THE FLORIDA STATE UNIVERSITY ARTS AND SCIENCES ...

R
Table 4.5 Comparison of actual and predicted denitrification rate values.
Actual Rdn Predicted Rdn Predicted Rdn (S) Error Error (S) % Error % Error (S)
1.30 5054.02 5.25 5052.72 3.95 -388671.14 424.70
0.30 5384.84 49.69 5384.54 49.39 -1794847.67 4869.29
24.69 5110.60 36.40 5085.91 11.72 -20600.08 3540.39
0.41 4293.28 41.37 4292.88 40.97 -1052175.58 4037.39
0.41 4981.87 49.41 4981.46 49.01 -1220945.78 4841.49
The errors for both the sets of equations are over 400 percent in spite of good r 2 values.
The errors are too large to have any significant predictive capability.
4.2.2. Texture 2 (Clay loam)
Texture two (Clay loam) is divided into two groups, the developmental group comprising
of 59 records, and the test group comprising of 18 records.
Using the information from the tables below (Table 4.6 and Table 4.7) the following
equations are developed for texture two.
R
dn
dn
= 0.26 ∗Temperature
( ° C) - 0.22 ∗ WFP (%) - 0.02
+ 1.02 ∗
- 0.11
∗
+ 6.
69
+ 0.83 ∗
+ 9.35 (R
pH - 0.02*
Soil
Depth (cm) + 3.02 ∗
2 ( R = 0.
46)
2
= 0.
45)
Nitrate
Concentration
122
∗
( μg
N g
Bulk density (gm cm
= 0.28 ∗Temperature
( ° C) - 0.21∗
WFP (%) - 0.19
pH - 0.02*
Nitrate
Concentration
∗
OC (%)
-1
soil)
- 3
)
----- Equation 4.4
-1
μ g N g soil)
----- Equation 4.5
(
OC (%)