New classes: soil compaction, soil compaction categories

[celineaubert]

soil compaction

• subclassOf inheres in soil
• definition Soil compaction is the increase of bulk density or decrease in porosity of soil due to externally or internally applied loads. https://en.wikipedia.org/wiki/Soil_compaction_(agriculture)

soil compaction categories

http://extension.psu.edu/plants/crops/soil-management/soil-compaction/diagnosing-soil-compaction-using-a-penetrometer

• little to none soil compaction
  The soil is considered as having little to none compaction if there are less than 30% of measuring points with a cone index superior to 300 psi in the top 15 inches.
• slight soil compaction
  The soil is considered as having slight compaction if there are between 30% to 50% of measuring points with a cone index superior to 300 psi in the top 15 inches.
• moderate soil compaction
  The soil is considered as having moderate compaction if there are between 51% to 75% of measuring points with a cone index superior to 300 psi in the top 15 inches.
• severe soil compaction
  The soil is considered as having severe compaction if there are more than 75% of measuring points with a cone index superior to 300 psi in the top 15 inches.

[kaiiam]

Hey @pbuttigieg if we add @celineaubert 's soil compaction terms, perhaps we could link them to a the new ENVO:compaction process, maybe with the RO:produced by relation?

These definitions include percentages and units, which normally @pbuttigieg you don't want to include in a definition unless there is a reliable domain standard. Should definitions be formulated with or without the units in this case?

[pbuttigieg]

Hey @pbuttigieg if we add @celineaubert 's soil compaction terms, perhaps we could link them to a the new ENVO:compaction process, maybe with the RO:produced by relation?

Yes, this sounds reasonable; the structure would be something like:

compaction process
- soil compaction process
-- very slight soil compaction (was little to no...)
-- slight soil compaction
-- moderate soil compaction
-- severe soil compaction

You could add a subclass axiom like has output some compacted soil for the soil compaction process class. You could define compacted soil as soil and 'has quality' some condensed where you'd get condensed from PATO.

Another issue is that we can't represent "no soil compaction" so that class will have to be changed to very slight soil compaction with at least some compaction (i.e. >0%).

These definitions include percentages and units, which normally @pbuttigieg you don't want to include in a definition unless there is a reliable domain standard. Should definitions be formulated with or without the units in this case?

Preferably, the definitions of the classes would not commit to any thresholds - I think these should be asserted at the information or data layer as they can change from community to community. We'd say Y has greater compaction than X and less compaction than Z in the free text def. @cmungall are there RO/PATO patterns to express that neatly?

The def for soil compaction that @celineaubert suggested looks quite good. A little rephrasing:

Soil compaction is a compaction process during which the bulk density of soil increases and/or its porosity decreases due to externally or internally applied loads.

[kaiiam]

Hey @celineaubert and @pbuttigieg, I am attempting to addressing this issue in #487

[cmungall]

+1 to all points

I would not try directly axiomatizing the differences between the 5 partitions. Better to use the shunt pattern here

[kaiiam]

@celineaubert @pbuttigieg Unfortunately due to time constraints I will not be able to address these issues in #487 pull request 3 for project cryophile.