http://vocab.lternet.edu/vocab/vocab/ LTER Controlled Vocabulary jporter jporter 2018-09-19 en 2011-01-14 17:12:33 forest floor 2011-01-14 17:12:33http://vocab.lternet.edu/vocab/vocab/skos/694http://vocab.lternet.edu/vocab/vocab/skos/2http://vocab.lternet.edu/vocab/vocab/skos/535