The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 320
... LAND , OUTPUT , AND YIELDS Only a small fraction of the world's land area - less than 12 percent - may be considered arable , if arable land is defined as land planted to crops . Less than one - fourth of the world's land area is in ...
... LAND , OUTPUT , AND YIELDS Only a small fraction of the world's land area - less than 12 percent - may be considered arable , if arable land is defined as land planted to crops . Less than one - fourth of the world's land area is in ...
Page 332
... land separated from each other by a furrow , balk ( ridge of land left after plowing ) , or mere ( boundary ) , is obscure ( Figure 5 ) . The earliest examples of this system By courtesy of the R.A.F. , Crown copyright reserved Figure 5 ...
... land separated from each other by a furrow , balk ( ridge of land left after plowing ) , or mere ( boundary ) , is obscure ( Figure 5 ) . The earliest examples of this system By courtesy of the R.A.F. , Crown copyright reserved Figure 5 ...
Page 365
... land - grant col- lege system authorized in 1862 for each state tended to concentrate research in the hands of professionally trained people . The state experiment stations , which be- gan in 1887 , followed by extension services in ...
... land - grant col- lege system authorized in 1862 for each state tended to concentrate research in the hands of professionally trained people . The state experiment stations , which be- gan in 1887 , followed by extension services in ...
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accelerator acid activity Adams administrative advertising Aeschylus aesthetic Africa agriculture animals appear become body called Central century changes contains continued cost countries crops cultural dance early East effect electrons elements engineering established example farm feet field figures flight followed function human important increase industry influence Italy Khoisan Knossos known Lake land languages later less living major materials means ment natural occur operations organization original patterns percent performance period plants play political population present production range region remains represented result River society sound South southern species structure style theory tion traditional United usually variety West Western widely