Extractable Iron and Aluminum Effects on Phosphate Sorption in a Savanna Alfisol

2003 ◽  
Vol 67 (2) ◽  
pp. 589 ◽  
Author(s):  
John O. Agbenin
Keyword(s):  
Phosphate Sorption ◽  
Extractable Iron

Effects of waterlogging and subsequent drainage of a pasture soil on phosphate sorption, extractable phosphate and oxalate-extractable iron

Soil Research ◽  
1984 ◽  
Vol 22 (4) ◽  
pp. 455 ◽  
Author(s):  
J Bradley ◽  
I Vimpany ◽  
PJ Nicholls
Keyword(s):  
New South ◽  
New South Wales ◽  
Phosphate Sorption ◽  
Subsequent Oxidation ◽  
Pasture Soil ◽  
South Wales ◽  
Reduction Of Iron ◽  
Response Equation ◽  
Extractable Iron ◽  
Bray 1

Undisturbed cores of a pasture soil from the central tablelands of New South Wales were waterlogged for periods varying from 4 to 42 days and then drained to simulate seasonal waterlogging. Phosphate sorption, Bray 1 extractable phosphate and oxalate-extractable iron levels were measured before watering, at the end of waterlogging and up to 90 days after draining. Increasing the duration of waterlogging increased the logarithms of phosphate sorption and Bray 1 extractable phosphate linearly, but the response equation of log oxalate iron was significantly quadratic. When drained, all three levels fell, but the positive sorption response to waterlogging remained 90 days after draining. These results are consistent with those from previous studies that found phosphate solubility to be associated with the reduction of iron during waterlogging and its subsequent oxidation on drying. The agronomic implication of the findings for superphosphate topdressing of seasonally waterlogged soils is discussed.

Phosphate sorption by jurassic oolitic limestones

Geoderma ◽  
1975 ◽  
Vol 13 (3) ◽  
pp. 257-264 ◽  
Author(s):  
I.C.R. Holford ◽  
G.E.G. Mattingly
Keyword(s):  
Phosphate Sorption

scholarly journals A Comparison of some Upland and Valley Soils in the Ungava-Labrador Peninsula

2007 ◽  
Vol 38 (3) ◽  
pp. 243-256 ◽  
Author(s):  
William H. Hendershot
Keyword(s):  
Soil Temperature ◽  
Black Spruce ◽  
Carbon Accumulation ◽  
Shallow Depth ◽  
Soil Profiles ◽  
Tree Line ◽  
Climatic Regions ◽  
Coarse Texture ◽  
Active Mixing ◽  
Extractable Iron

ABSTRACT Thirteen soil profiles from northern Québec and Labrador, Canada, near the northern tree-line, were sampled and analysed. Five of these, located on poorly to imperfectly drained sites, are strongly cryoturbated soils with permafrost at a shallow depth. Below the surface horizon they have very uniform profile distributions of pH, carbon and extractable iron and aluminum due to the active mixing of the horizons. The eight soils from well-drained sites have profiles similar to those of soils in similar settings in more temperate climatic regions. One of these, developed in one of the most northerly valleys having a black spruce-larch forest vegetation, has the characteristics of a podzol (spodosol) except that the podzolic B (spodic) horizon is too thin. The other seven profiles all have color B horizons, although the coarse texture prevents their classification as cambic horizons; these soils all have carbon-rich A horizons varying in thickness from 1.5 to 20 cm. Soil temperature at 50 cm depth closely follows the elevational and latitudinal distribution of the soils; a range of 0 to 10° C was observed. Soil development, measured as depth of solum, organic carbon accumulation or degree of B horizon development, is closely related to soil temperature and site position. The presence of permanently frozen ice layers at shallow depth has a marked influence on soil genesis and the properties of the resultant soils.

ORGANIC MATTER DELAYS BUT DOES NOT PREVENT PHOSPHATE SORPTION BY CERRADO SOILS FROM BRAZIL

Soil Science ◽  
1995 ◽  
Vol 159 (3) ◽  
pp. 207-211 ◽  
Author(s):  
E. AFIF ◽  
V. BARRÓN ◽  
J. TORRENT
Keyword(s):  
Organic Matter ◽  
Phosphate Sorption

Phosphate sorption by calcium carbonate in some soils of the Mediterranean part of Spain

Geoderma ◽  
1988 ◽  
Vol 42 (3-4) ◽  
pp. 261-269 ◽  
Author(s):  
C. Borrero ◽  
F. Peña ◽  
J. Torrent
Keyword(s):  
Calcium Carbonate ◽  
Phosphate Sorption ◽  
The Mediterranean
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