When did Justus von Liebig invent nitrogen fertilizer?

Answer 1

I am uncertain at what specific date Justus von Liebig made the discovery. However, it wasn't until 1842 that Sir John Lawes outlined a method of treating phosphate rock with sulfuric acid to produce superphosphate, an effective fertilizer, and the start of the modern chemical fertilizer industry began.

Considering that Justus von Liebig was born in 1803 (he died in 1873). it is safe to say that he made the discovery sometime between 1824 and 1842.

Answer 2

Justus von Liebig did not invent nitrogen fertilizer. He is more known for his contributions to organic chemistry and agriculture, particularly in the development of the concept of mineral nutrients in plant growth. The development of nitrogen fertilizer can be attributed to other scientists, such as Fritz Haber and Carl Bosch in the early 20th century.