There is quite a lot of papers using this formula but they don't agree about the references. Most of them cite the works of KENG and/or UEHARA (1973; 1974; 1979; etc). Recently I had access to their paper from 1979 (Chemistry, Mineralogy, and Taxonomy of Oxisols and Ultisols), which seems to be one of their major works about this topic. Unfortunately, I couldn't find any relation between the above mentioned equation and the cited reference. I'd appreciate your expertise. The work I have mentioned follows attached.
http://pdf.usaid.gov/pdf_docs/PNAAC360.pdf
GoroU was one most certainly behind this approximation.
Delta pH is the key and may been empirically related to PZC via regression.
There was a "compulsive" dilute MgCl2 displacement involved as well. Just google the classic soil chem lit, you'll catch on to something.
Dear Professor Daniel. As explained at my question's description, the literature "googling" brought me to where I am right now. The most cited authors related to the topic are Uehara & Keng. Never heard of Gorou before. Unfortunately, when I had access to one of their major papers I couldn't find any reference to the so famous equation. Brazilian researchers cite this equation a lot and it is widely taught in BSc courses over here.
- Badges
- Science topic
- Similar topics
- Agriculture
- Soil Science