1042 



JOURNAL OF FOKKSTKV 



trees whenever this is possible. A mixed forest of Scotch larch and 

 Baltic pine or birch is especially recommended. Admixture with spruce 

 should be avoided or only attempted with spruce as an understory. 

 Only seed from Scotch or Silesiah larch, which can be conveniently 

 obtained in Sweden from existing stands, should be planted. 



Larch should be thinned early and heavily. The first thinning should 

 release the crowns and remove the suppressed trees, followed by heavy 

 "low thinnings." removing the suppressed trees with bushy crowns, 



Fig. I. — Map of the Approximate Distribution of the Larch Species 



I, L. occidentalis; 2, L. lyalli; 3, L. chinensis : 4, L. griffithii; 5, L. potanini; 6, L. leptolepis; 

 7, L. europecc; 8, L. europew X leptolepis (odlad i England); 9, L. polonica; 10, L. sibirica; 

 II, L. principis rupprechtii; 12, L. dahurica; 13, L. dahurica X sibirica; 14, L. olgensis; 15, 

 L. kurilensis; 16, L. cajandcri; 17, L. alaskensis; 18, L. americana; 19, L. americana X 

 europew (odlad i England). 



especially if an understory exists. This enables* the stand to resist 

 "cancer" more effectively. To avoid attacks of this fungus, it is even 

 advisable to prune 20 to 30 year old stands. 



The timber produced by Larix europece is valuable for house con- 

 struction, telephone and telegraph poles, mine props, etc., and in contact 

 with the soil is much more durable than Baltic pine. 



Larix sibcrica is recommended for planting in the north and central 

 parts of Sweden. Like Scotch larch, the boles are tall and straight. It 

 is attacked by "cancer" in much the same degree as Scotch larch, and 

 hence the same management is prescribed for this species. The wood 

 exhibits the same characteristics as Scotch larch. 



