Soil tests for copper, iron, manganese, and zinc in histosols. 2. The distributions of soil iron and manganese in sequentially extractable forms
Journal Article
·
· Soil Sci.; (United States)
OSTI ID:6247948
The authors identified and quantified the immediately available and the reserve forms of Fe and Mn in 55 cultivated organic solid to assist selection of a reliable soil test for Fe and Mn in such soils. Soil Fe and Mn were sequentially partitioned into (1) H/sub 2/O-soluble, (2) Ca-exchangeable, (3) free-oxide-associated, (4) weakly complexed, (5) strongly complexed, (6) carbonate-associated, and (7) sulfide-associated extractable forms by dissolution in (1) H/sub 2/O, and aqueous solutions of (2) CaCl/sub 2/, (3) CaCl/sub 2/ + hydroquinone, (4) CH/sub 3/COOH; (5) DTPA-TEA, (6) HCl, and (7) KCN, respectively. On an average, 66% of the total Fe was unextractable, 26% strongly complexed, 4% sulfide-associated, 3% in carbonates, 0.5% weakly complexed, 0.4% in association with free oxides, 0.2% H/sub 2/O-soluble, and 0.1% Ca-exchangeable. Of the average total Mn, 57% was unextractable, 18% associated with free oxides, 10% weakly complexed, 6.5% each strongly complexed and Ca-exchangeable, 0.9% in carbonates, 0.4% in sulfide, and 0.5% in H/sub 2/O-soluble forms. Of the average total Zn, 8.7% was in free oxides, 4.5% Ca-exchangeable, and 1.9% in H/sub 2/O-soluble forms. The immediately available forms of Fe in H/sub 2/O-soluble and Ca-exchangeable factions were indicated to be replenishable mainly by the strongly complexed form. The capacity factor for Mn was suggested to be more than one form of soil Mn.
- Research Organization:
- Agriculture Canada, Ottawa, Ontario
- OSTI ID:
- 6247948
- Journal Information:
- Soil Sci.; (United States), Journal Name: Soil Sci.; (United States) Vol. 145:2; ISSN SOSCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Soil tests for copper, iron, manganese, and zinc in histosols. 1. The influence of soil properties, iron, manganese, and zinc on the level and distribution of copper
Soil tests for copper, iron, manganese, and zinc in histosols. 3. A comparison of eight extractants for measuring active and reserve forms of the elements
Iron oxide forms and heavy metal transformations in sulfaquepts in Baltimore Harbor dredged materials
Journal Article
·
Mon Sep 01 00:00:00 EDT 1986
· Soil Sci.; (United States)
·
OSTI ID:6622121
Soil tests for copper, iron, manganese, and zinc in histosols. 3. A comparison of eight extractants for measuring active and reserve forms of the elements
Journal Article
·
Mon Feb 29 23:00:00 EST 1988
· Soil Sci.; (United States)
·
OSTI ID:6212237
Iron oxide forms and heavy metal transformations in sulfaquepts in Baltimore Harbor dredged materials
Thesis/Dissertation
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:6653723