superphosphate
superphosphate or superphosphate of lime, Ca(H 2 PO 4 ) 2 , is a compound produced by treating rock phosphate with sulfuric acid or phosphoric acid, or a mixture of the two. It is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers. Ordinary superphosphate contains about 20% available phosphate; double superphosphate (also called treble superphosphate) contains 40%-50% available phosphate.
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Usuman dan Fodio
Book article from: The Columbia Encyclopedia, Sixth Edition
Usuman dan Fodio 1754-1817. Fulani religious and political leader. Beginning as an...following for his syncretic visions, establishing a base in Gudu. After Usuman successfully conducted jihād (holy war) against the king of...
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Uthman dan Fodio
Book article from: A Dictionary of World History
Uthman dan Fodio (or Usuman dan Fodio ) (1754–1817) West African religious and political leader. A Muslim Fulani, he began teaching in about 1775 among the Hausa and established the Emirates of Northern Nigeria (1804–...
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Sokoto
Book article from: The Columbia Encyclopedia, Sixth Edition
...industries. Sokoto was founded in 1809 by Usuman dan Fodio, the Fulani leader who established...the 1820s by Muhammadu Bello, dan Fodio's son. In 1903, Sokoto fell to...Frederick Lugard . The tomb of dan Fodio and other shrines in the city have...
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Sokoto Caliphate
Book article from: The Columbia Encyclopedia, Sixth Edition
Sokoto Caliphate see Usuman dan Fodio .
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Niger
Book article from: The Columbia Encyclopedia, Sixth Edition
...cent. Fulani gained control of S Niger as a result of the holy war waged against the Hausa by the Muslim reformer Usuman dan Fodio. At the Conference of Berlin (1884-85) the territory of Niger was placed within the French sphere of influence...
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