VI. Study of the effect of thinning-s a? different fe 

 different species upon the growth and yield >o'f staml.' y.ij^. 



VII. Studies of growth, volume and yield". 



VIII. Systematic observations on the time of budding, flow- 

 ering, leafing and fruiting of the important species at the sta- 

 tion (Phehological Records). 



IX. Building up of collections of Forest flora, rocks, soil, 

 insects, fungi, etc., at the station, for purposes of demonstra- 

 tion and investigation. 



To Record Exact Effect Moisture on Trees and the Station's 



Land. 



A control station is to be established at which precipita- 

 tion, temperature of the air, wind velocity, humidity and 

 evaporation will be continuously measured throughout the 

 entire year. At three control stations, a record of soil tem- 

 perature and moisture content of the soil will be obtained. 

 Evaporating tanks are recommended, to show the average 

 evaporation in the district, and snow scales during the winter 

 to record the accumulation of snow and its thawing in the 

 spring. 



Experiments to Determine What Should Be Done With Burned 

 and Cut-Over Land. 



"Minnesota and the Lakes States in general," the report 

 says, "contains a large acreage of burned-over and cut-over 

 land which is not suitable for agriculture. A study of the 

 natural re-growth of these lands is of vital importance. This 

 study should be carried on intensively by means of sample 

 plots, on which the succession of different plant associations 

 should be determined, together with the physical factors in- 

 fluencing this succession. This study should lay emphasis on 

 determining what will be the ultimate future of this land if 

 left to itself, how long it will take for it to come back to 

 forest, and what will be the kind and character of forest 

 growth. This study should be complementary to the study 

 of the best silvicultural methods of cutting in the Norway, 

 White Pine type and swamp type. In order to carry out this 

 study, old cuttings of different ages, made under different 

 conditions, should be located and the progress of natural 

 reforestation recorded. From these, conclusions are to be 

 drawn as to the results following one OF another method. 



"In making these studies, sample plots of several acres in 

 extent should be selected, and a general description of the 



