Louis,

Its Arnold not Arnolg, anyway, tahks for the information and idea. If you would not mind what if I was just running 1 season simulation or forecast, what do you recommend the start of simlulation date with reference to planting date?

Thanks and regards,

Arnold

Louis du Pisani <[log in to unmask]> wrote:
Arnolg,
Of course your starting date will have a lot to do with your yield because
this has everything to do with the amount of water in the soil when
planting. I have found that only if I start two years before planting date
can I have confidence in the modeled staring water content. So, whenever I
make a 30-year run, I run 32 years of simulation and throw away the first
two years. If you have a good handle on moisture content when starting
simulation, this would help.
Louis du Pisani
----- Original Message -----
From: "Arnold Salvacion"
To:
Sent: Tuesday, November 08, 2005 1:54 AM
Subject: Date of Simulation


Dear Colleagues,

Greetings!

Recently I run a simulation in CERES-Maize and I found out that whenever I
change the starting date for simulation,there were variation in the yield
output data. Can anybody explain why is this so? and I just want to ask if
there's any standard date to start simulation in relation to the planting
date?

Thank you and best regards,





Arnold R. Salvacion
___________________
University Research Associate
Institute of Statistics (INSTAT)
3rd Floor, Physical Science Building
University of The Philippines, Los Baños
College, Laguna
Telefax: 049.536.2381
E-mail: [log in to unmask]




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