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pine tree roots system

Posted by David Crombie , Aug 04,2004,19:29       Forum

We have a villa in the Algarve, Portugal. One side of the driveway is lined by mature pine trees. The driveway is paved in calcada, which is a bit like cobble stones only they are smaller. Over the last few years the driveway has become progressively more uneven with quite significaant bumps which makes it very uncomfortable to drive up and down.
At what depth below the surface do the major roots of a pine tree fan out, is it likely that they could be the cause? I always thought that pine trees had 'ball' roots rather than 'spreading' roots such as an oak tree has.
Any suggestions would be welcome as in time the driveway will become unusable and I don't want to loose the pine trees.
Many thanks.

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