The Density of Douglas Firs in an Old- Growth Forest

question 2

Multiple Choice

The density of Douglas firs in an old- growth forest is estimated by counting the Douglas firs in four sample plots of 1 hectare each.The number of fir trees in the plots is 10,12,7,and 11,respectively.What is the estimated density of firs in the forest?

• A)20 trees per hectare
• B)10 trees per hectare
• C)25 trees per hectare
• D)5 trees per hectare

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