The TWDEF is in the Wasatch Mountains of northern Utah about 15 km south of the Utah-Idaho border and about 65 km east of Logan. It is comprised of four sections (sec. 15, 16, 21 and 22, Township 13 North, Range 4 East, Salt Lake Meridian). Utah State University owns one of the sections; the remainder are part of the Logan Ranger District of the Cache National Forest. Access to within 8 km of the experimental forest is via Highway 89. Access to the boundary and within the forest is on unpaved but excellent forest road which bisects the forest north to south; the remainder of the forest is accessed via primitive roads and trails. Winter access is limited to skis or snow machine.

Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa) are the dominant late successional species throughout the forest. The major early successional species include lodgepole pine (Pinus contorta var. latifolia) and aspen (Populus tremuloides), with Douglas-fir (Pseudotsuga menziesii) and limber pine (Pinus flexilis) on south-facing ridges and at lower elevations. The aspen and conifer stands are interspersed with meadows and shrub-forb-grass uplands.

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1996

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Fire Frequency and the Vegetation Mosaic of a Spruce-Fir Forest in Northern Utah, Linda Wadleigh and Michael J. Jenkins; Great Basin Naturalist

1995

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Post-Fire Succession and Disturbance Interactions on an Intermountain Subalpine Spruce-Fir Forest, Christopher A. Discus

1994

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Incorporating Vegetative Diversity Measures in Forest-Level Planning: A Case Study on the Utah State University School Forest, David A. Holland

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Economic Trade-Offs of Managing Forests for Timber Production and Vegetative Diversity, David N. Holland, Robert J. Lilieholm, David W. Roberts, and J Keith Gilless; Canadian Jorunal of Forest Research

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The Occurrence of Non-Ring Producing Branches in Abies lasiocarpa, Scott D. Roberts; Trees - Structure and Function

1993

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Canopy Stratification and Leaf Area Efficiency: A Conceptualization, S D. Roberts; Forest Ecology and Management

1992

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Influence of Leaf Area and Canopy Structure on Size-Density Relations in Even-Aged Lodgepole Pine Stands, T J. Dean; Forest Ecology and Management

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Forest Production and the Organization of Foliage within Crowns and Canopies, S B. Jack; Forest Ecology and Management

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Production Efficiency of Abies lasiocarpa: Influence of Vertical Distribution of Leaf Area, Scott D. Roberts and James N. Long; Canadian Jorunal of Forest Research

1991

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Analysis of Stand Density Effects on Canopy Structure: A Conceptual Approach, Steven B. Jack and James N. Long; Trees - Structure and Function

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Response of Leaf Area Index to Density for Two Contrasting Tree Species, Steven B. Jack and James N. Long; Canadian Journal of Forest Research

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Structure, Production and Leaf Area Dynamics: A Comparison of Lodgepole Pine and Sunflower, Steven B. Jack and James N. Long; Annals of Botany

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Production Efficiency in Subalpine Conifers: The Influence of Crown Size and Canopy Structure, Scott D. Roberts

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Effects of Storage, Planting Date, and Shelter on Engelmann Spruce Containerized Seedlings in the Central Rockies, S D. Roberts; Western Journal of Applied Forestry

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Comparison of Some Methods for Collecting and Analyzing Data on Aboveground Net Production and Diversity of Herbaceous Vegetation in a Northern Utah Subalpine Context, N E. West; Vegetatio

1990

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Forest Canopies: Form and Functional Relationships, Steven Jack

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Determinants of Stemwood Production in Pinus contorta var. Latifolia Forests: The Influence of Site Quality and Stand Structure, J N. Long; Journal of Applied Ecology

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Canopy Development and Leaf Area Efficiency: Links between Production Ecology and Density Management, J N. Long and F W. Smith; Forest Research Institute Bulletin, New Zealand

1989

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Engelmann Spruce Cone Losses Caused by Insects in Northern Utah in a Year of Low Cone Production, D E. Cameron; Great Basin Naturalist

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Estimating Leaf Area of Abies lasiocarpa Across Ranges of Stand Density and Site Quality, James N. Long and Frederick W. Smith; Canadian Jorunal of Forest Research

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Intra- and Interspecific Tests of Some Indicators of Relative Tolerance, Joy N. Parker and James N. Long; Forest Ecology and Management

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The Influence of Canopy Architecture on Stemwood Production and Growth Efficiency of Pinus contorta Var. latifolia, F W. Smith; Journal of Applied Ecology

1988

Influence of Stand Density on Log Quality of Lodgepole Pine, L A. Ballard and James N. long; Canadian Journal of Forest Research

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Bias in Leaf Area -- Sapwood Area Ratios and Its Impact on Growth Analysis in Lodgepole Pine, T J. Dean; Trees - Structure and Function

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Leaf Area-Sapwood Area Relations of Lodgepole Pine as Influenced by Stand Density and Site Index, James N. Long and Frederick W. Smith; Canadian Jorunal of Forest Research

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Fire Frequency and the Vegetal Mosaic of the Utah State University Experimental Forest, Linda L. Wadleigh-Anhold

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Selection of Microhabitat by the Red-Backed Vole, Clethrionomys gapperi, Alice P. Wywialowski and Graham W. Smith; Great Basin Naturalist

1987

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Effect of Initial Stand Density on End-of-Rotation First Log Quality Characteristics of Lodgepole Pine, Louis A. Ballard

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Corrections for Effusion from Gas-Permeable Enclosures for the Determination of Low N2(C2H2) Fixation Rates in Situ, I Borjesson; Soil Biology and Biochemistry

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The Association of Seed and Cone Predator Populations and Cone Crop Production in Engelmann Spruce, Dawn E. Cameron

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Impact of the Western Spruce Budworm (Lepidoptera: Tortricidae) on Buds, Developing Cones, and Seeds of Douglas-fir in West Central Idaho, C J. Frank; Environmental Entomology

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Dinitrogen Fixation in a Montane Forest Sere Determined by 15N2 Assimilation and in situ Acetylene-Reduction Methods, J C. Skujiņš, C C. Tann, and I Börjesson; Soil Biology and Biochemistry

Elk Hiding and Thermal Cover Guidelines in the Context of Lodgepole Pine Stand Density, F W. Smith; Western Journal of Applied Forestry

1986

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Stem Mechanics as a Theoretical Basis for the Self-Thinning Rule, Thomas J. Dean

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Validity of Constant-Stress and Elastic-Instability Principles of Stem Formation in Pinus contorta and Trifolium pratense, T J. Dean; Annals of Botany

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Variation in Sapwood Area-Leaf Area Relations Within Two Stands of Lodgepole Pine, T. J. Dean and J. N. Long; Forest Science

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Investigation of Host Selection by Mountain Pine Beetle (Dendroctonus ponderosae) Hopk. in Lodgepole Pine (Pinus contorta) Dougl., Thomas J. Eager

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First- and Second- Year Survival of Containerized Engelmann Spruce in Relation to Initial Seedling Size, Franklin D. Hines and James N. Long; Canadian Jorunal of Forest Research

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Sapwood Area of Pinus contorta Stands as a Function of Mean Size and Density, J N. Long; Oecologia

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A Lodgepole Pine Density Management Diagram, J. B. McCarter and James N. Long; Western Journal of Applied Forery

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Relative Tolerance: A Test of Some Indirect Criteria, Joy N. Parker

Nitrogen Fixation and Allelopathy in Arid and Forest Soils in the Western United States, C C. Tann

1985

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Insect Communities and Faunas of a Rocky Mountain Subalpine Sere, David J. Schimpf and James A. MacMahon; Great Basin Naturalist

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Preferences of Red-Backed Voles and Deer Mice for Differing Structural Habitats, Alice P. Wywialowski

1984

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A Preliminary Quantification of the Impacts of Aspen to Conifer Succession on Water Yield - II. Modeling Results, Gerald F. Gifford, William Humphries, and Richard A. Jaynes; Water Resources Bulletin

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A Preliminary Quantification of the Impacts of Aspen to Conifer Succession on Water Yield - I. Heat Pulse Methodology for Model Calibration, G. Gifford, W. Humphries, and R. Jaynes; Water Resources Bulletin

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Patterns of Soil Loss and Snowmelt from an Intermountain Rangeland Site, Steven A. Loomis

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Average Seasonal Phytomass: A Temporally Independent Index of Herbaceous Plant Dominance, N E. West; Vegetatio

1983

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Rhizosphere N2 Fixation in a Forest Ecosystem in situ Assays and Evaluation of the Acetylene Reduction Technique on the Utah State University Forest, Inger Borjesson

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The Effects of Initial Size on Subsequent Performance in Container Grown Engelmann Spruce Seedlings, Franklin D. Hines