ESTABLISHING FORESTS BY PLANTING 



379 



c 



FIG. 103. Methods of regular spacing. 



A. Squares. C. Equilateral triangles. 



B. Rectangles. D. Superposed squares. 



25. METHODS OF SEMI-REGULAR SPACING 



Under most conditions where planting is done in the United 

 States, some method of semi-regular spacing is practiced. In 

 this manner of spacing the planting area is not marked to indicate 

 the point at which each tree is set as in regular spacing. Semi- 

 regular spacing can be used on all sites and with an experienced 

 crew gives results which for most purposes are comparable with 

 regular spacing. The spacing is judged entirely by the eye or 

 by a series of flags set in lines across the field. 



The organization of the planting crew and its division into 

 units vary with the method of planting and implements used and 

 the character of the stock. In some instances each member of 

 the planting crew carries his own stock, opens the hole and in- 



