Forest Sciences Commons^™

Moderate-Scale Mapping Methods Of Aspen Stand Types : A Case Study For Cedar Mountain In Southern Utah, Chad M. Oukrop, David M. Evans, Dale L. Bartos, R. Douglas Ramsey, Ronald J. Ryel

Aspen Bibliography

Quaking aspen (Populus tremuloides Michx.) are the most widely distributed tree species across North America, but its dominance is declining in many areas of the western United States, with certain areas experiencing rapid mortality events over the past decade. The loss of aspen from western landscapes will continue to profoundly impact biological, commercial, and aesthetic resources associated with aspen. However, many options are available for its restoration. Advances in remote sensing technologies offer cost-effective means to produce spatial and quantitative information on the distribution and severity of declining aspen at many scales. This report describes the development and application of …

Review Of The Potential Effects Of Climate Change On Quaking Aspen (Populus Tremuloides) In The Western United States And A New Tool For Surveying Aspen Decline, Toni L. Morelli, Susan C. Carr

Aspen Bibliography

We conducted a literature review of the effects of climate on the distribution and growth of quaking aspen (Populus tremuloides Michx.) in the Western United States. Based on our review, we summarize models of historical climate determi- nants of contemporary aspen distribution. Most quantitative climate-based models linked aspen presence and growth to moisture availability and solar radiation.

We describe research results pertaining to global climate change effects on aspen distribution and vigor. In addition, we present potential interactive effects related to climate change and natural disturbances and insect and pathogen outbreaks. Finally, we review the phenomenon of sudden aspen decline …

Multicentury Fire And Forest Histories At 19 Sites In Utah And Eastern Nevada, Emily K. Heyerdahl, Peter M. Brown, Stanley G. Kitchen, Marc H. Weber

Aspen Bibliography

Our objective is to provide site-specific fire and forest histories from Utah and eastern Nevada that can be used for land management or additional research. We systematically sampled fire scars and tree-recruitment dates across broad gradients in elevation and forest type at 13 sites in Utah and 1 in eastern Nevada to characterize spatial and temporal variation in historical fire regimes as well as forest structure and composition. We collected similar data non-systematically at five additional sites in Utah. These 19 sites include a broad range of forest types (from pinyon-juniper woodlands to spruce-fir forests) and fire regime types. In …

Web-Based Spatial Decision Support System And Watershed Management With A Case Study, Yanli Zhang, Matthew W. Mcbroom, J. Degroote, R. L. Kauten, P. K. Barten

Faculty Publications

In order to maintain a proper balance between development pressure and water resources protection, and also to improve public participation, efficient tools and techniques for soil and water conservation projects are needed. This paper describes the development and application of a web-based watershed management spatial decision support system, WebWMPI. The WebWMPI uses the Watershed Management Priority Indices (WMPI) approach which is a prioritizing method for watershed management planning and it integrates land use/cover, hydrological data, soils, slope, roads, and other spatial data. The land is divided into three categories: Conservation Priority Index (CPI) land, Restoration Priority Index (RPI) land, and …

Coping With Forest Fragmentation: A Comparison Of Colobus Angolensis Palliatus Dietary Diversity And Behavioral Plasticity In The East Sagara Forest, Tanzania., Noah T. Dunham

Honors Projects

Habitat destruction and forest fragmentation are perhaps the largest threats to primate species around the world. While national parks, games reserves, and primate sanctuaries are instrumental in primate conservation, research suggests that some non-governmentally protected forest fragments may also serve as viable habitats for primates. Of course not all primates respond to fragmentation in the same way, but a species’ ability to survive in a fragment relates to 1) home range size 2) degree of frugivory 3) dietary flexibility and behavioral plasticity and 4) ability to utilize matrix habitats. Here I describe these variables in relation to black and white …

Timber Talk, Vol. 49, No. 2, June 1, 2011

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News ; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; New Nebraska “Secondary Processor” Directory; Sand Creek Post and Beam Named 2011 Nebraska Small Business of the Year; Poison Ivy, Oak, and Sumac; The Trouble With Ethanol; Trends — From One Saw Doctor’s Perspective; Nebraska Forestry Industry Spotlight; The Trading Post; Timber Sales

Timber Talk, Vol. 49, No. 4, November 1, 2011

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; The Business Plan: Critical To Start-Up And Growth; A Baker’s Dozen Marketing Tips; Nebraska Forestry Industry Spotlight; The Trading Post; Proper Method of Bore Cutting Revisited; Timber Sales.

Climate Change And Forest Diseases, R. N. Sturrock, S. J. Frankel, A. V. Brown, P. E. Hennon, J. T. Kliejunas, K. J. Lewis, J. J. Worrall, A. J. Woods

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

As climate changes, the effects of forest diseases on forest ecosystems will change. We review knowledge of relationships between climate variables and several forest diseases, as well as current evidence of how climate, host and pathogen interactions are responding or might respond to climate change. Many forests can be managed to both adapt to climate change and minimize the undesirable effects of expected increases in tree mortality. We discuss four types of forest and disease management tactics – monitoring, forecasting, planning and mitigation – and provide case studies of yellow-cedar decline and sudden aspen decline to illustrate how forest diseases …

The Green Legacy Project: Evaluating Campus Tree Benefits, Joy Fritschle, Gary Coutu, Joan Welch, Gerard Hertel

Geography & Planning Faculty Publications

No abstract provided.

Applications Of Airborne And Portable Lidar In The Structural Determination, Management, And Conservation Of Southeastern U.S. Pine Forests, Claudia De Mendonca Costa Synek Listopad

Electronic Theses and Dissertations

Active remote sensing techniques, such as Light Detection and Ranging (LiDAR), have transformed the field of forestry and natural resource management in the last decade. Intensive assessments of forest resources and detailed structural assessments can now be accomplished faster and at multiple landscape scales. The ecological applications of having this valuable information at-hand are still only being developed. This work explores the use of two active remote sensing techniques, airborne and portable LiDAR for forestry applications in a rapidly changing landscape, Southeastern Coastal Pine woodlands. Understanding the strengths and weaknesses of airborne and portable LiDAR, the tools used to extract …

Winter Wheat Yield And Yield Components As Affected By Soil Tillage Systems, Irena Jug, Danijel Jug, Mirjana Sabo, Bojan Stipesevic, Miro Stosic

Turkish Journal of Agriculture and Forestry

Eight different soil tillage systems (TS) for winter wheat after soybean crop production were compared at the chernozem soil type in Croatian Baranya region in a 4-year period (2001/2002, 2002/2003, 2003/2004, 2004/2005). Tillage systems were: CT) conventional tillage, based on autumn mouldboard ploughing; DH) autumn disc harrowing; CH) autumn disc harrowing + chiselling; NT) No-tillage; CSDW) DH for winter wheat, alternated with CT for previous crop soybean; CWDS) CT for wheat, DH for soybean; CsNw) NT for wheat, CT for soybean; and CwNs) CT for wheat, NT for soybean. The dry conditions experienced in 2002/2003 decreased at half winter wheat …

Genetic Analysis Of Preharvest Sprouting Tolerance In Bread Wheat (Triticum Aestivum L. Emend. Thell.), Cemal Yücel, Faheem Shehzad Baloch, Rüştü Hati̇poğlu, Hakan Özkan

Turkish Journal of Agriculture and Forestry

Rains during grain ripening in wheat (Triticum aestivum L.) can cause preharvest sprouting (PHS), which drastically affects the grain yield and the baking quality of flour. In the present study, to screen 7 cultivars and 4 lines of spring bread wheat for PHS, germination tests were conducted with seeds obtained from wet spikes harvested immediately after natural rainfall. Germination tests were carried out as 3 different treatments: 1) seeds immediately germinated after hand-threshing on sampling day (T_1), 2) seeds germinated 1 week later after hand-threshing (T_2), and 3) 10 intact spikes kept on paper under laboratory conditions at room temperature, …

Sensitivity Of Cercospora Beticola Populations In Turkey To Flutriafol, Mancozeb, And Fentin Acetate, Aynur Tümbek, Pinar Özeren, Riza Kaya, Yakup Zekai̇ Katircioğlu, Sali̇h Maden

Turkish Journal of Agriculture and Forestry

The sensitivity of sugar beet leaf spot disease caused by Cercospora beticola to fungicides used in Turkey was determined using a mycelial growth assay in petri dishes with 100 fungal isolates. The isolates were obtained from samples collected from 6 sugar beet production areas in 2005 and 2006. Flutriafol, mancozeb, and fentin acetate were added to Aspergillus complete medium (ACM) at the rates of 0.0, 0.05, 0.1, 0.5, 1.0, 5.0, and 10.0 µg mL^{-1}, and then mycelial growth was measured. ED_{50} values of flutriafol for all the isolates from the sugar beet production areas ranged from 0.04 to >10.0 µg …

Methyl Bromide Alternatives For Presowing Fumigation In Tobacco Seedling Production, Özhan Boz, Ayhan Yildiz, Kemal Benli̇oğlu, Hati̇ce Seher Benli̇oğlu

Turkish Journal of Agriculture and Forestry

This study aimed to evaluate the effects of soil fumigant alternatives to methyl bromide (MeBr) on the weeds, damping-off, and seedling growth of tobacco. Methyl bromide (90 g m^{-2}), dazomet (D) (50 g m^{-2}), and metam sodium (MS) (100 mL m^{-2}) were evaluated in 2 locations in the Karacasu district of Aydın province, Turkey, February-April 2005. In addition, half doses of D and MS were investigated in 2006. MeBr treatment had 52.5% control against the postemergence damping-off caused by Pythium spp., while alternative treatments had no effect on the disease in 2005. In 2006, MeBr and MS (100 mL m^{-2}) …

The Use Of Artificial Neural Networks For Forecasting The Monthly Mean Soil Temperatures In Adana, Turkey, Mehmet Bi̇lgi̇li̇

Turkish Journal of Agriculture and Forestry

The objective of this paper was to develop an artificial neural network (ANN) model in order to predict monthly mean soil temperature for the present month by using various previous monthly mean meteorological variables. For this purpose, the measured soil temperature and other meteorological data between the years of 2000 and 2007 at Adana meteorological station were used. The soil temperatures were measured at depths of 5, 10, 20, 50, and 100 cm below the ground level by the Turkish State Meteorological Service (TSMS). A 3-layer feed-forward artificial neural network structure was constructed and a back-propagation algorithm was used for …

Determination Of The Effect Of Biodiesel Use On Power Take-Off Performance Characteristics Of An Agricultural Tractor In A Test Laboratory, Ali̇ Aybek, Emrullah Başer, Selçuk Arslan, Mustafa Üçgül

Turkish Journal of Agriculture and Forestry

Tractor performance tests conducted under laboratory test conditions are important because these tests determine the performance characteristics used to compare strengths and weaknesses of tractors. The objective of this study was to determine the effect of diesel fuel (B0) and 3 different biodiesel blends made of canola oil (B10, B20, B30) on tractor power take-off (PTO) performance characteristics. Performance characteristics studied were PTO power, engine torque, engine fuel consumption, and specific fuel consumption on an agricultural tractor (Massey Ferguson 3056 2WD) at the test laboratory of the Directorate of Agricultural Machinery Test Center (TAMTEST), Ministry of Agriculture and Rural Affairs, …

Determination Of Protein And Gluten Quality-Related Parameters Of Wheat Flour Using Near-Infrared Reflectance Spectroscopy (Nirs), Mehmet Başlar, Mustafa Fati̇h Ertugay

Turkish Journal of Agriculture and Forestry

Wet chemistry analyses done for quality control purposes in wheat and flour processing are time-consuming. Near-infrared spectroscopy (NIRS) as an alternative technology to conventional methods allows us to obtain results in a few seconds. In this study, NIRS was used in the development of calibration models for protein, wet and dry gluten contents and Zeleny sedimentation of flours from the grinding of 120 varieties of bread wheat collected from different regions of Turkey. Therefore, spectra in the range of 1100 to 2500 nm of the flours were acquired by scanning with the NIRSystems 6500 monochromator. Multiple linear regression (MLR) and …

Time-Dependent Changes In Distribution Patterns Of Soil Bulk Density And Penetration Resistance In A Rangeland Under Overgrazing, Ekrem Lütfi̇ Aksakal, Taşkin Öztaş, Müdahi̇r Özgül

Turkish Journal of Agriculture and Forestry

High soil bulk density and penetration resistance as an indication of soil compaction affect soil infiltration and runoff. Overgrazed rangelands are under severe erosion risk because of soil compaction. The objective of this study was to determine changes in soil bulk density and penetration resistance in a high altitude rangeland within a 3-month grazing period. A 5-ha rangeland (200 × 250 m) was transected with intervals of 25 × 5 m, and soil penetration resistance was measured at 459 points in the 20-cm surface soil layer on 3 different dates (15 July, 15 August, and 15 September). At each intersection …

Effect Of Mycorrhizal Inoculation On Growth, Nitrogen Fixation, And Nutrient Uptake In Cicer Arietinum (L.) Under Salt Stress, Neera Garg, Shikha Chandel

Turkish Journal of Agriculture and Forestry

Most legumes in natural conditions form a symbiosis with arbuscular mycorrhizal (AM) fungi. AM fungi in saline soils have been reported to improve salinity tolerance and growth in plants. In the present study, interaction between mycorrhizal fungus, Glomus mosseae, and salinity stress in relation to plant growth, nitrogen fixation, and nutrient accumulation was evaluated in Cicer arietinum (L.) (chickpea). Two genotypes of chickpea (Pusa-329, salt tolerant, and Pusa-240, salt sensitive) were compared under different levels of salinity with and without mycorrhizal inoculations. Salt stress resulted in a noticeable decline in shoot and root dry matter accumulation, resulting in a decline …

Effects Of Different Material Coatings On The Wearing Of Plowshares In Soil Tillage, Muammer Nalbant, A. Tufan Palali

Turkish Journal of Agriculture and Forestry

The wearing behavior of coated layers on plowshares used in soil tillage was investigated. Plowshares produced from DIN EN 10 083 (30 MnB5) steel, widely used in plows, were coated with 20 \mum hard chromium by electrolysis method, 20 \mum electro-less nickel by chemical treatments, and 4 \mum titaniumnitride (TiN) by physical vapor deposition to increase wearing resistance. The coated plowshare specimens, together with uncoated plowshare specimens, were mounted on test equipment to analyze their wearing characteristics in a sandy clay loam soil at a speed of 5.8 km h^{-1}. The thickness of the coating and the mass loss of …