Baron Justus von Liebig (May 12th, 1803 with Darmstadt, Germany - April 18th, 1873 with Munich, Germany) was a German Chimiste. He made major contributions to the Organic chemistry and agriculture.

He studied at the university of Bonn, with Karl Wilhelm Gottlob Kastner. When Kastner went to the university of Erlangen, Liebig accompanied it and received its doctorate in there 1822. It then obtained a purse of the government of the Hesse to study with Paris. With the support of Alexander von Humboldt it could work in the private laboratory of Louis Joseph Gay-Lussac.

In 1824 he became professor at the university of Gießen. He was then professor at the university of Munich of 1852 to 1873. He was high under Freiherr (baron) in 1845. He improved the analysis of the organic chemistry and discovered that the plants nourish primarily Azote by microbes making it possible to fix that of the air and to assimilate that mineral-bearing in the ground. One of its most famous achievements is the nitrogenized Engrais. He was also the first chemist to organize a Laboratoire as we know it nowadays.

See Law of Liebig on the minimum (or the law of the limiting factors).

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• bibliographical Biography and reference to the numerical sources in project VLP of the Institute max Planck of history of sciences