF, please let me know, but note that it is almost 1 MB, which e.g. Hotmail may not accept, so please make sure your mail box has no such limit.
Arjan Gijsman
University of Florida / Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia.
-----Original Message-----
From: DSSAT - Crop Models and Applications [mailto:[log in to unmask]]On Behalf Of Benjamin Fehling
Sent: Thursday, June 29, 2006 10:07 AM
To: [log in to unmask]
Subject: DSSAT - PTF
Dear DSSAT Users,
iŽd like to know where to look up the internal pedo-transfer-function
DSSAT calculates DUL and LL according to after having entered grain
size fractions and organic Carbon content.
thanks for all advice.
best regards
Benjamin
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