REPORT OF THE SWEDISH INSTITUTE OF EXPERIMENTAL FORESTRY. 



v. Program for the triennial period 1915 — 17 arranged by the 

 State Institute of Experimental Forestry. 



After such discussion as is prescribed in §15 of the royal instructions to 

 the State Institute of Experimental Forestry, had taken place on 12 and 13 

 April — at which meeting there were present, in addition to all the members of the 

 governing Council and the professors at the Experimental Institute and at the 

 High School of Forestry, the following specially summoned experts, viz. ex- 

 Captain B. A. de Verdier, manager, And. Holmgren, royal forester, and G. 

 KuYLENSTiERNA, manager — the Council of the High School of Forestry and 

 of the Experimental Institute at the meeting held this day has sanctioned the 

 following program of the Experimental Institute to follow during the years 

 191 5 — 17, but with the right for the Experimental Institute to carry out 

 minor investigations not here laid down, so far as time permits: — 



I. The Question of Regrowth. 



(a) Seed i?ivestigations. Investigations shall be begun for the discovery of 

 the most suitable time for gathering cones and as regards the keeping of 

 forest-seed (S.). The biology of germination of the most important forest- 

 trees shall be studied, with especial attention to the conditions of germina- 

 tion oftered by the soil (N.). The experimental plots for the investigation of 

 the percentage of soil-germination of the Norrland pine-seed shall be revised 

 and the results prepared for publication (S.). Existing areas for testing seeds 

 of various origins shall be revised when so required (S.). 



{b) Special measnres for seciirmo jiatiiral regroTcth. In suitable places experi- 

 ments by means of thinning in accordance with Wagner's method shall be 

 carried out (S.), and in connexion herewith the seed-producing capacity of 

 torest-margins of dififerent composition shall be studied (S.). The degree of 

 regrowth in cleared lands shall be investigated in connexion with their lie as 

 to the points of the compass (S.). The effect of brushwood-burning and 

 complete clearing of the soil shall be investigated with regard to the supply 

 of nitrogen to the soil (N.). 



[c) Measures of forest-cultivation. The experiments instituted for the investi- 

 gation of the most suitable time for sowing in Norrland shall be continued 

 (S.). Existing experimental cultures with pine and spruce in various combi- 

 nations shall be revised, if need be (S.). The course of growth in the roots of 

 planted trees shall be investigated with a view to the discovery of the most 

 suitable time for the planting (S. or N.). 



(</) The problem of tegroivth in special t\pes of forest. The investigations pre- 

 viously carried on concerning the difficulties of regrowth on the pine-heaths 

 shall be continued so far as is necessary for the completion of a report con- 

 cerning this problem (N.). 



The letter S indicate the forest-section, X. the physical section, and E. the entomological 

 section of these investigations. 



