Being below ground the root system escapes genera! atlention but in fact it is at least as extensive as the aerial system we see above soil level. Broadly there are two types of root systems. Some trees have a stout tap root which penetrates deeply into the soil, whereas others have a fasciculate system of several main roots which grow obliquely downwards. However, intermediate types are common and although some trees are typically shallow-rooted and others deep-rooted the depth of penetration is often affected by the nature of the soil.
The main roots provide a firm anchor for the heavy aerial system. The young roots grow apically and a
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