Harvey, Alan E.; Jurgensen, Martin F.; Larsen, Michael J.; Schlieter, Joyce A. 

 Distribution of active ectomycorrhizal short roots in forest soils of the Inland North- 

 west: effects of site and disturbance. Research Paper INT-374. Ogden, UT: U.S. 

 Department of Agriculture, Forest Service, Intermountain Research Station; 1986. 

 8 p. 



Approximately 75 percent of ectomycorrhizal activities that occurred in soils from 

 eight undisturbed and six variously disturbed sites occurred in shallow organic 

 horizons. These horizons represented only the first 4 cm of soil depth. This dispro- 

 portionate participation of surface organic materials emphasizes a need to conserve 

 them in forested ecosystems of the Inland West. 



KEYWORDS: soil microbial activity, soil quality, soil productivity, soil management, 

 fire management, site preparation, site protection 



