shelterwood 
noun [mass noun]
Mature trees left standing to provide shelter in which saplings can grow.There are four basic harvesting and regeneration systems: clearcut, shelterwood, seed tree, and selection.
- unpasteurised
- unpasteurized
- unpastoral
- unpasturable
- unpastured
- unpatched
- unpatented
- unpaternal
- unpathed
- unpathetic
- unpatient
- unpatiently
- unpatriarchal
- unpatriotic
- unpatriotically
- unpatriotism
- unpatrolled
- unpatroned
- unpatronising
- unpatronized
- unpatronizing
- unpatronizingly
- unpatterned
- unpauperized
- unpause