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undergrowth or low-branched trees.(4). Native trees and shrubs are nreferable for windbreaks To these rules it might be added that, while a single row of plants isoften desirable, it does not take care of the contingency that ariseswhen one or more plants die. It is consequently preferable to planttwo or more staggered rows of plants which thus do not require to beplanted so closely and for that reason are more likely to survive a longwhile and retain their lower branches. It is possible to gain a goodornamental effect also by combining evergreen trees with harmoniousdeciduous ones, such as hemlock or spruce with birches and maples.This type of planting is often called a "shelter belt" and when a con-siderable number of evergreen trees are used a pleasing effect is securedthe year round, and large numbers of birds will be found to be attractedand held, not only through the nesting season but sometimes all the year. |
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