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THE MOVEMENT AND PRECIPITATION OF IRON OXIDES IN PODZOL SOILSEuropean Journal of Soil Science, 1
- Publisher
- Wiley
- Copyright
- Copyright © 1958 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 1351-0754
- eISSN
- 1365-2389
- DOI
- 10.1111/j.1365-2389.1958.tb01901.x
- Publisher site
- See Article on Publisher Site
Abstract
Titration curves of humus suspensions (prepared from some representative podzol B horizons by acetylacetone extraction) in o.1 N KCL are Presented. The shape of each curve (in absence of added metal ions) and the apparent PK value (PKe) derived from it are affected by the amount of Al contained in the suspension. One soil extract (initial PH 3.6) had a C/Al ratio of 4.9 and gave PKe= 6.21, Whereas the amberlite‐treated extract (initial PH 2.6) had a C/Al ratio of 152 and PKe= 4.12. Extrapolation of PKe values to zero concentration of Al gave limiting values of 4.o and 3.8 for the humus extracted from a Queensland and a New Zealand podzol respectively. These figures are lower than those normally quoted for humic acid, but they may be characteristic of the translocated humus of podzols.
Journal
European Journal of Soil Science – Wiley
Published: Mar 1, 1958