You are using an old browser that may not function as expected. For a better, safer browsing experience, please upgrade your browser.

Log in Become a Member


Colourless, odourless and tasteless gas (N = nitrogenium) which, at 78% by volume, makes up by far the largest proportion in the air. The German name reminds us that nitrogen "smothers" (extinguishes) flames. Among other things, the nitrogen compounds amino acids, alkaloids, ammonium (compound with hydrogen, most common starting material for fertilisers), enzymes, nitrates and saltpetre are of great importance. 95% of the nitrogen in the soil is in the form of organic compounds (Norg) in humus formed from dead plant and animal material, in living root mass and in soil organisms. A maximum of 5% is mineral-bound nitrogen (Nmin) already available to plants in the form of ammonium (hydrogen compound) and nitrate = saltpetre (oxygen compound). However, the organic nitrogen compounds are not available to higher-value plants. They must first be converted by bacteria into ammonium and nitrate, which thus play an important role in plant growth. The roots prefer to take up nitrates, which are responsible for building up cell protein and chlorophyll during photosynthesis.

Voices of our members

Roman Horvath MW

wein.plus is a handy, efficient guide to a quick overview of the colourful world of wines, winegrowers and grape varieties. In Wine lexicon, the most comprehensive of its kind in the world, you will find around 24,000 keywords on the subject of grape varieties, wineries, wine-growing regions and much more.

Roman Horvath MW
Domäne Wachau (Wachau)

The world's largest Lexicon of wine terms.

25,898 Keywords · 46,878 Synonyms · 5,330 Translations · 31,235 Pronunciations · 179,529 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon