VOI.UME; INCRKMENT ON CUT-OVER PULPWOOD LANDS 



617 



Having obtained the volume of any inch class at the time of meas- 

 nrement by application of the volume and number per acre for that 

 inch class, the net volume increment for that inch class for the past 

 decade and gross volume increment for the succeeding decade may be 

 obtained. 



The diameter of any inch class for the previous decade can be se- 

 cured by reading it from the growth cu'rve for any fractional inch, 

 and the volume for any fractional inch class can be read from the 

 volume curve. 



A rough volume regulation of virgin lands may be made following 

 a study of cut-over land in the vicinity. Having determined the 

 available merchantable pulpwood on the working unit, the annual cut 

 may be fixed to yield an equal or better cut in such period of years 

 as is determined from the study of the cut-over land. Comparison 

 should be made not only of merchantable volume but of type acreage 

 to determine whether the conditions on the virgin area are similar to 

 the original conditions on the cut-over land. Detailed study of virgin 

 forest will serve later to give an important check on mortality, but 

 other factors are too liable to change to make such studies of value. 



PRKSSLER BORING RECORDS 



Date Strip No Couise Locality . 



Date of cut Tallied by 



Species 



Type 



Other 

 Class'n 1 



D IS. H. D. S. H. ! (I)' 



(2) 



(3) 



W 



(S) 'Helg-ht Remarks 



1. Rings in last % inch of radius. 



2. Rings in last inch of radius. 



3. Growth (inches) for the first ten years since the cut. 



4. Growth (inches) for the ten years previous to the cut. 

 3. Entire growth (inches) since the cut. 



LITERATURE CITED 



Gary. Austin. — Excerpt from Report of Forest Coinmissioner of Maine for 



1896. Pp. 26-27, 122-128, and Appendix, p. 21 and following. 

 Chandler. B. A. — Notes on a Method of Studying Current Growth Per Gent. 



Forestry Quarterly, Vol. XIV, pp, 453-460. 

 Chapman, H. H. — A Method of Investigating Yield per Acre in Many-aged 



Stands. Forestry Quarterly, Vol. X, pp. 458-469. 

 Fernow, B. E. — Notes on Increment of Spruce in West Virginia and Fire 



Losses. Forestry Quarterly, Vol. Ill, pp. 34.6-348. 

 Moore, Barrington. — Yield in Uneven-aged Stands. Proceedings of Society 



of American Foresters, Vol. IX, pp. 216-228. 

 Stetson, J. G. — Some Suggestions on Predicting Growth for Short Periods. 



Forestry Quarterly, Vol. VIII, pp. 326-331. 



