lower elevation. These records indicate that spruce, subalpine fir and western larch 

 seed production in 1954 was exceptionally good (table 1). Just how much of this may 

 have been destroyed on the study areas by site preparation treatments is unknown. 



Each of the five strips was divided at mid-slope into two different treatment areas, 

 providing upper- and lower-slope replications for each treatment. Treatments were 

 assigned at random within upper- and lower-slope replications with the restriction that 

 both burn treatments would occupy the same strip. Before and after treatment, surveys 

 were made to determine how well each treatment modified the seedling environment. 

 Point-samples were taken every 5 links along transects located diagonally across each 

 treatment area. Vegetation types (tall shrubs, low shrubs, and herbaceous) and seed- 

 bed conditions (mineral, burned-mineral, and undisturbed) were recorded at each point. 



To determine how effectively the treatments aided natural regeneration, reproduction 

 surveys were made during the summer of 1960 using two random transects in each of the 

 treatment areas. Transects were oriented east-west, perpendicular to the cutting line. 

 Reproduction was recorded within concentric, circular 1- and 4-milacre plots spaced 

 1/2-chain apart along the transect lines. Only 3-year-old and older seedlings were 

 tallied as established reproduction. The advance reproduction and subsequent repro- 

 duction were recorded separately, by species. No attempt was made to evaluate the 

 production potential of the advance regeneration. Four-milacre stocking was determined 

 on the basis of presence and dominance of species. A complete reproduction record was 

 made on the 1-milacre unit to provide per-acre estimates of the potential stand. Visual 

 estimates of vegetation cover and soil-surface conditions were also made on the 1-milacre 

 units . 



Statistical analysis was made where results were not obvious. Results of these 

 analyses are reported in the text as "significant" or "nonsignificant" based on a 95 

 percent confidence level. 



Table l.-- Seed production during a 9-year period near the Roundtop Mountain 

 study area^ ~" " 



Western Douglas- Engelmann Subalpine 



Year - larch fir spruce fir^ 



Thousands of seed per acre 



1952 .'^ 1.7 10.2 11.1 1.2 



1953 -- . 0.4 2.6 0.6 



1954 17.6 10.4 232.6 6.3 

 1955-56 



(2-year total) 19.6 20.4 27.2 9.0 



1957 4.7 3.0 1.1 0.2 

 1958-60 



(3-year total) 2.8 10.6 66.2 1.5 



Data provided by Potlatch Forests, Inc. 

 ^Includes some grand fir. 



