PLANTING. 71 



5. Season for planting. 



6. Density of planting. 



7. Distribution of plants over area. 



8. Number of plants per unit of area. 



9. Lifting plants. 



10. Pruning. 



11. Protection in transit. 



12. Preparation of the soil. 



1. Choice of Species. 



Eeference is invited to what has been said in Chapter I., 

 Section I. of this volume. In addition, it remains to be 

 mentioned, that planting Vs admissible in the case of all 

 species, and that it is specially adapted for those which 

 are tender during early youth, and which cannot receive 

 sufficient attention and protection in direct sowings on a 

 large scale ; also to species, the seed of which is expen- 

 sive, or exposed to dangers from animals. 



2. Different Kinds of Plants. 



The plants used in Sylviculture are of many kinds, 

 according to external form, origin, age, &c. No general 

 classification is possible, since the various groups over- 

 lap each other. For practical purposes the following 

 divisions will prove useful : 



A distinction must, in the first place, be made between 

 plants which have sprung directly from seed, and those 

 which formed part of an already existing individual ; 

 hence the division into : 

 (1.) Seedling plants, 

 (2.) Suckers, layers, or cuttings. 



