Soils and their distribution on Bambouto volcanic mountain, West Cameroon highland, Central Africa

Tixier, Paul; Kengni, Lucas; Bitom, Dieudonné; Hodson, Mark E.; Fopoussi, J.C.; Leumbe, O.; Mpakam, H.G.; Tsozué, Désiré

doi:10.1016/j.jafrearsci.2004.07.020

Cited by 39 publications

(47 citation statements)

References 5 publications

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“…The spatial organization and the number of these different pedological units vary from one ecosystem to another, and moreover, some of their morphological, mineralogical and geochemical characteristics also appear to be specific to each ecosystem. These results agree with those of other authors in other parts of the world [5,6,7,12,14,15].…”

Section: Major Petrological and Geochemical Features Of Tropical Soilsupporting

confidence: 94%

“…In the high plateaus, the ferruginous duricrusts are replaced by bauxitic duricrusts [9,10]. Finally in the tropical mountainous landscapes, andosols are predominant notably on volcanic rocks [11][12][13][14][15]. Associated with these three ecosystems are low plateaus and depressions (<400 m altitude) where sedimentation processes condition the soil's *Address correspondence to this author at the Laboratory of Soil Science, Faculty of Science, University of Yaoundé 1, B.P.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Altitude on the Petrological Features of a Soil Climosequence in the Humid Tropical Zone of Cameroon

Bitom¹

2013

TOGEOJ

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Although lateritic soils are well documented in the humid tropical zone, work on adiabatic effect, which imposes local climatic variations with increasing altitude, has received very little attention in this zone. The aim of this work was to study and specify a soil climosequence in the humid tropical zone of Cameroon and to show the influence of altitude on the geochemical functioning of tropical soils. The work was done in the field and completed by a battery of laboratory analyses. The results enabled the definition of a soil climosequence for the humid tropical zone in Cameroon. This climosequence is marked by soils whose evolution is conditioned by the geochemistry of iron, silicon and aluminium. In the plateau ecosystems (500-800 m altitude), iron is expressed either as hardened materials (e.g. ferruginous nodules or duricrust) or light patches on the soils, while silicon and aluminium are combined as kaolinite. In the high plateaus (800-2000 m altitude), soil evolution is dominated by aluminium geochemistry, where aluminium forms gibbsite (either indurated or loose) often associated with small amounts of goethite and hematite. Finally, in the mountainous massifs (> 2000 m altitude), soil evolution is controlled by silica geochemistry, where silica is combined with amorphous aluminium to form allophane. In this soil, the presence of a dark and thick humiferous andosolic horizon in the upper part of the profile is very remarkable. Overall, this soil climosequence reflects geochemical functioning processes which grade with altitude in the humid tropical zone of Cameroon, similar to that commonly observed under the temperate climate. This general scheme could be extrapolated to other humid tropical regions with similar climatic and relief conditions as those observed in Cameroon. However, this general tendency often includes site-specific modifications caused by human activity and local variations of environmental conditions.

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Section: Major Petrological and Geochemical Features Of Tropical Soilsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Influence of Altitude on the Petrological Features of a Soil Climosequence in the Humid Tropical Zone of Cameroon

Bitom¹

2013

TOGEOJ

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“…The thermal gravimetric curves of the raw andosols have shown a possible dehydration and dehydroxylation of amorphous minerals notably allophane between 100 and 183 °C [26]. Gibbsite dehydration occurs at about 320 °C: (2Al(OH) 3 Al 2 O 3 +3H 2 O), while goethite dehydration takes place from 320 °C (2FeO.OH Fe 2 O 3 + H 2 O). Those minerals therefore lose their hydroxyl groups (S-OH) responsible for the fixing of phosphate anions [42,8].…”

Section: Influence Of Organic Mattermentioning

confidence: 99%

“…The main regions of the world that favour the formation and the conservation of andosols are those of recent volcanic activity outstandingly Japan, New Zealand, America (The Andes mountain range), France (Massif central), Cameroon (Mount Cameroon, Bambouto mountains), the Antilles… [1][2][3][4]. The works of Tematio et al [3] and Tematio [4] in the Mount Bambouto situated in West Cameroon (Central Africa), have revealed the presence of organic matter-rich (8-23 %) andosols in the upper part of the massif that extends between 2000 and 2740 m altitude .…”

Section: Introductionmentioning

confidence: 99%

“…The works of Tematio et al [3] and Tematio [4] in the Mount Bambouto situated in West Cameroon (Central Africa), have revealed the presence of organic matter-rich (8-23 %) andosols in the upper part of the massif that extends between 2000 and 2740 m altitude . This zone is marked by a fresh, humid (2510 mm of rainfall/year) and cloudy climate.…”

Section: Introductionmentioning

confidence: 99%

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Andosols of the Bambouto Mountains (West Cameroon): Characteristics, Superficial Properties - Study of the Phosphate Ions Adsorption

Mermoz¹,

Emmanuel²,

Dieudonné³

et al. 2008

TOICJ

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Abstract:The present work is focussed on the characterisation and the study of the surface properties of the Mount Bambouto andosols in view of their use in the adsorption of phosphate ions. The particle size distribution analysis has revealed a low clay content (9 %) meanwhile the silt content is high (70 %). Some surface properties like zero point charge (4.4), cationic exchange capacity (32.2 meq/100g), surface area (50.12 m 2 /g) of the material were measured. The adsorption kinetics of the phosphate ions is of second order. The removal of organic matter using hydrogen peroxide aqueous solutions enables to increase the quantity of the adsorbed phosphate ions at pH 6.6 from 4.15 mg/g to 6.10 mg/g. Minerals with hydroxyl groups like allophane, gibbsite and goethite are responsible for the phosphate ions adsorption but these hydroxyl groups are destroyed in acidic medium. The raw andosol adsorbs much more phosphate ions than its fine fraction (0-2 m) because of the destruction of the allophane -humus complex during various extraction operations (crushing and dispersing).

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Farmland Management Strategies by Smallholder Farmers in the Mount Bamboutos Landscape in Cameroon

Nkembi,

Mubeteneh,

Nji

et al. 2023

Satoyama Initiative Thematic Review

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Soils and their distribution on Bambouto volcanic mountain, West Cameroon highland, Central Africa

Cited by 39 publications

References 5 publications

Influence of Altitude on the Petrological Features of a Soil Climosequence in the Humid Tropical Zone of Cameroon

Influence of Altitude on the Petrological Features of a Soil Climosequence in the Humid Tropical Zone of Cameroon

Andosols of the Bambouto Mountains (West Cameroon): Characteristics, Superficial Properties - Study of the Phosphate Ions Adsorption

Farmland Management Strategies by Smallholder Farmers in the Mount Bamboutos Landscape in Cameroon

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