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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in botany, the repeated use by a plant of the mineral substances absorbed by the roots. The substances in the plant are constantly being redistributed, moving from organs whose growth is completed to young organs, where they are assimilated again. The reutilization of mineral substances stored in the leaves is particularly intense during fruit and seed ripening. Toward autumn the mineral substances in perennial deciduous plants move from the leaves to the stems and roots; in the spring these substances make possible the growth of the young shoots.

The ability of a plant to reutilize an element is detected by excluding one of the elements from the nutrient mixture. The oldest leaves are harmed first if there is a deficiency of nitrogen, phosphorous, potassium, or magnesium—which are highly capable of being reutilized. A deficiency of calcium, boron, iron, sulfur, or manganese—which are hardly reutilized at all—harms newly forming young organs.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Auger, M.D., of the Cincinnati Children's Hospital Medical Center, and colleagues assessed the effects of a post-discharge telephone call on reutilization events for pediatric urgent health care services.
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An important component of its mission is the reutilization of excess equipment within the military services to prevent wasteful purchases within the Department of Defense.
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The utilization of coal fly ash (FA) as a soil amendment is one of the most intensively studied FA reutilization option.
The MBDC Silver Cradle to Cradle certification is granted to products that meet sustainable standards in the areas of material health, material reutilization, renewable energy use, water stewardship and social responsibility.
SHIFT's database driven architecture also makes content reutilization, localization and subsequent changes simple.
Items not serviceable will go for repairs or to the Defense Reutilization and Marketing Office.
Used items will not be taxed, which promotes reutilization. Business-to-business purchases for the production of goods and services will not be taxed.