Environmental Science 14th Edition by Tyler Miller ,Scott Spoolman

Exercise 12

Consider the graph below that shows loss of calcium from the experimental cutover site of the Hubbard Brook Experimental Forest compared with that of the control site. Note that this figure is very similar to Figure 2-4, which compares loss of nitrates from the two sites. After studying this graph answer the questions below.

In what year did the calcium loss from the experimental site begin a sharp increase In what year did it peak In what year did it again level off