Physical and Chemical Properties of Soil in the Sahelian Region: Case Study in Nioro du Rip, Senegal

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Landing Biaye
Fary Diome
Seybatou Diop
Modou Mbaye
Djibril Tine
Dome Tine
Ndeye Penda Dione Diene
Gayane Faye


The locality of Nioro du Rip is facing intense erosion, loss of agricultural land, soil pollution and soil degradation. Today, there is limited information about the soil physical and chemical properties in the locality. In this work, we describe the main essential factors or mechanism that control the evolution of the soil in the study area.

The physical and chemical properties of soils encountered along a NE-SW transect in are analyzed in this paper. The statistical analysis results revealed low structural stability of soils in general, due to their low organic matter content and exchangeable bases and their predominantly silty texture. A net trend towards acidification, which is more pronounced in the lower-bottom and terrace soils, provides information on the conditions that are increasingly unfavorable to agricultural development.

The multivariate principal component analysis (PCA) identified the preponderance of two factors among the four primarily involved in soil geochemical composition. These include a mineralization process (expressed through the first principal component (PC1), which causes soils to be rich in elements (Ca2+, K+,C, N, MO) controlling their structure and fertility level;  The PC2 axis expresses the spatial differentiation phenomenon of the soil granulometric composition: soils forming cluster poles according to their textural affinity in the projection of the plane formed by these two components , with on one side the sandy-dominated soils of the shallows and terraces and on the other the clay-dominated soils of the plateau and the slope. A clear reversal of textural polarity in the studied topo sequence that must be blamed on the strong water erosion in this area.

Soil, physical and chemical, erosion, principal component analysis assessment.

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How to Cite
Biaye, L., Diome, F., Diop, S., Mbaye, M., Tine, D., Tine, D., Diene, N. P. D., & Faye, G. (2020). Physical and Chemical Properties of Soil in the Sahelian Region: Case Study in Nioro du Rip, Senegal. Journal of Geography, Environment and Earth Science International, 24(5), 73-82.
Original Research Article


Bielders L, Rajot, Jean‐Louis, Michels, Karlheinz. Wind erosion in the Niger Sahel: Influence of current farming practices and control methods. Drought. 2004;15(1):19-32.

CISSE, A. Impact of the Ravin on The Dynamics in Nioro du Rip. Memory, Cheikh Anta Diop University of Dakar; 2013.

DIOP O. Fight against runoff, gullying and salinization in Mount Rolland: Impact on the rehabilitation of Lake Tanma, Graduate Memory, 34th promotion, ENEA, Dakar, Department of Planning environment and urban management; 2008.

Betard F, Bourgeon G. Morphopedic mapping: From land assessment to geomorphology research. Geomorphology and Environment. 2009;15(3):187-198.

Teixeira V. Urban development of the middle cities of the Brazilian coast: Spatial dynamics of the municipality of Araruama in the Regio dos Lagos of the State of Rio de Janeiro. Confins. Franco-Brazilian Geography Review/Revista Franco-brasilera de geografia; 2017.

Ndiaye C. Study of the documentary system of the Institute for Research for Development (IRD): case of Representation in Senegal; 2006.

Faye E, Diatta M, Masse D. The wood and management of the Sudan fallows of the arachidier basin in Senegal. floret Ch. and Pontonier r. eds. Fallow does tropical Africa: Roles, landscaping, alternatives. 2000;20-29

Brouwers M. Morpho and hydrogeological studies in the Thyssé-Kaymor region (Siné Saloum, Senegal). CIRAD, DRM lL-PM. 1987;5:40-49.

BOGIE A, Bayala R, Diedhiou I. Temporal and Spatial Separation of Water Use Averts Competition for Soil Water Resources in a Sahelian Agroforestry System. AGUFM. 2016;H31E-1437.

Baize D, Saby N, Deslais W. Total, and pseudo-total analyses of trace elements in soils. Key results and lessons from a national collection. Soil Study and Management. 2006;13(3):181-200.

Mathieu C, Pieltain F. Chemical soil analyses (selected methods). Ed. Tec and Doc, Lavoisier. 2003;388-410.

Fall RD, Bocoum M. Local soil classification in Senegal. National Institute of Pedology editions. 2010;9-70.

Beguin M, Pumain D. The representation of geographical data: Statistics and mapping, Coll. Cursus Geography, Paris. 2000;192-200.

Touaibia B, Achite M. Contribution to mapping the specific erosion of the Oued Mina watershed in the semi-arid zone of northern Algeria. Hydrological Sciences Journal. 2003;48(2):235-242.

Zouagui Anis, Mohamed N, Mustapha P. Modelling of the risk of water erosion by the universal equation of land losses in the Western Rif: Case of the Moulay Bouchta watershed (Morocco). EUR Scientific Journal. 2018;14(3):1857-788.

Duby Camille, Robin S. Analysis in key components. National Agricultural Institute, Paris-Grignon. 2006;80-86.

Jun D, Kim Y, Hafeznezami S. Biologically induced mineralization in anaerobic membrane bioreactors: Assessment of membrane scaling mechanisms in a long-term pilot study. Journal of Membrane Science. 2017;543:342-350.

WICKHAM, Hadley. ggplot2: Elegant graphics for data analysis. Springer; 2016.