Forms and Distribution of Potassium along a Toposequence on Basaltic Soils of Vom, Jos Plateau State of Nigeria

Forms and Distribution of Potassium along a Toposequence on Basaltic Soils of Vom, Jos Plateau State of Nigeria



M. A. Tijjani, A. A. David



The study was conducted in Vom, Jos Plateau state in the Southern Guinea
Savanna zone of Nigeria to accentuate the forms of potassium
distribution associated with topographic positions. The study area lies
between longitudes 080 45’ 01” and 80 47’ 56’’ E, latitudes 90 43’ 17’’
and 90 45’ 15’’ N, with an elevation of about 1270m above sea level. A
stratified purposive sampling procedure was adapted, where four
landscape positions were identified using Global Positioning System
(GPS). The crest, upper slope, middle, and lower slope positions were
identified, each representing changes in geomorphology. Two pedons were
georeferenced at each topographic position, where they were sunk and
described. Result show that the forms of K varied with topographic
positions. Potassium distribution varied from surface to subsurface in
different topographic positions. Water soluble K was higher at crest
surface (0.0569 cmolkg-1) and decreased with soil profile depth.
Exchangeable K has highest value of 0.1317 and 0.1308 cmol/kg-1 at both
lower slope positions in general. Non exchangeable K values where higher
at all surfaces than the subsurfaces of topographic positions. HCl
soluble K values were higher at lower and upper slopes surface,
moderately at middle and least at crest slope positions. Total K values
were higher at upper slope subsurface, middle, and lower slope surface
with low variations at the crest positions. However, the distribution of
the K forms did not shown a well – defined trend with respect to
topographic positions. 



10.22161/ijeab/2.1.26



http://ijeab.com/upload_document/issue_files/26%20IJEAB-JAN-2017-18-Forms%20and%20Distribution%20of%20Potassium%20along%20a%20Toposequence%20on%20Basaltic%20Soils%20of%20Vom,%20Jos%20Plateau%20State%20of%20Nigeria.pdf



ijeab.com/submit-paper/

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