Felix Nelson Ponnamperuma, Sri Lankan pedologist (Galle, Ceylon 08 July 1920 – Kandy, Sri Lanka 11 December 1992)
Regarded as a world-renowned authority on chemistry of submerged soils
One of the firsts to apply thermodynamics to flooded soil systems
Explained quantitatively the kinetics of pH, redox potential, electrical conductivity and important ions in flooded soils