The pine trees needles turn sickly and fell on the ground.? There are several pine trees in the rear yard, the needles...

There are several pine trees in the rear yard, the needles turn pale and some of them feel on the ground.

Anybody know any remedy to save these trees.
Answers:    Near the back of the summer, white pine and other long needle pines will shed the previous years needles. This is unconscious. Not sure about short syringe pines.
are they getting enough marine? if your area have not had precipitation, you need to sea them, make sure the sea runs long enough for it to soak surrounded by deep. you can also nurture them, use a granular type garden fertilizer and ironite. sprinkle it all around the drip chain of the tree [ as far out as the branches reach] feed 4x year and marine weekly.