The New Encyclopaedia Britannica
Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries - 934 pages
 Propaedia: outline of knowledge and guide to the Britannica.--- Micropaedia: ready reference and index.--- Macropaedia: knowledge in depth.
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Through the normal genetic processes of breeding and selection, man has been
able to modify many natural varieties of plants and animals to produce
characteristics that he desires — quality of produce, quantity of yield, time of
Unfortunately, pesticides are not very selective, physiologically, among the
arthropods, for they usually kill broad groups of organisms — including many
species of natural enemies, which are generally more susceptible to pesticides
than the ...
This means that the natural "growth" of soil thickness ranges from one to ten
millimetres per year. It shows that under the conditions of natural denudation, a
well-regulated dynamic system exists. The three basic processes of the system ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review