i 
i 
  
  
  
  
  
  
  
  
  
  
  
  
ç values were 
>ssion models 
| presented in 
jon was given 
ing the trend 
ss of best fit 
the harmony 
ows that the 
rvesting stage 
SION 
e 3 shows the 
NDVIToar for 
iship between 
s is shown in 
ric correction 
esults of the 
1dsat 5 TM. 
Or corn crop 
  
  
  
For comparison, Figure 6 shows the regression model 
between the grounds measured NDVI (NDVI) and the 
ground measured values for LAI (LAI) for the corn crop 
in the CIA. It is interesting to note that this regression 
relationship is not as good as either the MLS derived 
NDVI or US derived NDVI or NDVI derived from raw 
uncorrected reflectance at the top of the atmosphere. 
Analysis shows strong correlations and the coefficient of 
   
determination (R?) for corn for four different correlations 
(LAIc - NDVIg , LAlG - NDVIz,4 , LAlG — NDVlyrs 
and LAIg — NDVIys) Were found to be 0.81, 0.83 , 0.89 
and 0.88, respectively. 
In a similar way, these relationships were developed for 
wheat crop and results are shown in Figures 7, 8, 9 and 
10. 
  
1.00 
0.90 
0.80 
0.70 
0.60 
0.50 
0.40 
0.30 
0.20 
0.10 
0.00 
NDVI us 
  
  
  
0.95 
0.9 
0.85 
© 08 
2 0.75 
2 07 
   
  
=0.1373In(x) + 0.7321 
0.65 
2 
0.6 
0.55 
0.5 
0 i 2 3 4 5 6 
LAl c 
  
  
Figure 5: Relationship of LAIG and NDVIys for corn crop 
Figure 6: Relationship of LAIG and NDVI; for corn crop 
  
z 0.78In(x) - 0.1912 
2 
  
1 1.5 2 2.5 3 3.5 4 4.5 
LAI 
  
  
  
  
LAI 
  
Figure 7: Relationship of LAL; and NDVI, for wheat 
Figure 8: Relationship of LAL and NDVI for wheat 
  
  
  
  
  
  
  
  
  
  
Crop Crop 
120 1.00 
0.90 
95 - : 0.80 
0.80 - «99, $8 0.70 
; $ se se € 4 0.60 
S 060 $ + 2 adh 
2 0.40 ta zw 
ex — 0.30 
020 - à t y =0.8195In(x)- 0.1539 0.20 
T : R*= 0.7173 0.10 
0.00 ; ; : 0.00 
0 1 2 3 4 5 0 1 2 3 4 5 
LAlg LAlc 
  
  
  
  
  
Figure 9: Relationship of LAIG and NDVIy s for wheat crop 
Figure 10: Relationship of LAIG and NDVlIyg for wheat crop