Regeneration outlook on BLM lands in the Southern Oregon Cascades.

Stein, William I.

doi:10.2737/pnw-rp-284

Cited by 6 publications

(9 citation statements)

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“…The contrasts are not as great among these areas as they are between the Dead Indian and Butte Falls areas (Stein 1981). But the stocking differences revealed in grouping data by location and the dissimilarities among areas in correlations and regressions found to relate significantly to stocking indicate that the areas are different with respect to reforestation.…”

Section: Forest Management Applicationsmentioning

confidence: 83%

“…There is a good mix of other species interspersed with Douglas-fir in all three areas. A preponderant role for true firs does not seem to have been fostered by the partial cutting that has been done, as was evident in Dead Indian (Stein 1981). Instances were observed in partial cuts where Douglas-fir and ponderosa pine regeneration was sparse in relation to cones produced by the available seed source, whereas incense-cedar regeneration seemed relatively abundant wherever there was any source of seed.…”

Section: Species Compositionmentioning

confidence: 83%

“…The study had two primary objectives: (1) to evaluate in depth the results of reforestation efforts and (2) to develop improved silvicultural guidelines for establishing conifer regeneration in southwestern Oregon. Information developed for Dead Indian and Butte Falls, the eastern parts of the Medford District, was published as Research Paper PNW-284, "Regeneration Outlook on BLM Lands in the Southern Oregon Cascades" (Stein 1981). This report summarizes comparable information obtained in 1974-76 field surveys of cutovers located in three geographic areas called, for convenience, Applegate, Evans, and Galice-Glendale; these are the western or Siskiyou Mountain parts of the Medford District ( fig.…”

Section: Introductionmentioning

confidence: 91%

“…Results reported in this paper and in Research Paper PNW-284 (Stein 1981) comprise a comprehensive and detailed evaluation of the regeneration produced by past silvicultural practices. Opportunities for improvement are evident from the data as well as from the foregoing interpretive remarks.…”

Section: An Overviewmentioning

confidence: 99%

“…Accumulation of cold air in valley bottoms and lower slopes is a certainty, though, and localized frost hazard areas are likely. Answers developed for Dead Indian (Stein 1981) on the identification of frost hazards and the amount of canopy needed to protect regeneration should suffice for solving frost problems in the rest of the District.…”

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confidence: 99%

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Regeneration outlook on BLM Lands in the Siskiyou Mountains.

Stein¹

1986

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A survey of timberland cut over from 1956 to 1971 in the Applegate, Evans, and Galice-Glendale areas of southwestern Oregon showed that both partial cuts and clearcuts were well stocked with a combination of regeneration that started before and after harvest cutting. Advance regeneration was a major stocking component in partial cuts. Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was the predominant species of advance and subsequent regeneration in both partial cuts and clearcuts. Stocking differed significantly by forest type, soil series, soil origin, soil depth, and stream drainage and correlated with an array of environmental variables. Regression equations describe present stocking patterns, and other equations predict future stocking based on variables that can be observed or specified before harvest. Reforestation can be improved by paying greater attention to forest type, soil series, site conditions, and differences in plant communities when selecting harvest method and reforestation techniques.Keywords: Regeneration (stand), regeneration (natural), regeneration (artificial), clearcutting systems, partial cutting, stand development, Oregon (Siskiyou Mountains), southwestern Oregon. SummaryFor more than a decade, various intensities of partial cutting have been used in the Siskiyou Mountains of southwestern Oregon by the Bureau of Land Management, U.S. Department of the Interior, and by other land managers to foster establishment of natural regeneration. Difficulties experienced in reforesting some clearcuts were a prime reason for the emphasis on partial cutting. This paper encompasses the second half of a comprehensive study undertaken cooperatively to evaluate reforestation results obtained on the Medford District from both clearcutting and partial cutting, to identify influencing variables and problems, and to recommend improvements in silvicultural practices.Stocking levels, composition of regeneration, and species dominance were determined from data collected on 134 plots randomly located in partial cuts and clearcuts logged from 1956 to 1971 in the Applegate, Evans, and Galice-Glendale areas. Each plot consisted of twenty 4-milacre (0.00162-ha) subplots, located systematically in a 2-acre (0.8-ha) grid. Stocking (occurrence) data were also sorted into environmental groupings and subjected to correlation, regression, and variance analyses to identify significant associations.Both partial cuts and clearcuts in the Siskiyous were well stocked-Y with regeneration that started before and after harvest cutting. Total stocking varied somewhat among the Applegate, Evans, and Galice-Glendale areas, but averaged 81 percent in partial cuts and 77 percent in clearcuts. In partial cuts, advance regeneration comprised 40 to 65 percent of the total stocking. Clearcuts had more regeneration that started after harvesting than did partial cuts; clearcuts averaged 71 percent subsequent stocking versus 56 percent for partial cuts.1 /Compared to a full stocking of 250 uniformly distributed trees per acre (618 per...

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Section: Forest Management Applicationsmentioning

confidence: 83%

Section: Species Compositionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 91%

Section: An Overviewmentioning

confidence: 99%

mentioning

confidence: 99%

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