188 



HARUYOSHI SAHO 



P. koraiensis grows to 30 m in height and 1.5 m in diameter, but it 

 does not occur in extensive, pure stands (Fig. 5). Therefore, it is 

 difficult to calculate the total volume per hectare of this species. The 

 average annual diameter growth is about 4 to 5 mm. This species repro- 

 duces and grows well under the moderate shade. 



v2 nto*-.^ 



Figure 5. Two large 

 specimens of Pinus 

 koraiensis growing in 

 a mixed stand on Mt . 

 On-take in central 

 Honshu (.by the courtesy 

 of Mr. H. Chimura) . 





-ft 



There are several localities where plantations have been established 

 in Japan. Notable plantations can be found at: 



(6) Asakawa Experiment Forest, Tokyo, Honshu. One plantation was 

 established in 1930, and measured in 1960. At that time, the average 

 diameter was 14 cm (max. 22 cm) and the average height was 10 m (max. 

 16 m) . Another plantation of 1935 origin had an average diameter of 



12 cm (max. 20 cm) and height of 12 m (max. 16 m) . 



(7) Tokyo University Forest in Chiba, in east-central Honshu, where 

 the plantation was established in 1930 and measured in 1960. Vlhen measured 

 it had an average diameter of 18.3 cm and an average height of 9.0 m. 



(8) Kemuriyama, Iwate Prefecture, northern Honshu, where one of the 

 plantations that was planted in 1930 and measured in 1956 showed an 



