PREHARVEST INVENTORY 



Inventory data are presented for each unit in four stages: preharvest , harvest, 

 postharvest and final product recovery. Average tree sizes and volumes for the different 

 units were similar (table 2). D.b.h. ranged from 5.5 to 9.5 inches for all trees in the 

 five units. The mean tree volume was 6.0 to 8.3 ft^ for green trees and 2.7 to 5.2 ft^ 

 for dead trees. The cubic volume per acre for the various units varied between 4,104 

 and 5,588 ft-^. Preharvest inventory provided a baseline for measuring residue cleanup 

 efficiency. 



Procedures described by Brown (1974)^ were used in preharvest and postharvest 

 inventories of downed material. This procedure consists of measuring down material 

 along a random line and converting measurements to cubic volumes. 



Table 2 . --Preharvest inventory 



Unit No. \ 1 : 2 : 5:4 : 5 : Total 



Size (acre) 1.13 1.57 1.54 1.65 1.50 7.39 



STAND VOLUME (FT^)!/ 



Standing 1,596 2,599 3,004 4,877 3,598 15,674 



Down 4,669 3,844 5,601 4,017 2,949 21,080 



Total 6,265 6,443 8,605 8,894 6,547 36,754 



Vol per acre 5,544 4,104 5,588 5,390 4,365 



MEAN TREE VOLUME (FT^)-'^ 



Green 8.3 7.1 7.3 6.0 . 6.5 



Dead 5.2 4.8 4.1 2.7 4.1 



TREE D.B.H. (INCHES) 



Mean 7.1 6.8 7.0 6.4 6.4 



Range 5.5-9.5 5.6-7.7 5.6-8.8 5.7-7.2 5.9-7.4 



— ^ Stand gross volume to 2 1/2 inch top d.i.b. 

 2/ 



— Whole tree gross volume to 2 1/2 inch top d.i.b. 



^Brown, J. K. 1974. Handbook for inventorying downed woody material. USDA For. 

 Serv. Gen. Tech. Rep. INT-16, 24 p. Intermt. For. and Range Exp. Stn. , Ogden, Utah. 



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