SHORTLEAF PINE : IMPORTANCE AND MANAGEMENT. 



45 



Table 26. — Stumpage value per acre and gross interest yielded on land value 

 from cordioood in old field stands of shortleaf pine in Virginia. 1 





Thinned stand. 



Unthinned stand. 





Total value per 















acre includ- 



Gross rate 







Gross rate 



Age. 



Final. 



ing accumu- 



per cent 



Yield 



Value of 



per cent 





yield. 



lated value of 



yielded 



per 



stand. 



yielded 







thinnings at 4 



on land 



acre. 





on land 







per cent com- 



value. 2 







value. 







pound interest. 











Years. 



Cords. 



Dolls. 



Per cent. 



Cords. 



Dolls. 



Per cent. 



20 

 25 



47 

 52 



13.74 





47 

 57 



11.75 

 14.25 



4.3 

 4.2 



4.0 



30 



57 



16.08 



4.0 



62 



15.50 



3.8 



35 



60 



18.44 



3.8 



64 



16.00 



3.5 



40 



60 



19.65 



3.6 



65 



16.25 



3.0 



45 



59 



23.94 



3.5 



64 



16.00 



2.8 



50 



57 



26.43 



3.2 



63 



15.75 



2.5 



1 Cordwood stumpage valued at 25 cents. 



s Gross interest rate is figured on an investment including cost of protection, and interest on land value 

 assumed to be So per acre. Taxes and other costs equal 1 per cent. 



CUTTING AND REPRODUCTION. 



In forest management the cutting of stands is looked upon as an 

 intermediate step in the continuous process of timber production. 

 The capacity of the species for natural regeneration usually deter- 

 mines the method of final cut. The easy reproduction of shortleaf 

 pine avoids a loss of time between the timber crops and permits of 

 concentration and economy in lumbering. As the seed is small and 

 matures in abundance about every third year, with partial crops 

 in the interval, it is aggressive and takes complete possession of 

 abandoned fields and clearings. (See PL V.) 



The essential requirements for the formation of fully stocked 

 young stands are (1) an abundance of light, secured by making 

 large-sized openings, and (2) the presence of seed-bearing trees 

 scattered over or near the openings. The method of cutting depends 

 upon whether the stand is pure or mixed. Shortleaf is most produc- 

 tive in pure stands (PI. IX). 



PURE STANDS. 



For pure stands some form of the clear-cutting system should be 

 used. Two methods are suggested. One leaves isolated seed trees 

 scattered uniformly over the tract, and is applicable when the bulk 

 of the contents of the stand is to be taken at one lumbering oper- 

 ation. This system may be modified and applied in the form of 

 a strip, group, or compartment. The oilier is to clear cut in strip;-. 



The first method scatters seed uniformly and leaves a few trees 

 on the ground for local use after the young growth has been estab- 

 lished. This is often a convenience on farms or near small settle- 

 ments. Tree-; left lor seed should have well developed crowns and 



