Verisols

Distribution and importance of Ethiopian Vertisols and location of ascertain sites KL Srivastava, Mesfin Abebe, Abiye Astatke, Mitiku Haile and Hailu Regassa ________________________________________ debut atomic number 18a and disfigurement features Distribution Land employment Study sites Importance ________________________________________ Introduction Vertisols ar characterised by their long cracking from the surface to depths of 50 cm or more than with seasonal drying and also gilgai microrelief or sub domains showing slicker-sides or spheroid structures as evidence of seasonal expansion and condensing (Probert et al, 1987). These soils generally have a weak horizon differentiation. These soils be distributed around the 45°N latitudes, mainly in the equatorial and subtropical areas of the world. Driessen and Dudal (1989) report an estimated 311 jillion ha of Vertisols or 2.4 per cent of the world-wide land area. Vertisols occupy about 105 million ha in Africa (Blokhuis, 1982) and about 12.6 million ha in Ethiopia. Ethiopia throne broadly be divided into highlands (areas above 1500 m altitude) and lowlands (area at a lower place 1500 m altitude). The highlands cover 40% of the land hoi polloi but nib for about 95% of all gracious land, accommodating 88% of the total human population and 70% of the total stemma population. Also 90% of the economic application is concentrated in these areas (Constable, 1984). This chapter describes the distribution, use and importance of Vertisols in the rude and indicates the location of study sites of the Joint Vertisol Project (JVP). Land and soil features Parent corporals and adorn features In the central highlands of Ethiopia, the main soil parent material is olivine basalt of tertiary while. Materials of more recent age like tuffs, cinders and better ash, mainly of basic nature are also commons parent materials (Ahmad, 1983; Mitiku Haile, 1987). The largest extents of Vertisols are found on the volcanic plateaux! . Colluvial slopes and sidelopes...If you necessitate to get a full essay, enunciate it on our website: OrderCustomPaper.com

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