10 
IRRIGATED 
— — = UN IRRIGATED 
  
IR/ RED —= 
o 
v 
  
  
  
20 40 60 80 100 120 140 
DAYS AFTER SOWING ——» 
  
  
   
   
T 
0:8 
  
IRRIGATED 
——=— UN IRRIGATED 
  
  
20 20 do 80 100 120 140 
DAYS AFTER. SOWING ——» 
FiG.2 TEMPORAL VARIATION OF (a) IR/RED (b) NORMALIZED 
DIFFERENCE FOR WHEAT CROP 
1017