MODIFICATIONS OF THE METHOD 53 



ber of reserve seed trees may vary depending upon whether 

 emphasis is placed on the development of the stand or on the 

 timber to be secured eventually from the seed trees. If the 



Gropp Seed-tree Method Scattered Seed-tree Method 



Fig. 15. 



A comparison of the group and scattered seed tree methods where the same 

 number of trees (and volume) are left in the stand under each of the methods. 

 It is evident that dissemination of seed cannot be so uniform where the seed 

 trees are arranged in groups as when distributed singly. The shaded areas 

 indicate the portions of the tract occupied by the crowns of the seed trees. 



new stand is to develop properly the reserve seed trees must 

 be relatively few. If production of large timber is of primary 



