Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Soil improvement agent-en#Sense
Agente miglioratore del terreno-it#Sense
Sustancia mejorante del suelo-es#Sense
Bodenverbesserungsmittel-de#Sense
Agent d'amélioration du sol-fr#Sense