Verisols

Distribution and importance of Ethiopian Vertisols and location of reckon sites KL Srivastava, Mesfin Abebe, Abiye Astatke, Mitiku Haile and Hailu Regassa ________________________________________ accession atomic number 18a and disfigurement features Distribution Land recitation Study sites Importance ________________________________________ Introduction Vertisols ar characterised by their drawn-out cracking from the surface to depths of 50 cm or more with seasonal drying and also gilgai microrelief or sub domains showing slicker-sides or spheroid structures as evidence of seasonal expansion and compression (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(a) land area. Vertisols occupy about 105 million ha i n Africa (Blokhuis, 1982) and about 12.6 million ha in Ethiopia. Ethiopia mint broadly be divided into highlands (areas above 1500 m altitude) and lowlands (area under 1500 m altitude). The highlands cover 40% of the land hoi polloi but level for about 95% of all gracious land, accommodating 88% of the total human population and 70% of the total parentage 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 cor! porals 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 super acid parent materials (Ahmad, 1983; Mitiku Haile, 1987). The largest extents of Vertisols are found on the volcanic plateaux. Colluvial slopes and sidelopes...If you indigence to get a full essay, enunciate it on our website: OrderCustomPaper.com

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