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Create a function `drainage_date_UK` that does not only respect the
beginning of the drainage period on 1 October, but also the end of the
drainage period on 30 April, and use it for determining the degradation
time. Applications early in the year before 1 May will now correctly be
calculated without degradation time.
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Also, address some R CMD check notes
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If a soil_DT50 was specified, and the application date was later than
the beginning of the drainage period (1 October), PECsw would increase.
Now the amount available at the time of the drainage period is equal
to the applied amount (minus interception) if application is later than
the beginning of the drainage period. Fixes #4. Thanks to @lutzeli for
spotting the problem.
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This makes more sense and is in line with mean() from base R. Adapt
tests and update docs.
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- PEC_sw_drainage_UK() gave results that were a little bit too high
for the substances with the highest Koc (>4000), as I used 0.01% instead
of 0.008% for them. This must have come from an old vesion of the UK
data requirements handbook, at least I do not have another explanation
- Add EFSA interception (from 2014 DegT50 guidance) and tier 1
crop wash-off factors (from 2017 PEC soil guidance) for some major
arable crops
- Update docs
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