Table 3.  Area of timberland by forest-type group and stand-size  
                        class, Pennsylvania, 2002 
  
                        (Standard error as percentage of total) 
   _________________________________________________________________________________ 
                                       Stand-size class                               
     Forest-type        _______________________________________________       All      
         group              Saw-        Pole-   Sapling and     Non-        classes   
                           timber      timber     seedling     stocked                
   _________________________________________________________________________________ 
   White/red pine              13.3        27.0        37.6       100.0        11.3  
   Spruce/fir                  73.4        39.2        71.3          .0        31.9  
   Loblolly/shortleaf          33.1        47.1        86.5          .0        25.8  
   Oak/pine                    29.2        51.2        82.8          .0        24.3  
   Oak/hickory                  3.8         5.6        13.6        63.0         2.6  
   Elm/ash/red maple           14.2        19.2        22.9        64.2        10.0  
   Northern hardwoods           4.2         6.3         9.5        31.5         2.8  
   Aspen/birch                 49.9        25.8        21.4        73.1        15.3  
                        ____________________________________________________________ 
   Total, all groups            2.1         3.7         6.6        25.8         1.0  
   _________________________________________________________________________________