Analysis of Iowa's Forest Resources, 1990

摘要

The third Iowa forest inventory found 2.1 million acres of forest land in 1990,of which 1.9 million acres is timberland. Growing-stock volume on timberland increased from 1.1 to 1.7 billion cubic feet between 1974 and 1990, a gain of 46 percent. The document presents analysis and statistics on forest area, timber volume, growth, removals, mortality, and projections.