REPORT OF THE SWEDISH INSTITUTE OF EXPERIMENTAL FORESTRY. 



Summary of the programme of the Swedish State Institute 

 of Experimental Forestry for the period 1922 — 26. 



(Swedish text pp. 66 — 7°)- 



The following programme has been confirmed by the board of directors 

 April 2 8th 1922. 



The investigations to be carried out by the Forest section are marked out 

 with the letter S, N indicates the Botanical section, and E the Entomological 

 section. The letter F indicates that the problems in question until further 

 notice are to be studied by the supplementary section for regeneration experi- 

 ments in Norrland. 



1. The Problem of Forest Regeneration. 



a) Seed T?westigatioTis etc. 



Continued investigations. 



Records of the seed production of forest trees (S); investigations on seed 

 of pine and spruce collected in different parts of Norrland, the results being 

 published connected with meteorological reports (F); a method of analyzing 

 microscopically the seeds (F); publication of the results of investigations on 

 the biology of germination of the most important forest trees (N); collection 

 of the total quantity of cones from certain trees, and investigations on the 

 quality of the seed (F); revision and publication of pine and spruce cultiva- 

 tion experiments in order to state the influence caused by different origin of 

 the seed (S); completion of experiment series already laid out on different 

 heights above sea-level for studying the importance of the local climatic 

 conditions for forest cultural operations (F). 



New investigations. 



Ascertainment of the most suitable time for gathering cones (F); investiga- 

 tions on the cone production of seed trees, especially on the research do- 

 mains (S); studies on cultivation of oak, beech and ålder in cooperation with 

 other Scandinavian institutes of experimental forestry in order to ascertain the 

 importance of different origin (S); experiments of cultivation of Swedish 

 northern pine in the southern parts of the country (S); cultivation on different 

 heights above sea-level with seed from different districts on the research do- 

 main of Siljansfors, in connection with meteorological observations (S). 



b) Special measures for securiiig natural forest regeneration. 



Continued investigations. 



Revision and publication of the experiments with clearings and gaps of 

 different size and with cutting according to Wagners' system (S); studies of 

 the scattering of the seeds on clearings of different size (F); soil treatment 

 experiments with subsequent sowing of pine seed in acid humus types of spruce 

 forest (F); investigations on the effect on the humus-covering of the ground of 

 re-forestation measures (N); the regeneration problem of the northern pine 

 heaths (N). 



