title: Biotechnology of forest yield.
abstract: Silvicultural and genetic manipulation of Douglas fir and loblolly pine plantations have increased their productivity 70 and 300 percent, respectively, over natural forests on the same sites. Yet these intensively managed plantations are achieving less than 50 percent of their potential productivity. Future increases in yield will result from optimization of nutritional treatments, control of noncrop vegetation, and advances in tree breeding and tissue culture techniques.
authors.forename: P
authors.initials: P
authors.lastname: Farnum
authors.forename: R
authors.initials: R
authors.lastname: Timmis
authors.forename: J L
authors.initials: JL
authors.lastname: Kulp