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Sédogo M.p. - One of the best experts on this subject based on the ideXlab platform.
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Connaissance endogène de la classification et de la fertilité des sols en zone Sud-Soudanienne du Burkina Faso
VertigO - la revue électronique en sciences de l’environnement, 2014Co-Authors: Kissou R., Traoré E., Gnankambary Z., Nacro H.b., Sédogo M.p.Abstract:Les connaissances techniques endogènes ont été longuement ignorées ou négligées par les décideurs politiques et la recherche pour le développement. La présente étude s’inscrit dans le cadre de la valorisation de la classification et de la perception endogènes de la fertilité des sols. Elle a été menée en octobre 2012, après les récoltes, dans deux localités (Mahon et Diéri) de la province du Kénédougou, en zone sud-soudanienne du Burkina Faso, à partir d’unités de sols en suivant des toposéquences. Les toposéquences ont été choisies selon la géologie et la géomorphologie. La classification des sols a été effectuée sur le terrain par des entretiens semi-structurés en utilisant la méthode des focus groupes auprès des paysans tagba et sɛmɛ. La méthode visuelle a été utilisée par les paysans pour caractériser la topographie, la couleur, la végétation et la méthode tactile pour déterminer la texture et les éléments grossiers. La description s’est limitée à l’épipédon. Des prélèvements d’échantillons Composites de sol ont été effectués dans les 20 premiers centimètres en vue d’apprécier la perception endogène de la fertilité des sols. Les résultats ont montré que les critères de classification sont fondés sur la topographie, les caractères morphologiques des sols et la végétation. La fertilité des sols a été évaluée sur la base de la couleur et de la végétation. En dépit de quelques variations d’importance mineure relative à la qualité de certains types de sol, la perception des propriétés physico-chimiques des sols s’est avérée conforme aux résultats des analyses de laboratoire, témoignant ainsi, d’une bonne connaissance des sols par les paysans tagba et sɛmɛ et de la pertinence de leurs critères de classification.Indigenous knowledge has been neglected by policy leaders and research for development. This study was carried out in October 2012 in two localities (Mahon and Diéri) located in the Kénédougou province (Burkina Faso). The aim was to valorize indigenous Soil classification and Soil fertility perception. We studied Soil units along topographic units. The toposequences were selected according to geology and geomorphology. Soils classification was established in the field, based on semi structured interviews by using focus group method with tagba and sɛmɛ farmers. Visual method was used to describe topography, color, vegetation and tactile method was used to determine texture and coarse elements. The description was focused on the upper Soil (0-20 cm) only. Soil Composite samples were taken in the first 20 cm, to assess indigenous Soil fertility perception. We found that Soil classification criteria were based on topography and Soil morphological characteristics and vegetation. Soils fertility was assessed on the basis of color and vegetation. In spite of a few minor variations in some Soil qualities, Soil physicochemical properties perception was consistent with laboratory results, proving tagba and sɛmɛ farmers had good knowledge on Soil classification criteria
Kissou R. - One of the best experts on this subject based on the ideXlab platform.
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Connaissance endogène de la classification et de la fertilité des sols en zone Sud-Soudanienne du Burkina Faso
VertigO - la revue électronique en sciences de l’environnement, 2014Co-Authors: Kissou R., Traoré E., Gnankambary Z., Nacro H.b., Sédogo M.p.Abstract:Les connaissances techniques endogènes ont été longuement ignorées ou négligées par les décideurs politiques et la recherche pour le développement. La présente étude s’inscrit dans le cadre de la valorisation de la classification et de la perception endogènes de la fertilité des sols. Elle a été menée en octobre 2012, après les récoltes, dans deux localités (Mahon et Diéri) de la province du Kénédougou, en zone sud-soudanienne du Burkina Faso, à partir d’unités de sols en suivant des toposéquences. Les toposéquences ont été choisies selon la géologie et la géomorphologie. La classification des sols a été effectuée sur le terrain par des entretiens semi-structurés en utilisant la méthode des focus groupes auprès des paysans tagba et sɛmɛ. La méthode visuelle a été utilisée par les paysans pour caractériser la topographie, la couleur, la végétation et la méthode tactile pour déterminer la texture et les éléments grossiers. La description s’est limitée à l’épipédon. Des prélèvements d’échantillons Composites de sol ont été effectués dans les 20 premiers centimètres en vue d’apprécier la perception endogène de la fertilité des sols. Les résultats ont montré que les critères de classification sont fondés sur la topographie, les caractères morphologiques des sols et la végétation. La fertilité des sols a été évaluée sur la base de la couleur et de la végétation. En dépit de quelques variations d’importance mineure relative à la qualité de certains types de sol, la perception des propriétés physico-chimiques des sols s’est avérée conforme aux résultats des analyses de laboratoire, témoignant ainsi, d’une bonne connaissance des sols par les paysans tagba et sɛmɛ et de la pertinence de leurs critères de classification.Indigenous knowledge has been neglected by policy leaders and research for development. This study was carried out in October 2012 in two localities (Mahon and Diéri) located in the Kénédougou province (Burkina Faso). The aim was to valorize indigenous Soil classification and Soil fertility perception. We studied Soil units along topographic units. The toposequences were selected according to geology and geomorphology. Soils classification was established in the field, based on semi structured interviews by using focus group method with tagba and sɛmɛ farmers. Visual method was used to describe topography, color, vegetation and tactile method was used to determine texture and coarse elements. The description was focused on the upper Soil (0-20 cm) only. Soil Composite samples were taken in the first 20 cm, to assess indigenous Soil fertility perception. We found that Soil classification criteria were based on topography and Soil morphological characteristics and vegetation. Soils fertility was assessed on the basis of color and vegetation. In spite of a few minor variations in some Soil qualities, Soil physicochemical properties perception was consistent with laboratory results, proving tagba and sɛmɛ farmers had good knowledge on Soil classification criteria
M.p. Sédogo - One of the best experts on this subject based on the ideXlab platform.
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Connaissance endogène de la classification et de la fertilité des sols en zone Sud-Soudanienne du Burkina Faso
Éditions en environnement VertigO, 2014Co-Authors: R. Kissou, E. Traoré, Z. Gnankambary, H.b. Nacro, M.p. SédogoAbstract:Indigenous knowledge has been neglected by policy leaders and research for development. This study was carried out in October 2012 in two localities (Mahon and Diéri) located in the Kénédougou province (Burkina Faso). The aim was to valorize indigenous Soil classification and Soil fertility perception. We studied Soil units along topographic units. The toposequences were selected according to geology and geomorphology. Soils classification was established in the field, based on semi structured interviews by using focus group method with tagba and sɛmɛ farmers. Visual method was used to describe topography, color, vegetation and tactile method was used to determine texture and coarse elements. The description was focused on the upper Soil (0-20 cm) only. Soil Composite samples were taken in the first 20 cm, to assess indigenous Soil fertility perception. We found that Soil classification criteria were based on topography and Soil morphological characteristics and vegetation. Soils fertility was assessed on the basis of color and vegetation. In spite of a few minor variations in some Soil qualities, Soil physicochemical properties perception was consistent with laboratory results, proving tagba and sɛmɛ farmers had good knowledge on Soil classification criteria
D Curcio - One of the best experts on this subject based on the ideXlab platform.
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hydro mechanical behavior of a lateritic fiber Soil Composite as a waste containment liner
Geotextiles and Geomembranes, 2019Co-Authors: Mauricio Ehrlich, Marcio De Souza Soares De Almeida, D CurcioAbstract:Abstract In waste disposal landfill projects, the hydraulic conductivity of the barriers is a major consideration. The use of fibers mixed with backfill may improve the overall performance of the barriers. Fiber-Soil Composites show a more resistant and ductile behavior than the Soil alone. The presence of fibers may reduce cracking problems related to shrinkage or traction in liners or covers. In this study, laboratory tests were performed to evaluate the use of fiber-Soil Composites as a containing barrier. Hydraulic conductivity and diametral-compression tests were carried out on PET fiber reinforced and unreinforced compacted Soil specimens. The tests were conducted under confinement conditions similar to those found in the field. Diametral-compression tests were used to induce cracks in the specimens. Hydraulic conductivity was measured at different stages during the diametral loading. In the tests performed under low confinement pressure (10 kPa), the crack openings led to a significant increase in hydraulic conductivity. The results showed that the addition of fibers increases the tensile strength of the Soil-fiber mass and delays the opening of cracks. Moreover, in the tests under high confinement pressure (100 kPa), a decrease in hydraulic conductivity occurred at all stages of the diametral load application.
Zhisheng Dai - One of the best experts on this subject based on the ideXlab platform.
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effect of root architecture on rainfall threshold for slope stability variabilities in saturated hydraulic conductivity and strength of root Soil Composite
Landslides, 2020Co-Authors: Xinhao Wang, Yunqi Wang, Yujie Wang, Zhisheng DaiAbstract:Plant roots positively and negatively contribute to hillslope stability by the perspective of Soil strength and water flow infiltration improvement. To further examine the controversy, this work addresses the six root architecture types on the rainfall threshold for slope stability by tests of saturated conductivity and shear strength of the root-Soil Composite. An infinite slope model and a 1D flow model combine to obtain the rainfall intensity-duration threshold of slope failure. The results reveal that the saturated hydraulic conductivity of root-Soil Composite is 1 to 4.23 times of bare Soil, which increases as the length density, volume density, and volume fractal dimension of plant roots. Furthermore, plant roots can enhance the cohesion and angle of internal friction by 35.19–81.79% and 12.92–42.36%, respectively. Finally, the R-type and V-type roots have the most effective root architecture for hillslope stability. In the process of afforestation, H-type may be suitable for areas with soft slope, while V-type and R-type may be suitable for steep slopes. The results of this work present an interesting study on the interaction of plant roots on slope stability, which is worthy of further study in the future.