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
Natural enemies should be fostered as much as possible, and the use of
selective pesticides, when available, is an ... Food for natural aging enemies has
been provided, in some cases, by maintaining natural an acceptable population
level of ...
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