system consists of laying off the woodlot in a definite number 

 of strips of varying widths, and of cutting one strip a year 

 until the entire woodlot has been gone over. 



PLANTING. 



In order that the woodlot may yield the greatest possible 

 crop of wood the land must be kept fully stocked with growing 

 trees. The number per acre will vary with the age and size 

 of the trees. Prof. E. L. Sponsler, University of Michigan, 

 is authority for the following table, which gives the number 

 of trees at different sizes necessary to keep the ground fully 

 stocked. 



TABLE 1. Number of Trees per Acre Required for a Full Stand. 



Diameter. 1 No. per acre. 



14 inches 130 



16 inches 100 



18 inches 85 



Diameter. 1 No. per acre. 



2 inches 2,000 



4 inches ' 900 



6 inches . . 510 



8 inches 320 



10 inches 235 



12 inches. . 170 



20 inches, 

 22 inches, 

 24 inches, 



75 

 65 

 55 



To give a clearer idea of the spacing of trees in a full stand, 

 the following table gives the number of trees per acre for the 

 different spacings. 



TABLE 2.- 



-Nutnber of Plants Required to Set an Acre of Ground at the 

 Given Distances. 



Spacing. No. of plants. 



3 by 7 feet 2,074 



4 by 5 feet 2,178 



4 by 12 feet 907 



5 by 9 feet 968 



6 by 8 feet 907 



7 by 12 feet 518 



8 by 10 feet 544 



9 by 15 feet 322 



10 by 15 feet 290 



10 by 18 feet 242 



10 by 20 feet 217 



10 by 24 feet 181 



15 by 18 feet ' 161 



10 by 30 feet 145 



Spacing. No. of plants. 



12 by 30 feet 121 



15 by 30 feet 96 



18 by 24 feet 100 



20 by 20 feet 108 



12 by 42 feet. 

 15 by 36 feet. 

 12 by 48 feet. 

 24 by 24 feet. 

 18 by 36 feet. 

 12 by 60 feet. 

 15 by 48 feet. 

 24 by 30 feet. 

 15 by 54 feet. 

 18 by 42 feet. 



86 

 80 

 75 

 75 

 67 

 60 

 60 

 60 

 53 

 57 



The planting may be done at any convenient time after 

 the thinning has been done. The best time and the best 

 method to follow will be determined by the character of the 

 ground and the kind of trees that are to be planted. Walnuts 

 and acorns may be planted in the fall, soon after they ripen 



1. The diameter of a tree is measured at four and one-half feet above the ground. 



