Hermann Hellriegel

Hermann Hellriegel (October 21, 1831 – September 24, 1895)[1] was a German agricultural chemist who discovered that leguminous plants assimilate the free nitrogen of the atmosphere.

Hermann Hellriegel
Hermann Hellriegel.jpg
Born(1831-10-21)October 21, 1831
Mausitz, Saxony
DiedSeptember 24, 1895(1895-09-24) (aged 63)
Bernburg, Anhalt


He was born at Mausitz (near Pegau), in Saxony. In 1857 he became director of the agricultural experiment station of Brandenburg and Niederlausitz at Dahme, from which he resigned in 1873, and in 1882 accepted a similar post at Bernburg, where he died. From 1873 to 1882, he was Wanderlehrer (circuit riding teacher) at Bernburg.

Nitrogen fixationEdit

Among his many agricultural investigations with plants, the most important by far are his demonstration of the ability of leguminous plants to assimilate the free nitrogen of the air, and his discovery of the tubercles on the roots as the agency through which this takes place. The question of the ability of leguminous plants to use the nitrogen of the air had long been one of inquiry, and its settlement by him marked an epoch in the agricultural world. The important parts of these experiments he published in Untersuchungen über die Stickstoffnahrung der Gramineen und Leguminosen (Investigations into the Nitrogen assimilation of the Gramineae and Leguminosae; Berlin, 1888), and Ueber Stickstoffnahrung landwirtschaftlicher Kulturgewächse (On Nitrogen assimilation in agricultural crops; Vienna, 1890).


  1. ^ "Hermann Hellriegel". Nature. 53 (1358): 11. 1895. Bibcode:1895Natur..53Q..11.. doi:10.1038/053011a0.


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