88 FORESTRY OF JAPAN. 



percent of the area of the latter consists of unwooded lands 

 while the 35 percent comprised the plantations of cleared 

 lands. 



The Imperial forests having a less area of the nude lands, 

 the general adjustment was easily completed, so that the 

 original condition of genya is retained only in the small 

 portion of the north-eastern districts of Japan. The annual 

 sylvicultural work, therefore, was limited to the regenera- 

 tion of forests after the trees are felled. Thus, the area of the 

 trees planted for the space of ten years from 1898 to 1907 

 reaches about 18,328,22 cJio. 



The method and season of forest formation vary according to 

 the sylvan conditions of the land, but generally speaking, those 

 adopted at present are as follows : 



1. The natural regeneration. 



2. Stool Shoots. 



3. The artificial showing of seeds. 



4. The planting of seedlings. 



5. Slips. 



6. The planting for sand protection. 



Of the 1st and 2nd of these are generally called the 

 natural formation of forests or " natural growth," while the 

 3rd, 4th, and 5th are comprised under the name " Artificial 

 planting." For the artificial planting, much attention must be 

 paid to the season in which the tvork is to be done. The best 



n is March and April and sometimes the work is also done 

 in October and November. 



The method of forest formation by means of the natural 

 growth has most extensively prevailed, the greater part of the 



