The New Encyclopædia BritannicaEncyclopaedia Britannica, Incorporated, 1987 - Encyclopedias and dictionaries |
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Page 201
... developed in the Great Plains of the United States early in the 20th century . It depended on the efficient storage of the lim- ited moisture in the soil and the selection of crops and growing methods that made best use of this moisture ...
... developed in the Great Plains of the United States early in the 20th century . It depended on the efficient storage of the lim- ited moisture in the soil and the selection of crops and growing methods that made best use of this moisture ...
Page 202
... developed to meet the needs of varying climates , growing seasons , soils , and other factors . The large hybrid seed - corn companies undertook complex applied - research programs , while state experiment stations and the U.S. ...
... developed to meet the needs of varying climates , growing seasons , soils , and other factors . The large hybrid seed - corn companies undertook complex applied - research programs , while state experiment stations and the U.S. ...
Page 203
... developed in the United States in the latter part of the 19th and first part of the 20th century were heavy , fat - producing animals that met the demands for lard . During the 1920s lard became less important as a source of fat because ...
... developed in the United States in the latter part of the 19th and first part of the 20th century were heavy , fat - producing animals that met the demands for lard . During the 1920s lard became less important as a source of fat because ...
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20th century Abelian group addition adhesives Afghanistan agricultural Albanian alcohol algebra animal associated Bantu Basin British called carved cement central centre ceremonial climate coast colonial common complex numbers Congo contains countries crops cultivation culture dance defined desert developed drinking drug East eastern economic Egypt elements equations European example farm feet field figures finite fish forest functor Ghana important Indians integers irrigation isomorphism Kenya Lake Lake Victoria land lattice Lie algebra linear major mapping masks miles modern mountains Mozambique multiplication Niger Niger River Nigeria Nile northern operations patterns percent period Plains plant Plateau polynomial population rainfall real numbers region ring river Sahara savanna sculpture social society soil South Africa southern subgroup Sudan theory tion trade traditional tribes United Valley vector space vegetation village West Africa western Yoruba Zaire Zimbabwe