http://www.vocabularyserver.com/gemet/en/http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=883biomass http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=883 phytomass NT http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=883 ecological parameter BT