The Rooting Systems of Heath Plants

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Abstract
The rooting systems of the plants examined are classified into 3 principal types, viz. (1) shallow, spreading, with many absorbing rootlets in surface layers of soil, (2) small, little spread, few surface rootlets (3) deep, with little lateral spread (monocot. type). In communities dominated by Pteridium, on account of the better aeration of the soil, the working regions of the rooting systems lie somewhat deeper (2[long dash]15 cm.) than in communities dominated by Calluna (0[long dash]10 cm.) The peat habitat is considered to favor development of adventitious roots and all stages in reduction from a main root system (Polygala serpyllacea type) to an adventitious system developed on an extensive rhizome (Vaccinium myrtillus type) can be traced.

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