Yield trait - definition and classification errors

[celineaubert]

Hello,

I have noticed that some updates could be made to the Yield trait class to make it easier to understand by non-ontologists, and to make it more in line with the definition of a yield.

http://purl.obolibrary.org/obo/TO_0000371

A yield is a mass per unit area. The current definition does not include the unit area idea. Could you update it to : ''A plant trait that is the mass of a plant, or one or more constituents of a plant per unit area of land''. This defintion include the unit are idea and is easier to understand by non-experts.
Could you also add ''yield'', ''crop yield'', ''plant yield'' as exact synonyms?

Also, I noticed that some subclasses of Yield trait do not correspond to a yield (a weight is different from a yield), and would need to be moved under the right class:

• panicle to tiller ratio http://purl.obolibrary.org/obo/TO_0000453
• harvest index http://purl.obolibrary.org/obo/TO_0000128
• plant dry weight http://purl.obolibrary.org/obo/TO_0000352
• plant fresh weight http://purl.obolibrary.org/obo/TO_0000442
• relative biomass http://purl.obolibrary.org/obo/TO_0000143
• root to total biomass ratio http://purl.obolibrary.org/obo/TO_0001019
• many subclasses of ''shoot system yield trait'' have a wrong name. Yield is often used instead of weight or ratio.
• classes in red below are not yield traits:
  

I'm happy to provide support to update this class.
Best,
Céline