WHITE PINES OF JAPAN 



189 



average diameter of 16.9 cm and an average height of 13.0 m. The density 

 was 1350 trees/ha, total volume was 181.8 m 3 , and annual growth is 

 5.55 m 3 /ha. 



(9) Yamagata, Yamagata Prefecture, northern Honshu, where the 

 plantation was established in 1912 and measured several years ago (year 

 not clearly known) when it showed an average diameter of 24.4 cm and an 

 average height of 14.3 m. The density was 982 trees/ha, total volume was 

 364 m 3 /ha, and annual growth was 8.68 m 3 /ha. 



(10) Niikappu, Hokkaido, where the plantation was established in 

 1930 and measured about 1960 when it had an average diameter of 14.2 cm 

 and an average height of 8.8 m. The density was 1642 trees/ha, and total 

 volume 134 m 3 /ha and annual growth 6 m 3 /ha. 



(11) Otaru, Hokkaido, where the plantation was established in 1910 

 and measured in about 1960 when it had an average diameter of 21.1 cm and 

 an average height of 15.7 m. Density was 1273 trees/ha, total volume 

 350.5 m 3 /ha, and annual growth 7.3 m 3 /ha. 



The annual growth in these P. koraiensis plantations is about 2/3 that 

 found in P. strobus plantations. A small but successful plantation in 

 Hokkaido is shown in Figure 6. 



Figure 6. A plantation of Pinus koraiensis at the Tokyo 

 University Forest in Hokkaido. Planted in 1917. 



INTRODUCED WHITE PINES IN JAPAN 



PINUS STROBUS L. 



In 1898, P. strobus was planted at Asahikawa, Hokkaido. This 70-year- 

 old plantation is the oldest one of this species in Japan. From the outset 

 its growth was good and soon many foresters were impressed with the 



