Pruning the Top: Even if no roots are lost during planting, the top of the tree may still have such a large leaf area that frequent watering is needed to prevent wilting.
(the top of the tree; may have; such a large leaf area that frequent watering is needed; T:still) (frequent watering; is needed; to prevent wilting)
the top of the tree frequent watering
may have is needed
such a large leaf area that frequent watering is needed T:still
to prevent wilting