f_time_norm_focus function

Normalisation factors for aerobic soil degradation according to FOCUS guidance

Time step normalisation factors for aerobic soil degradation as described in Appendix 8 to the FOCUS kinetics guidance (FOCUS 2014, p. 369).

f_time_norm_focus(object, ...)

## S3 method for class 'numeric'
f_time_norm_focus(
  object,
  moisture = NA,
  field_moisture = NA,
  temperature = object,
  Q10 = 2.58,
  walker = 0.7,
  f_na = NA,
  ...
)

## S3 method for class 'mkindsg'
f_time_norm_focus(
  object,
  study_moisture_ref_source = c("auto", "meta", "focus"),
  Q10 = 2.58,
  walker = 0.7,
  f_na = NA,
  ...
)

Arguments

• object: An object containing information used for the calculations
• ...: Currently not used
• moisture: Numeric vector of moisture contents in % w/w
• field_moisture: Numeric vector of moisture contents at field capacity (pF2) in % w/w
• temperature: Numeric vector of temperatures in °C
• Q10: The Q10 value used for temperature normalisation
• walker: The Walker exponent used for moisture normalisation
• f_na: The factor to use for NA values. If set to NA, only factors for complete cases will be returned.
• study_moisture_ref_source: Source for the reference value used to calculate the study moisture. If 'auto', preference is given to a reference moisture given in the meta information, otherwise the focus soil moisture for the soil class is used

Examples

f_time_norm_focus(25, 20, 25) # 1.37, compare FOCUS 2014 p. 184

D24_2014$meta
# No moisture normalisation in the first dataset, so we use f_na = 1 to get
# temperature only normalisation as in the EU evaluation
f_time_norm_focus(D24_2014, study_moisture_ref_source = "focus", f_na = 1)

References

FOCUS (2006) Guidance Document on Estimating Persistence and Degradation Kineticsfrom Environmental Fate Studies on Pesticides in EU Registration Report of the FOCUS Work Group on Degradation Kinetics, EC Document Reference Sanco/10058/2005 version 2.0, 434 pp, http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics

FOCUS (2014) Generic guidance for Estimating Persistence and Degradation Kineticsfrom Environmental Fate Studies on Pesticides in EU Registration Report of the FOCUS Work Group on Degradation Kinetics, Version 1.1, 18 December 2014 http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics

See Also

focus_soil_moisture