hellriegel

Updated: June 21, 2025

Hellriegel, back in 1886, made the incidental discovery that leguminous plants fixate nitrogen, and, hence, our fields of clover, alfalfa, cow-peas, and soybeans.

Francis B. (Francis Bail) Pearson - Reveries of a Schoolmaster

Sir Humphrey Davy, Baron von Liebig, Lawes and Gilbert, and Hellriegel followed DeSaussure and completely filled the nineteenth century with accumulated scientific facts relating to soils and plant growth.

Cyril G. (Cyril George) Hopkins - The Story of the Soil; from the Basis of Absolute Science and Real Life,