Definition: Bud sources other than epicormic buds, apex, root crown, lignotuber, burl, rhizome, roots or storage organs, including those not clearly specified (e.g., stump).
Definition: Any material within 2 m from the Earth's surface that is in contact with the atmosphere, with the exclusion of living organisms, areas with continuous ice not covered by other material, and water bodies deeper than 2 m.
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