Forests Practice Test

What timber-harvesting method involves clearing the majority of mature trees in a stand while leaving some mature trees to provide seeds to replenish the stand?

Oak is very profitable as a firewood, but oak stands take long periods of time to mature, often hundreds of years. Oak saplings aren't very shade-tolerant and soil erosion from over-logging is a very pressing issue. Oak saplings form in the immediate area to which the parent tree drops the acorns. Which of the following harvest methods would be optimal for both the hardwood ecosystem and timber yields?