To understand ecosystem processes, long-term investigations of hydrology, soils, and forest communities are conducted in experimental forests and watersheds maintained by the Forest Service and cooperators.
(long-term investigations of hydrology, soils, and forest communities; are conducted; L:in experimental forests and watersheds) (experimental forests and watersheds; maintained; by the Forest Service and cooperators)
long-term investigations of hydrology, soils, and forest communities experimental forests and watersheds
are conducted maintained
L:in experimental forests and watersheds
by the Forest Service and cooperators