From: Mike
Freeman [mike.freeman@freemanenvironmental.co.nz]
Sent: Tuesday,
10 November 2009 8:14 a.m.
To: Tony
Petch
Cc: Gillian
Ensor
Subject: Overseer
sensitivity analysis
Hi
Tony
Apologies, another nutrient related query...
The commissioners for the Upper Waitaki irrigation development hearings have
asked us to undertake a sensitivity analysis of Overseer.
I see that Dr Ledgard from AgResearch recently stated to the Horizons One Plan
hearing:
"An OVERSEER input sensitivity analysis for N leaching was carried out in
2006 for
Environment Waikato, using contrasting farm types. The most sensitive
farmer-derived
input variables were: amount and timing of N fertiliser; stocking rate, type
and animal
productivity; and winter management practices. These factors highlight the
importance
of good farm records. The most sensitive user-derived variables were: rainfall;
pasture
development status; and clover content. For each variable, users should take a
consistent approach in order to minimise inaccuracy."
Would it be possible to get a copy of that report/analysis?
There are issues involved in asking AgResearch for that information because
they are acting for the applicants.
Many thanks Tony.
If there are any costs involved please let me know.
Regards
Mike
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