I-OKi;ST PLANTING IN SOUTHERN MICHIGAN 



The present stand per acre in each case is as follows : 



135 



Since the per cent of trees dropping out has been modified very con- 

 siderably by the work of the borer, these figures can not be considered 

 as normal. 



A better example of the eflFects of spacing is furnished by two y^lots 

 of white pine planted in 1904 with spacings of 3x3 and 4i/2x4J/2. 

 Based on measurements made in the fall of 1020, the results have 

 been as follows : 



The present stand per acre follows 



The relative condition of the stands in the fall of 1916 is shown in 

 the following table : 



The 1920 figures, showing the results of 17 years of growth, indicate 

 clearly that most of the advantages lie with the wider spacing. The 

 cost of establishment was about one-half that of the 3x3 ; the average 

 height and diameter are now greater ; the stand closed over only about 

 two years later; and the individual trees have the branches shaded out 



