Chemistry 101 



TABLE 4-8 Average Concentrations of Various Forms of Nitrogen in the 

 Water of Barrow Ponds* 



*Data expressed asjUg N liter- 



4. 



70 

 60 

 50 

 40 

 30 

 20 

 10 



-I — ' 1 <- 



/,N03-N 



10 20 

 Jun 



-—---* ■ 



FIGURE 4-12. Concentrations of nitrate and am- 

 monia in Pond B, 1971. 



