| Label | Id | |
|---|---|---|
| chlorophyll ratio | http://purl.obolibrary.org/obo/TO_0000298 | |
| chl a to chl b ratio | http://purl.obolibrary.org/obo/TO_0000298 | |
| chlorophyll content ratio | http://purl.obolibrary.org/obo/TO_0000298 | |
| chl-a to chl-b ratio | http://purl.obolibrary.org/obo/TO_0000298 |
