dear Arjan
it is called 'The Physiology of Crop Yield' by RKM Hay and JR Porter - published in 2006 by Blackwells.
best wishes
John R Porter
John R Porter DSc
Professor of Agroecology
Environment, Resources and Technology,
Faculty of Life Sciences
The University of Copenhagen
Hoejbakkegaard Alle 9
2630 Taastrup DENMARK
email: [log in to unmask]
vox: +45 3528 3377/3375
fax: +45 3528 3384
mobil: +45 2652 1484
Address from March 1 to April 15 2007
c/o Department of Ecology and Biosecurity
PO Box 84
Lincoln University
Lincoln 7647
Canterbury
New Zealand
.....Credeamus vita non ioca est...
>>> "Gijsman, Arjan J. (CIAT)" <[log in to unmask]> 03/24/07 3:07 PM >>>
Hi John,
You refer to chapter 9 in a book that you suggested earlier, but which book is this?
Thanks,
Arjan
-----Original Message-----
From: DSSAT - Crop Models and Applications [mailto:[log in to unmask]]On Behalf Of John Roy Porter
Sent: Thursday, March 22, 2007 6:21 PM
To: [log in to unmask]
Subject: Re: Maturity date for wheat
dear Steve
when you said you were doing an experiment I assumed you were growing real plants not virtual ones! I reallly suggest you learn about crop development in order to make sensible choices rather than just guess some new parameters that make your data fit. This is just curve fitting. I suggest you read chapter 9 of the book i suggested and look at the references therein.
best wishes
John R Porter
John R Porter DSc
Professor of Agroecology
Environment, Resources and Technology,
Faculty of Life Sciences
The University of Copenhagen
Hoejbakkegaard Alle 9
2630 Taastrup DENMARK
email: [log in to unmask]
vox: +45 3528 3377/3375
fax: +45 3528 3384
mobil: +45 2652 1484
Address from March 1 to April 15 2007
c/o Department of Ecology and Biosecurity
PO Box 84
Lincoln University
Lincoln 7647
Canterbury
New Zealand
.....Credeamus vita non ioca est...
>>> luo yi <[log in to unmask]> 03/22/07 11:28 PM >>>
Hi Steve,
Which version of DSSAT are you using? In DSSAT4.0, you can find the
parameters P1, P2, .... Adjust them, you can extend the growth period.
In the .ECO file,
! P1 Duration of phase end juvenile to double ridges (PVTU)
! P2 Duration of phase double ridges to end leaf growth (Leaf units or
TU)
! P3 Duration of phase end leaf growth to end spike growth (LU or TU)
! P4 Duration of phase end spike growth to end grain fill lag (TU)
Good Luck.
Luo Yi
On 3/23/07, Henein, Steven <[log in to unmask]> wrote:
>
> Hello everyone I'm wondering if anyone knows of how to adjust the length
> of growth of wheat. My current experiment has my maturity date at 71 days,
> does anyone know how I can extend that to at least 100?
>
> Thanks
> Steve
>
> Stephanos Mitchell Henein B.Sc, B.A
> Agriculture and Agri-Food Canada/Agriculture et Agroalimentaire Canada
> GIS Analyst & Support
> Telephone/Téléphone: 306-780-6567
> Facsimile/Télécopieur: 306-780-5018
> 1800 Hamilton Street, Suite 408
> Regina, Saskatchewan
> S4P4L2
> [log in to unmask]
>
> Agriculture and Agri-Food Canada - Agriculture et Agroalimentaire Canada
>
> -----Original Message-----
> From: DSSAT - Crop Models and Applications [mailto:[log in to unmask]]
> On Behalf Of Romeo Favreau
> Sent: Thursday, March 08, 2007 12:27 PM
> To: [log in to unmask]
> Subject:
>
> Who do | need to contact to obtain a copy of the Source code for DSSAT4?
>
>
>
> Romeo Favreau
>
> Plant Science Dept
>
> University of California at Davis
>
> [log in to unmask]
>
--
Dr. Luo Yi, Professor
=============================================================
Ecohydrological Model Development and Integrated Watershed Management
Institute of Geographic Science and Natural Resources Research(IGSNRR)
Chinese Academy of Sciences (CAS)
Datun Road, Anwai, Chaoyang District, 100101, Beijing, China
[log in to unmask], www.laol.fotoyard.net
+86-10-64888920 (Tel. & fax), Cell: 13501312277
===========================================
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