PRIMER OF PRIMERS. 205 



planting of the tree is, perhaps, preferable, since 

 the germination and continued growth of seeds 

 are by no means certain. 



Where the destruction of the forest has been 

 caused by an avalanche, the removal of the soil, 

 in some cases, is so complete that trees cannot be 

 successfully replanted. 



In some of the western parts of the United 

 States it is now recognized, from actual experience, 

 that when trees are planted in plots around the 

 farm-lands, the protection thus afforded the rest 

 of the farm-land, against the winds, is of greater 

 money-value than the rent of the ground occupied 

 by such trees. 



The following locations are especially adapted to 

 tree planting : 



1. "Wetlands. 



2. Lands covered with a thin or poor soil. 



3. Along the margins of rivers where the land 

 is not required for roads or other public pur- 

 poses. 



4. On the side of mountain-slopes where the soil 

 is of the proper character, or subject to destructive 

 avalanches. 



An exact balance must be preserved between 

 the five great geographical forms, namely, the 



18 



