( ( ( ( ( ( ( ( Mature trees ) ( ( are ( less ( tolerant ( of ( root pruning ) ) ) ) ) ( than ( young trees ) ) ) ) , ) ( ( trees ( on ( sites ( exposed ( to ( high winds ) ) ) ) ) ) ( are ( less ( tolerant ( than ( sheltered trees ) ) ) ) ) ) ) , ) and ) ( ( trees ( with ( ( defects or ) ( poor ( general health ) ) ) ) ) ( ( are not ) ( ( good candidates ) ( for ( root pruning ) ) ) ) ) ) . )
(ROOT (S (S (NP (JJ Mature) (NNS trees)) (VP (VBP are) (ADJP (RBR less) (JJ tolerant) (PP (IN of) (NP (NN root) (NN pruning)))) (PP (IN than) (NP (JJ young) (NNS trees))))) (, ,) (S (NP (NP (NNS trees)) (PP (IN on) (NP (NP (NNS sites)) (VP (VBN exposed) (PP (TO to) (NP (JJ high) (NNS winds))))))) (VP (VBP are) (ADJP (RBR less) (JJ tolerant) (PP (IN than) (NP (JJ sheltered) (NNS trees)))))) (, ,) (CC and) (S (NP (NP (NNS trees)) (PP (IN with) (NP (NP (NNS defects)) (CC or) (NP (JJ poor) (JJ general) (NN health))))) (VP (VBP are) (RB not) (NP (NP (JJ good) (NNS candidates)) (PP (IN for) (NP (NN root) (NN pruning)))))) (. .)))
Mature trees are less tolerant of root pruning than young trees, trees on sites exposed to high winds are less tolerant than sheltered trees, and trees with defects or poor general health are not good candidates for root pruning.
(ROOT (S (NP (JJ Deep) (NNS roots)) (VP (MD will) (ADVP (RBS best)) (VP (VB prevent) (NP (DT a) (NN tree)) (PP (IN from) (S (VP (VBG being) (VP (VBN blown) (PRT (RP over)) (PP (IN by) (NP (JJ high) (NNS winds))) (PP (IN during) (NP (DT a) (NN storm))))))))) (. .)))
Deep roots will best prevent a tree from being blown over by high winds during a storm.