Water Utilization by Trees, With Special Reference to the Economic Forest Species of the North Temperate Zone (Classic Reprint) - Softcover

Oran Raber

Softcover

ISBN 10: 0265345006 ISBN 13: 9780265345009

Publisher: Forgotten Books, 2018

Synopsis

Excerpt from Water Utilization by Trees, With Special Reference to the Economic Forest Species of the North Temperate Zone

Water is absorbed to a small extent by leaves and twigs but chiefly by the roots. The amount which they absorb depends not only upon the physicochemical nature of the soil and its moisture content but also upon inherent specific differences between plants and upon the biotic environment. This latter includes not only roots from other members Of the same species but also those of the other species of plants in the same soil. In addition the role of micro-organisms and of mycorhiza must be considered. Although much yet needs to be done in determining the manner in which trees check transpiration, the role of roots in supplying water should not be overlooked. Under what conditions do the deep-lying roots function in supplying water and how effective are they?

While the broad outlines of these problems have been well under. Stood for some time, we have little data Of an intensive nature. In just what regions of the soil are the absorbing roots Of the various species? Which layers Of the soil are the most important for the water supply of individual species, and what adaptations are possible in the various tree species which will permit them to accommodate themselves to a changing soil-moisture content or to a falling ground water level? TO just what extent can environment change the genetic pattern Of root systems, and to what degree is the inherited tendency of a species to form a taproot influenced by root mutilations, such as occur in transplanting nursery and other planting stock? Also what is the optimum spacing (density of stand) for the various Soil - moisture conditions? And to what extent are range grasses. And other minor vegetation such as Chaparral and brush species compatible with trees and forests? In answering satisfactorily all these questions, much work still remains to be done.

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Edition details

• Publisher: Forgotten Books
• Publication date: 2018
• Language: English
• ISBN 10: 0265345006
• ISBN 13: 9780265345009
• Binding: Paperback
• Number of pages: 105