The New Encyclopædia Britannica: L-ZEncyclopædia Britannica, 1992 - 32 pages |
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Page 48
... SOILS Soil types . In general , soil types on the African con- tinent may be divided into five or six broad categories . There are desert soils ; chestnut - brown soils , which border the deserts ; and chernozem - like soils ( dark black ...
... SOILS Soil types . In general , soil types on the African con- tinent may be divided into five or six broad categories . There are desert soils ; chestnut - brown soils , which border the deserts ; and chernozem - like soils ( dark black ...
Page 49
... soils of the Accra Plains , in Ghana . Red tropical soils and laterites . The majority of tropi- cal soils have shades of colour varying from yellow and brown to red . The reddish colour reflects the presence of iron oxides that form as ...
... soils of the Accra Plains , in Ghana . Red tropical soils and laterites . The majority of tropi- cal soils have shades of colour varying from yellow and brown to red . The reddish colour reflects the presence of iron oxides that form as ...
Page 74
... soils of their headstreams , they deposit their loads of silt at the foot of the mountain ranges or else leave a long line of conical deposits locally known as dirs ( " hills " ) . Soils . Good soil is sparse at higher altitudes in the ...
... soils of their headstreams , they deposit their loads of silt at the foot of the mountain ranges or else leave a long line of conical deposits locally known as dirs ( " hills " ) . Soils . Good soil is sparse at higher altitudes in the ...
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20th century Abelian group addition aesthetic Afghanistan agriculture Albania alcohol algae algebra animals basin called central centre ceremonial climate coast common complex numbers Congo contains Côte d'Ivoire countries crops cultivation culture dance defined desert developed drinking drug East eastern economic Egypt elements equations European example farm feet field Figure finite fish forest functor Igbo important Indians integers irrigation isomorphism Kabul Kenya Lake Lake Chad Lake Victoria land language lattice Lie algebra linear major mapping miles modern mountains Niger Nigeria Nile northern operations patterns percent period Plains plants Plateau polynomial population rainfall real numbers region ring ritual River Sahara savanna social soil South Africa southern Africa species subgroup Sudan Tanzania theory tion traditional tribes tropical United valley vector space vegetation village West Africa western x₁ Yoruba Zaire Zambia Zimbabwe