IntelliPaper
Abstract
Phosphorus concentration in grain size fraction of soils is significant in estimating soil P retention capacity and sustainable environmental management. Phosphorus forms (total, organic, saloid, Al, Fe, Ca and residual) in grain size fractions of soils of three land units (upland, levee and backswamp) in Egbema were evaluated using sequential extraction procedures. Phosphorus forms differed distinctly (LSD 0.05) with grain size fractions, being a decreasing order of total P > organic P > occluded P > residual P > Fe-P > Al- P > Ca-P > saloid P > H20 soluble P in sand fractions of the levee and backswamp and total P > organic P > residual P > Fe-P > Al- P > occluded P > Ca-P > saloid P = H20 soluble P in that of upland units, total P > organic P > residual P > Fe-P > Al-P > occluded P > Ca-P = saloid P > water soluble P in silt fractions of upland, total P > organic P > residual P > occluded P > Fe-P > Al-P = Ca-P > saloid P > water soluble P in the levee and total P > organic P > residual P > Fe-P > occluded P > Al-P > Ca-P > saloid P > water soluble P in that of backswamp and total P > organic P > Fe-P > Al-P > residual P > occluded P > Ca-P > saloid P > water soluble P in clay fraction of the upland, total P > organic P > occluded P > residual P > Fe-P > Al-P > saloid P > Ca-P > water soluble P in the levee and total P > organic P > residual P > Fe-P > Al-P > occluded P > Ca-P > saloid P > water soluble P in that of backswamp. Averaged over P forms, concentrations were higher in clay than other grain size fractions and in the subsoil than surface soil of most land units. This suggests that clay soils will be most active in regulating P activities in the land units.
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Conflict of Interest
The authors declare no conflict of interest.
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Not applicable
Data Availability
The datasets used in this study are openly available at [repository link] and the source code is available on GitHub at [GitHub link].
Funding
This work did not receive any external funding.
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