CONTENTS 



Page 



INTRODUCTION 1 



METHODS 1 



Calculations 3 



RESULTS AND DISCUSSION 4 



Volume and Surface Area 4 



Composition of Slash 6 



Loading 7 



Bulk Density 7 



Void Volume to Surface Area Ratio (X) . . . 8 



Suspended Needle Mats 9 



ABSTRACT 



About 70 percent of the volume and surface area of spruce-fir 

 logging slash lies below the mid-depth of the slash. Material 

 to 1 centimeter in diameter was distributed vertically in the 

 same proportions as all other material. Old slash in the first 

 20 centimeters above the ground contained a higher proportion 

 of large material than new slash. Quantity of slash averaged 

 26.5 kg./m. 2 (118 tons/acre) dry weight with 0.57 kg. /m. 2 

 composed of material to 1 centimeter in diameter. Bulk 

 density of slash decreased vertically and averaged 0.030 g./cc. 

 for new slash and 0.053 for old slash. Needle mats suspended 

 in the slash occurred with a 40 percent frequency. 



