olo- 
ghly 
bio- 
iables 
ble 
gical 
tively 
ve 
id 
nd 
| JR/ 
nile 
| the 
the 
id 
paf 
  
r=0-83 
y z1:01 *2:97X 
IR/ RED 
  
À. r1 | À. 
  
  
  
1 2 3 4 
LEAF AREA INDEX ——» 
(a) 
  
rz 0.82 
y=175+0-05X 
IR/ RED— 
  
  
  
  
0 60 120 
LEAF DRY BIOMASS (gms/ nf )— 
(b) 
FIG.3 REGRESSION OF WHEAT (a) LEAF AREA INDEX 
(b) DRY BIOMASS WITH IR/RED RATIO 
1019