another "began. T7hon mailing a sale to a 

 lumber company wo should have to know 

 hoi; rraoh puro Douglas fir wo had. 



5:50 ~ Should a division of Stands into Site Glasses "bo 

 Hade in Reconnaissance? Upon TThat Should Such a 

 Division he Based and Ho:? Recorded and Determined 

 in tho J?ield 



RAIT: A. Site classes found necessary for estimating 



red fir 'typo for following reasons: 



1. Sstimate made on cordwood "basis: Existing tables 

 showed die-motor T7ith total height in ten foot classes. Dif- 

 icult to estimate heights on this "basis especially as thore 

 were also 16~ft. log lengths to he estimated for intermingled 

 Jeffrey pine and white pine saw timber* 



2. Red fir typo naturally falls into two sito classes: 

 Quality I site determined "b^ height of treos and general con- 

 dition of thrift. Height is assumed to "be true factor of 

 dftet.er. Treos hc,ve uniform taper* Grow on good soil and 

 have well-dovelopod crowns. Usually denser stand than on 

 Qualit^r II site where treos are short holed and in loss 

 thrifty condition.' ^ualit^r I sito usvally on northern and 

 eastern exposures where soil is deep and moisture conditions 

 favorable, ^ualitjr II site common to southern and v/estern 

 o;r->csures where soil is roclry and shallow ac a rule . 



B. Site tables advisable for fir type to eliminate 

 indivld-ual height measurements: 



1. Method of preparation: One thousand hypsometer meas- 

 urements taken on red and white fir showed radical differ- 



289 



