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Title Significance of iron oxides and calcium carbonate particle size in phosphate sorption by calcareous soils
Creator/Author Ryan, J. ; Curtin, D. ; Cheema, M.A.
Publication Date1985 Sep 01
OSTI IdentifierOSTI ID: 6294402
Other Number(s)CODEN: SSSJD
Resource TypeConference
Specific TypeJournal Article
Resource RelationSoil Sci. Soc. Am. J. ; Vol/Issue: 48:5; 48. annual meeting, Soil Science Society of America; 25-30 Nov 1984; Las Vegas, NV, USA
Research OrgMassey College, Palmerston, New Zealand
Subject510100 -- Environment, Terrestrial-- Basic Studies-- (-1989); IRON OXIDES-- SOIL CHEMISTRY;PHOSPHORUS-- SOIL CHEMISTRY; BIOLOGICAL AVAILABILITY;CALCIUM CARBONATES;CORRELATIONS;FERTILIZERS;LEBANON;PHOSPHATES;SOILS;SORPTION
Related SubjectALKALINE EARTH METAL COMPOUNDS;ASIA;CALCIUM COMPOUNDS;CARBON COMPOUNDS;CARBONATES;CHALCOGENIDES;CHEMISTRY;DEVELOPING COUNTRIES;ELEMENTS;IRON COMPOUNDS;MIDDLE EAST;NONMETALS;OXIDES;OXYGEN COMPOUNDS;PHOSPHORUS COMPOUNDS;TRANSITION ELEMENT COMPOUNDS
Description/Abstract Though many soil components are involved in reactions whereby soluble fertilizer P is converted to less soluble and therefore less available forms, the relative influence of each phase in this process is not clearly defined.^While both crystalline and amorphous Fe oxides readily react with P in noncalcareous soils, the contribution of these forms to P sorption in calcareous soils has received little attention.^Thus, in this study, samples of 20 mainly calcareous Lebanese soils, ranging widely in relevant properties, were equilibrated for 6 d with 25 mL P solutions ranging from 12.5 to 62.5 mg kg . The data did not conform to the conventional Langmuir isotherm.^Correlations and regression coefficients with actual P retention from solution indicated an involvement of oxalate Fe, but there was no effect of CaCO3 particle size.^Removal of Fe prior to equilibration had an inconsistent effect on P retention.^The P behavior of calcareous soils may be modified by Fe oxides in such soils.^7 references, 2 tables.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 74-76
System Entry Date2001 May 13

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