PLATE I 



The Migration Chart shows the area divided into units having similar factors 

 influencing reproduction. These areas are designated by the letters of the alphabet. 

 A letter appearing on two or three areas indicates that these areas are similar. 



Areas A, B, C, and D are all within seed plots under about 50 per cent shade 

 with sparse annuals and ground cover of duff, humus, and litter. The seed trees in 

 the plots are healthy except in C and in the edge of D where they have been badly 

 damaged by fire. 



E is an area of unburned, partially piled slash on a steep north slope of 20 to 40 

 per cent, with scattered small trees of hemlock and cedar. The ground cover is of 

 sparse annuals and patches of duff, humus, and litter. 



F is an area of unburned, partially piled slash on a southeast slope of 15 to 20 

 per cent. The ground cover consists of scattered annuals, and a large per cent of 

 the soil is covered with litter and duff. Scattered trees of hemlock and small cedar 

 were left standing on this area. 



G is practically level. The greater portion of it is unburned slash, partially 

 piled, and the northern part of it has a pole stand of grand fir and cedar. The ground 

 cover consists of a few annuals and litter and duff with some exposed places of mineral 

 soil. 



H is a south and west slope of 10 to 40 per cent, and is a very dry and hot situa- 

 tion. The north half of this area is covered with slash, piled but unburned. The 

 ground is covered with scattering annuals and tufts of grass, except along the West 

 Branch River where there is a heavy cover as previously described. 



J is the general broadcast burned area of flat benches and slopes. The ground 

 cover is described in the general description. 



