Exam 28: Population Growth, resource Use, and Sustainability

As biomass in a forest increases,the density of trees decreases,while the average tree size increases as a result of self-thinning.

Which of the following is an example of a nonrenewable resource?

The concept of sustained yield applies to nonrenewable resources.

Industrialized agriculture produces large quantities of crops and takes little energy input to do so.

The maximum sustainable yield of a fishery occurs at a population level that is

A community that consists of a mixture of crop species is called a(n)________.

The silvicultural technique in which mature single trees or groups of trees scattered through the forest are removed is referred to as

When trees are harvested and removed,

The negative consequences of harvesting a natural resource,such as the soil erosion and sedimentation of a river that occur after a forest is logged,typically are not included in the market price of the resource; these costs are referred to as

The strategy of harvesting a resource at a rate equal to the rate at which it is renewed is referred to as the maximum ________ yield.

Using benefit-cost analysis,if it costs a farmer $150/ha to plant soybeans,he or she should definitely plant the crop if projected benefits are

In some parts of our national forests,forest managers are mandated by the government to sell timber at prices that do not meet the costs of management and harvest.

________ -cutting is the complete removal of a forest during harvest.

In forest harvest,the time between harvests is called the ________ period,or harvest interval.