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Specific fine root length

Formal name:  fine root length per fine root dry mass
Abbreviation:  SRL
Local identifier:  TOP937
Definition:  The ratio of the length (PATO:length) of a first order fine root (McCormack:fine root) to the corresponding first order fine root mass (PATO:mass) assessed after drying.
Formal Unit:  length unit / mass unit

Comment:  We suggest to specify fine roots by function (absorption versus transport) and branching order in addition to diameter (<= 2 mm).
Reference:  Pérez-Harguindeguy N., Díaz S., Garnier E., Lavorel S., Poorter H., Jaureguiberry P., Bret-Harte M. S., Cornwell W. K., Craine J. M., Gurvich D. E., Urcelay C., Veneklaas E. J., Reich P. B., Poorter L., Wright I. J., Ray P., Enrico L., Pausas J. G., de Vos A. C., Buchmann N., Funes G., Quétier F., Hodgson J. G., Thompson K., Morgan H. D., ter Steege H., van der Heijden M. G. A., Sack L., Blonder B., Poschlod P., Vaieretti M. V., Conti G., Staver A. C., Aquino S., Cornelissen J. H. C. (2013) New handbook for standardised measurement of plant functional traits worldwide. Australian Journal of Botany 61, 167_234 (adapted)