[word=□]
[word=inorganic]
' Other inorganic substances ' consists of all inorganic substances except acids , bases , ammonia and chlorine . With over 22 million organic and inorganic substances currently registered in Chemical Abstracts and so many ways to represent them , the complexities of substance searching can seem overwhelming . The two databases , Beilstein ( organic ) and Gmelin ( inorganic ) , collectively comprise more than 9 million organic , inorganic and organometallic compounds . In alpine dry meadows diversity responses occur at 4-10 kg N ha-1 yr-1 , while changes in soil inorganic N pools and nitrification occur at inputs between 10-20 kg N ha-1 yr-1 .