[ Caractéristiques morphologiques et physico-chimiques des sols savanicoles le long de toposéquences à Gogbala dans le Nord de la Côte d’Ivoire ]
Volume 25, Issue 1, December 2018, Pages 437–445
Olayossimi ADECHINA1, Ouattara Amidou2, and N’Ganzoua Kouamé René3
1 Département de pédologie et Minéralogie des sols, UFR des Sciences de la Terre et des Ressources Minières, Université Félix Houphouët-Boigny, BP 582 Abidjan 22, Côte d'Ivoire
2 Département des Sciences du Sol, Université Félix Houphouêt-Boigny, UFR des Sciences de la terre et des Ressources minières, Abidjan, Côte d'Ivoire
3 Département de Pédologie, Université Jean Lorougnon Guédé, UFR Agroforesterie, Daloa, Côte d'Ivoire
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study is focused on the soil morphological and physico-chemical characteristics of soils influenced by the topographical factor in Savanna area. It was carried out along three toposequences in Gogbala area of Korhogo Department, Northern Côte d'Ivoire. Soil samples were collected at each topographic unit, namely, upper slope positions, mid slope positions and bottom slope positions. Samples collected were air-dried, crushed and sieved in a 2 mm sieve preparatory to laboratory analysis. The results showed that Cambisols are the dominant soils in the study area; these are characteristic soils of reddish brown (2.5YR 4/6) to yellowish brown (10YR 4/2) at the upper and mid slope positions, and grey (10YR 5/1) at the lower slope positions. These are well drained soils whose genesis is considered to have been predominantly influenced by climate in which they occur. The profiles are weak fine granular transformation and evident changes in soil structure, color and clay content. They are dominated by sandy loam textures. Organic matter and N, available P, Exchangeable Ca, Mg contents, CEC are in the range of low to medium values. The pH values of the samples are acid (pH < 6). Fertility is low. Therefore, to perform agricultural managements in Gogbala area, decision-makers should take into soil morphological and physico-chemical characteristics consideration, suggest the need of integrated nutrient management with addition of both organic and inorganic fertilizers in the land units.
Author Keywords: Soil, characteristics, cambisols, toposequences, Côte d'Ivoire.
Volume 25, Issue 1, December 2018, Pages 437–445
Olayossimi ADECHINA1, Ouattara Amidou2, and N’Ganzoua Kouamé René3
1 Département de pédologie et Minéralogie des sols, UFR des Sciences de la Terre et des Ressources Minières, Université Félix Houphouët-Boigny, BP 582 Abidjan 22, Côte d'Ivoire
2 Département des Sciences du Sol, Université Félix Houphouêt-Boigny, UFR des Sciences de la terre et des Ressources minières, Abidjan, Côte d'Ivoire
3 Département de Pédologie, Université Jean Lorougnon Guédé, UFR Agroforesterie, Daloa, Côte d'Ivoire
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This study is focused on the soil morphological and physico-chemical characteristics of soils influenced by the topographical factor in Savanna area. It was carried out along three toposequences in Gogbala area of Korhogo Department, Northern Côte d'Ivoire. Soil samples were collected at each topographic unit, namely, upper slope positions, mid slope positions and bottom slope positions. Samples collected were air-dried, crushed and sieved in a 2 mm sieve preparatory to laboratory analysis. The results showed that Cambisols are the dominant soils in the study area; these are characteristic soils of reddish brown (2.5YR 4/6) to yellowish brown (10YR 4/2) at the upper and mid slope positions, and grey (10YR 5/1) at the lower slope positions. These are well drained soils whose genesis is considered to have been predominantly influenced by climate in which they occur. The profiles are weak fine granular transformation and evident changes in soil structure, color and clay content. They are dominated by sandy loam textures. Organic matter and N, available P, Exchangeable Ca, Mg contents, CEC are in the range of low to medium values. The pH values of the samples are acid (pH < 6). Fertility is low. Therefore, to perform agricultural managements in Gogbala area, decision-makers should take into soil morphological and physico-chemical characteristics consideration, suggest the need of integrated nutrient management with addition of both organic and inorganic fertilizers in the land units.
Author Keywords: Soil, characteristics, cambisols, toposequences, Côte d'Ivoire.
Abstract: (french)
Une étude de la caractérisation des sols a été réalisée à Gogbala, village situé au Nord de la Côte d’Ivoire en zone de savane. Trois toposéquences ont été mises en place. Sur chacune d’elles, trois fosses pédologiques ont été implantées selon les positions topographiques de haut de versant, mi-versant et bas de versant. Toutes les fosses ont été décrites et des échantillons de sols ont été prélevés au niveau de chaque horizon. Après séchage à l’air libre, ces échantillons ont été tamisés à 2mm, puis analysés en laboratoire. Il ressort de cette description et de ces analyses que tous les sols de la zone d’étude sont des cambisols. Ces sols rouges vifs ou bruns orangés en haut de versant et en mi-versant, puis gris au bas de versant, sont acides (pH < 6) et profonds avec un taux de sable élevé et un taux d’argile faible sur l’ensemble. La matière organique est plus élevée en surface qu’en profondeur au niveau des segments topographiques de haut de versant et de mi-versant. Cependant, le phénomène contraire est observé au bas de versant. Par ailleurs, la capacité d’échange cationique (CEC) est généralement normale mais la somme de bases échangeables est faible à très faible au niveau de tous les profils. Ces sols de Gogbala présentent un niveau de fertilité bas à moyen et ne peuvent assurer une production optimale des plantes en général.
Author Keywords: Sols, caractérisation, cambisols, toposéquences, Côte d’Ivoire.
How to Cite this Article
Olayossimi ADECHINA, Ouattara Amidou, and N’Ganzoua Kouamé René, “Morphological and physico-chemical properties as affected by savanna soils along toposequences in Gogbala (Northern Côte d'Ivoire),” International Journal of Innovation and Applied Studies, vol. 25, no. 1, pp. 437–445, December 2018.
