agar 
  
rence $ 
  
  
  
  
  
  
  
Table 5: COMPARISON OF GROUND AND PHOTO HEIGHT MEASUREMENTS 
IN TROPICAL MIXED FORESTS OF BASTAR 
Technique No. of Mean height| Standard t 2 SE 
Observation (m) deviation (m) 
(m) 
Ground measured 294 16.2 4.1 0.47 
Photo measured 294 16.3 5.2 0.59 
Photo estimated 294 15.4 5.5 0.62 
Ground height - 
photo measured 294 70.1 5.4 0.62 
Ground height - 
photo estimated 294 70.7 4.6 0.53 
Photo measured - 
photo estimated 294 0.8 5.9 0.68 
  
Source: F.5.0./G.0.1., P.1.S9S. of F.R., central zone, 
  
  
  
1966-68