Toposequence Study of Soils along Donga River in Manya, Takum Local Government Area Taraba State, Northeast Nigeria
A toposequence soils study was undertaken along Donga River in Manya, Takum LGA Northeast Nigeria. Three (3) profile pits were sunk using physiographic positions (upper slope, mid-slope and valley bottom) and the soil samples were collected based on genetic horizon differentiation, the samples we...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Bulgarian Soil Science Society
2022-11-01
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| Series: | Bulgarian Journal of Soil Science |
| Subjects: | |
| Online Access: | https://www.bsss.bg/issues/Issue2_2022/BJSS_2022_2_2.pdf |
| Summary: | A toposequence soils study was undertaken along Donga River in Manya,
Takum LGA Northeast Nigeria. Three (3) profile pits were sunk using physiographic
positions (upper slope, mid-slope and valley bottom) and the soil samples were
collected based on genetic horizon differentiation, the samples were subjected to
routine laboratory analysis. Data generated was analyzed statistically using coefficient
of variance and weighted mean. All profile pits were geo-referenced using hand held
GPS receiver. Soil colour ranged from dark brown (7.5YR 3/2) in the Ap horizons to
strong brown (7.5YR 5/8) in the Bt horizons. Sand and silt dominated the fractions
(sand mean content 43.00 g/kg1
, 71.47 g/kg1 and 39.64 for Pedons 1, 2 and 3
respectively and silt mean at Bt2 had 558 g/kg1
, 366 g/kg1 and 680 g/kg1
for Pedons
1, 2 and 3 respectively). The bulk density was higher in the top soils than in the sub
soils, the highest mean was recorded in pedon 3 (1.57 g/cm3
). The silt clay ratio
(SCR) was indicative of soils with weatherable minerals. The soil pH ranged from
moderately acid to slightly acid (6.48, 5.80, 5.95) in pedons 1, 2 and 3 respectively.
The negative ∆pH values obtained are indicative that the colloidal fraction had
exchangeable capacity. The total nitrogen was rated low while available phosphorus
was rated very high to high. The percentage base saturation had mean from 96.72%,
97.12% and 95.79% in pedons 1,2 and 3 respectively, suggestive of Alfisols -Entisols
mix. There were varied results for coefficient of variation (CV) in soil properties
among the different positions on the toposequence. Therefore, the soils were
classified as Typic Isohyperthermic Haplustalfs in pedons 2 and 3 with fluvic
characters in pedon 1 (USDA) which corresponded to Arenic Luvisols (WRB). |
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| ISSN: | 2534-8787 2367-9212 |