78 SUMMARY OF THE PROGRAMME [78] 



New investigations. 



The frequency and distribution of the brown soil type with mild humus 

 in the southern and middle parts of Sweden (N). 



b) Ling heaths. 



Continued investigations. 



The mapping, already accomplished and other material, collected for illu- 

 strating the distribution and suitability of the ling heaths for forest produc- 

 tion will be rearranged and eventually plublished (S); studies of the biology 

 of the ground on ling heaths (N). 



c) The n-ater-logging of the förests . 



Revision and publication of the material, illustrating progress and velocity 

 of water-logging (N); the change of the soil, caused by water-logging (N); 

 rearrangement for publication of the investigations regarding the influence of 

 ditching on the subsoil water (N). 



d) 77/<? freezing of forest grounds. 



Studies of the phenomena of freezing, partly in combination with experi- 

 ments in practical sylviculture (N and S). See mom. i c. 



e) The conversion of Moor-land inlo Forest-land. 



Continued investigations. 



Experiments in draining, already carried out, are to be studied with re- 

 ference to the conversion of nitrogen (N). 



New investigations. 



Revision of older ditchings in Norrland (N); the condition of the soil 

 and the forest production of older stånds on moors who have been drained 

 out (N and S); draining operations on the research district of Rokliden (N) 

 and on the research domains (N and S). 



f) Investigations into the influence of the life of loicer animals on the nainre of 



the soil. (See mom. 3 a). 



New investigations. 



Preparation of reliable methods of collecting the animals living in the 

 ground (E); investigations on the fauna in certain types of forest and com- 

 parison between clearings und undisturbed stånds (E and N). 



Further investigations may be established according to the arising of actual 

 problems, provided that the programme above does not be disturbed. 



The Forest section also has to carry out all sorts of practical sylvicultural 

 operations on the research domains, which cannot be particularized here. 



