Definition: The quotient of the dry weight of the shoots produced during a given growth period divided by the dry weight of the roots esp. for crop plants.
Comment: Replace with http://purl.obolibrary.org/obo/TO_0000278
Definition: The quotient of the dry weight of the shoots produced during a given growth period divided by the dry weight of the roots esp. for crop plants.
Comment: Replace with http://purl.obolibrary.org/obo/TO_0000278