. Regeneration in mixed conifer shelterwood cuttings in the Cascade Range of eastern Oregon. Conifers; Forest regeneration Oregon; Forest regeneration Cascade Range. OBJECTIVES. INTRODUCTION The purpose of this study was to: (1) quantitatively evaluate the regeneration found on the shelterwood units, (2) evaluate condition of the residual over- stories during the regeneration period, and (3) attempt to iden- tify environmental factors asso- ciated with the presence or ab- sence of regeneration. During the late 1960's and 1970's, the shelterwood method has been used increasingly to harvest timb
. Regeneration in mixed conifer shelterwood cuttings in the Cascade Range of eastern Oregon. Conifers; Forest regeneration Oregon; Forest regeneration Cascade Range. OBJECTIVES. INTRODUCTION The purpose of this study was to: (1) quantitatively evaluate the regeneration found on the shelterwood units, (2) evaluate condition of the residual over- stories during the regeneration period, and (3) attempt to iden- tify environmental factors asso- ciated with the presence or ab- sence of regeneration. During the late 1960's and 1970's, the shelterwood method has been used increasingly to harvest timber from upper slope mixed conifer forests of the east side Oregon Cascade Range. In some areas, this method has been tried as a means of modifying the harsh microclimatic conditions found on many high elevation clearcuts that cause difficulties in regenera- tion. And, as esthetic con- siderations became increasingly important, the shelterwood method was used in many areas open to public view to maintain the visual quality of the landscape. Some of these shelterwood units are now old enough for regenera- tion to be established. There- fore, in 1978, I began a study to survey regeneration, the factors affecting its establishment, and the condition of the residual overstory. This paper reports the results of that field survey in 1978 on the Deschutes and Winema National Forests. Specific objectives were to: 1. Estimate success of regen- eration in terms of stocking percentage and density (numbe per acre); 2. Estimate species composition of the regeneration; 3. Estimate stocking of regen- eration of preharvest (advance) and postharvest (natural and planted) origin; 4. Estimate the relationship between regeneration and some measurable environ- mental variables, such as elevation, aspect, slope, and overstory density; and 5. Estimate survival and con- dition of the residual over- s tories. STUDY AREAS Study areas (plots) were located in the mixed conifer forest type of the eastern Ca
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectconifers
