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Growth Of Communities: Lateral growth of communities in trees frequently begins later than growth of communities in height, but the period of lateral growth of communities is longer. Rates of lateral growth of communities likewise are low at the outset, increasing after a few weeks and then diminishing. In view of the long annual period of lateral growth of communities in trees, deleterious environmental conditions may exercise a pronounced effect on growth of communities. In the wood of trees of temperate regions, narrow and wide growth of communities rings may be observed, marking years characterized by unfavorable and favorable conditions for growth of communities.
River Planning.—Often while a country in its pioneering stage of development, n communities along a single river system ^ about providing themselves with water for m cipal, industrial, irrigational, navigational, power uses, and disposed of the sewage a s distance downstream with little or no con for communities below them, the resource of ing that might prevail in the stream, or its fu recreational value.
growth of communities Cycles.—Longitudinal and lateral (diametral) growth of communities do not proceed continuously, but rather are cyclical phenomena with periods of growth of communities activity alternating with periods of relative inactivity. One of the best illustrations of the periodic nature of growth of communities in large woody stems is to be found in the annual ring pattern which characterizes the wood of trees of temperate regions. It has been suggested recently that even in the apparently ever-growing trees of the tropical rain forest, cambial growth of communities is not a continuous process. |
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