60 THE TREE AND ITS CHARACTERISTICS 



Although all the above methods may be used in regenerating the 

 forest, a very large percentage is accomplished by seed. Trees gen- 

 erally reproduce themselves by natural processes, that is, by seeds 

 germinating in the soil after falling from the parent tree. Many mil- 

 lions of seeds are produced for relatively few trees which may result 

 from them. Seed is collected in enormous quantities for artificial 

 reproduction, generally known as tree planting or reforestation. 



