NERC parameter usage vocabulary - test

[meganrwong]

Questions relating to the trial of the the observable properties as measured and reported by the scma soil chem methods handbook. Based on https://github.com/CSIRO-enviro-informatics/PUV-ont

The parameters that these methods are a measure of - some are easier to break out following NERC ontology pattern. Some are not as straight forward. Throwing some thoughts/questions up here to help get a better feel of how we may model - yet to get RDF examples up obviously.

The methods up front of book throw curlier questions, should get more repetitive/easier with the other chapters here is hoping....

[meganrwong]

method http://anzsoil.org/def/au/scm/2A1
air-dried moisture content (PO1 equiv) would have sample preparation (S03 equiv) of 'air dried'.

is in contrast to http://anzsoil.org/def/au/scm/3A1
which reports 'Electrical conductivity (EC) at 25°C on an air-dry (40°C) basis'
looking at NERC example, it looks like 'on-air-dry (40 degC) basis' is a Measurement-Matrix relationship https://vocab.nerc.ac.uk/collection/S02/current/ - S02003

looking for feedback on my interpretation here

[meganrwong]

Estimated soluble salts concentration, estimated as Electrical conductivity

Property (S06 equiv) is 'Soil ionic strength' (or 'ionic strength' - if we were to be consistent w out ASLS modelling I'd say it is just ionic strength)
Data processing method is 'estimated'
(plus the method and related UoM, quantity kind)

thoughts?

[meganrwong]

'Estimated soluble salts concentration, estimated as Electrical conductivity '
is
Property (S06 equiv) - Concentration of soluble salts
Data processing method (S05 equiv) is 'estimated as Electrical Conductivity - I think!?!
Plus the related method, UoM and quantity kind)

thoughts?

[meganrwong]

Parameter - 'Redox potential - field Eh values, retaining information on point-to-point variability'
http://anzsoil.org/def/au/scm/3D1

property: Redox potential
analytical method would also be http://anzsoil.org/def/au/scm/3D1
Data processing method - 'retaining information on point-to-point variability'

question - I'm a bit stumped on where 'field Eh values' would fit - it could be under a 2nd analytical method, but I'm leaning more toward it being a data processing method?

[meganrwong]

Parameter -
pH (1:5 soil/water) on an air-dry basis
property - pH
analytical method - http://anzsoil.org/def/au/scm/4A1
measurement matrix relationship (I think!?) - 'in an air-dried basis
phase (S23 equiv) - 1:5 soil/water

[dr-shorthair]

Indeed, there is some inconsistency in the NVS vocabs. The granularity level of S06 and S03 varies. Do your best but don't stress too much. If in doubt: think about the use-case. I.e. how does factoring the parameter assist in discovery, and what terms would a user want to use in their search. There may be more than one answer.

[meganrwong]

Up to end of nitrogen chapter. Main places stuck to talk through -

• Parameters are becoming very lengthy (same as methods) or too short (perhaps not unique enough for the different things they are a measure of)
• When there is more than one element measured eg 'Mineral N'
• Ratios - how best to represent, when they are different forms of elements they measure, and different method combinations that measure them
• Elements - where to put things like "total organic carbon", "Potentially mineralisable nitrogen (PMN)" and 'total Nitrogen' - are these the property or the element? NERC's S27 is elements, compounds, isotopes and mixtures. If they are a property rather than an element, perhaps they will look something like 'concentration of potentially mineralisable N' and ' proportion of total N', and the elements and compounds they measure are in our S27 equivalent (such as NH4, NO3)