Skip to main content

Table 5 Student-Newman-Keuls' (SNK) Test Comparison of Chlorophyll a concentrations for Control, Nitrogen (N), Phosphorus (P), and Nitrogen plus Phosphorus (N + P), and phosphorus gradient treatments (P1–P5, representing progressively higher P concentrations) using Passive Diffusion Periphytometer in the Bosque River Watershed during the period of July 30 – August 13, 1998.

From: Measuring variability in trophic status in the Lake Waco/Bosque River Watershed

Site

Treatment

Number of Replicates

Mean Chl. a (μg cm-2)

Standard Deviation (μg cm-2)

SNK Group (α = 0.05)

NB-03

C

8

0.49

0.24

  

C

 

N

9

0.86

0.35

  

C

 

N+P

9

4.55

1.92

A

  
 

P1

7

0.67

0.17

  

C

 

P2

7

0.71

0.24

  

C

 

P3

9

0.67

0.24

  

C

 

P4

9

0.85

0.42

  

C

 

P5

9

0.79

0.19

  

C

NB-05

C

9

0.99

0.26

  

C

 

N

9

1.02

0.42

  

C

 

N+P

8

2.15

0.50

 

B

 
 

P1

9

1.08

0.34

  

C

 

P2

9

1.13

0.37

  

C

 

P3

9

1.17

0.36

  

C

 

P4

8

0.89

0.34

  

C

 

P5

9

1.99

0.59

 

B

Â