Check out the Oregon State University Bulletin EM8721: A Guide to
Multifunctional Hedgerows in Western Oregon. I wrote this in 1998 so
some of the resources are no longer available. The abbreviated Guide
describes ways to: enhance wildlife habitat; diversify farm income;
reduce soil erosion; decrease wind damage; conserve water; create
borders and privacy screens; establishment and maintenance; and plant
ideas for specific conditions and heights.