Any substance assimilated by living things that promotes growth. The term is generally applied to nitrogen and phosphorus in wastewater, but is also applied to other essential and trace elements.
Sorce: World Bank
Check Also
Hydrochar turns agricultural waste into a powerful tool for healthier, carbon-rich soils
By converting waste biomass into hydrochar, farmers and land managers may be able to improve soil quality while contributing to carbon management.
Web-Resol Tudo sobre Limpeza Urbana e Resíduos Sólidos!