Life Sciences Commons^™

Effect Of Sodium Borohydride On Populus Tremula L. Kraft Pulping, Abdullah İstek, İhsan Özkan

Turkish Journal of Agriculture and Forestry

Sodium borohydride (NaBH_4) added kraft pulping was performed using European aspen (Populus tremula L.) chips and the effects of the NaBH_4 addition on the physical and optical properties of pulps and resultant papers were investigated. In order to determine the optimum cooking parameters, 6 different laboratory experiments were carried out, which indicated that 2 cooking conditions were better than the others. The effects of 1%, 2%, and 3% NaBH_4 additions on pulps and paper properties were investigated based on these 2 cooking conditions. It was noted that the increasing level of NaBH_4 added improved the screened pulp yield and pulp …

Isozyme Variation In Four Natural Populations Of Cedrus Libani A.Rich. In Turkey, Yusuf Kurt, Nuray Kaya, Kani̇ Işik

Turkish Journal of Agriculture and Forestry

RT, Nuray KAYA, Kani IŞIK Akdeniz University, Faculty of Arts and Sciences, Biology Department, 07058 Antalya - TURKEY Abstract Genetic variation in 4 natural populations of Cedrus libani A.Rich. was determined using isoenzyme analyses. Isozymes from 12 enzyme systems extracted from haploid female gametophytes of the seeds were separated by horizontal starch gel electrophoresis. In the 12 enzyme systems, 16 loci and 37 alleles were observed. Average proportion of polymorphic loci for the populations ranged from 43.8% to 62.5%. The average number of alleles per locus per population was estimated as 2.0. Mean estimated expected-heterozygosity (He) of the populations was …

The Effect Of Micronutrients In Ensuring Efficient Use Of Macronutrients, Mohammad Jafar Malakouti

Turkish Journal of Agriculture and Forestry

Micronutrient deficiency is widespread in many Asian countries due to the calcareous nature of soils, high pH, low organic matter, salt stress, continuous drought, high bicarbonate content in irrigation water, and imbalanced application of fertilizers. Some of the adverse effects of micronutrient deficiency-induced stress in plants include low crop yield and quality, imperfect plant morphological structure (such as fewer xylem vessels of small size), widespread infestation of various diseases and pests, low activation of phytosiderophores, and lower fertilizer use efficiency. The absence of micronutrient fertilizers results in inadequate absorption of trace elements by plants, which causes substantial yield losses in …

Effect Of Different Planting Dates On Yield And Yield Components Of Peanut (Arachis Hypogaea L.), Öner Canavar, Mustafa Ali̇ Kaynak

Turkish Journal of Agriculture and Forestry

This study was conducted in the experiment fields at the Field Crops Department of the Faculty of Agriculture at Adnan Menderes University in 2004-2005. The experiment was performed in a split-plot design with 3 replications. The goals of this study were to determine the appropriate planting date for peanut under the ecological conditions of Aydın and to investigate the effect of different planting dates on some agronomic traits, yield, and yield components of 3 commercial peanut cultivars (Gazipaşa, Florispan, and NC-7) and the local cultivar. It was determined that the planting date had a statistically significant effect on pod yield, …

Nebraska Timber Buyers

Nebraska Forest Service: Publications

This directory includes active buyers of timber in Nebraska who request to be listed. It was originally developed from a “Timber Buyers Survey” conducted in July, 2001. Corrections/additions are periodically incorporated. Endorsement of listed individuals or firms by the Nebraska Forest Service is not intended or implied. Corrections and/or additions may be submitted to: Marketing & Utilization Forester, Nebraska Forest Service, 109 Plant Industry Building, UNL, Lincoln, NE 68583-0815. Phone: (402)472-5822; FAX: (402) 472-2964, E-mail: dadams2@unl.edu

Chemical Control Of Common Forest And Shade Tree Pests, Mark Harrell, Laurie Stepanek

Nebraska Forest Service: Publications

This information is intended as a guide to the chemical control of common insect pests and diseases of forest and shade trees. This is not a complete list of all pesticides available. Other methods of control that do not involve the use of pesticides may be effective against certain pests and should be considered before a pesticide is used. Trade names have been used for convenience. No endorsement is implied, and no discrimination against similar products not listed is intended. No guarantee of effectiveness is made. Some pesticides may not be appropriate for certain trees or pests or under certain …

Nebraska Timber Industry— An Assessment Of Timber Product Output And Use, 2006, Ronald J. Piva, Dennis Adams

Nebraska Forest Service: Publications

Nebraska’s wood products manufacturing industry employs more than 2,200 workers with an output of approximately $286 million (U.S. Census Bureau 2002). In this bulletin we discuss recent Nebraska forest industry trends and report the results of a detailed study of the forest industry, industrial roundwood production, and associated primary mill wood and bark residue in Nebraska in 2006. Such detailed information is necessary for intelligent planning and decision making in wood procurement, forest resources management, and forest industry development. Likewise, researchers need current forest industry and industrial roundwood information for planning projects.

The last published report from a detailed study …

Timber Talk, Vol. 46, No. 1, February 1, 2008

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News;Hardwood Lumber Price Trends—Green;Hardwood Lumber Price Trends—Kiln Dried;Hardwood Lumber Market History;Hardwood Log Bucking Tips;Do You Know Your True Costs?Controlling Humidity Helps, Helps Increase The Bottom Line;Nebraska Forestry Industry Spotlight;The Trading Post;Timber Sales

Timber Talk, Vol. 46, No. 2, June 1, 2008

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; Softwood Lumber Price Trends; Experts: Price for Sawdust Has Doubled; One Man With a Wood-Mizer; Food for Thought; Updated Information Regarding Mosquito Repellents — May 7, 2008; Nebraska Forestry Industry Spotlight; The Trading Post; Timber Sales; Coming Events

Evaluating Forest Harvesting To Reduce Its Hydrologic Impact With A Spatial Decision Support System, Yanli Zhang, P. K. Barten, Ramanathan Sugumaran

Faculty Publications

Timber harvesting changes the condition of forest ecosystems, which are a major influence on the characteristics of headwater streams. Such characteristics include the quantity and timing of base flow and storm flow, concentrations of sediment and dissolved nutrients, water temperature, and the stability of the stream channels. This paper explores previous studies dealing with the relationship between timber harvesting and its hydrologic effects, especially long term water yield increase. The watershed disturbance threshold theory is raised and investigated in detail. The development and evaluation of a spatial decision support system, the Harvest Schedule Review System (HSRS), is then described. The …

Using Dendrochronology To Understand The Response Of Eastern Hemlock To Past Stresses And Its Current Status In Southern Maine, Sophia Demaio

Electronic Theses and Dissertations

Eastern hemlock (Tsuga canadensis (L.) Carr.) is an ecologically important species that is threatened across its range by the non-native hemlock woolly adelgid (HWA, Adelges tsugae (Annand) (Hemiptera: Adelgidae)). In order to understand potential impacts of HWA in southern Maine, we conducted a treering study of 36 sites in southern Maine (York and Cumberland counties) to evaluate how stress events affected eastern hemlock increments, especially after the 1999-2002 drought. The primary objectives were to: 1) create a master chronology and identify reduced growth events 2) model abiotic factors associated with differences in drought response among plots and 3) evaluate the …

The Role Of Spiders In The Detrital Food Web Of An Eastern Deciduous Forest, Erin Elizabeth Hladilek

University of Kentucky Doctoral Dissertations

Historically, terrestrial food web research has focused on describing the structure of aboveground grazing webs, and determining how interactions among plants, herbivores and higher trophic levels influence primary productivity. Detrital food webs however, play a significant role in regulation of ecosystem dynamics through direct impacts on decomposition. Unraveling the complex nature of detrital food web structure is critical to developing a better understanding of ecosystem function. Therefore the primary objective of this research was to describe the structure of the leaf-litter food web in a temperate deciduous forest, with emphasis on interactions between a community of generalist predators, the forest-floor …

N-Transfer Through Aspen Litter And Feather Moss Layers After Fertilization With Ammonium Nitrate And Urea, N A. Startsev, V J. Lieffers, S M. Landhausser, A Velazquez-Martinez

Aspen Bibliography

When fertilizer is broadcast in boreal forest stands, the applied nutrients must pass through a thick layer of either feather moss or leaf litter which covers the forest floor. In a growth chamber experiment we tested the transfer of N through living feather moss or aspen litter when fertilized with urea ((NH2)2CO) or NH4NO3 at a rate of 100 kg ha−1 and under different watering regimes. When these organic substrates were frequently watered to excess they allowed the highest transfer of nutrients through, although 72% of the applied fertilizer was captured in the substrates. In a field experiment we also …

The Dandy Scroll, Winter 2008, University Of Maine Pulp And Paper Foundation

General University of Maine Publications

The Winter 2008 issue of The Dandy Scroll newsletter produced by the University of Maine Pulp and Paper Foundation.

Climate Change, Vulnerability And Adaptation For South-West Western Australia: Phase One Of Action 5.5, Western Australian Greenhouse Strategy, Luke Morgan, Jo Anne Molin, Ross George, Richard Mckellar, Janet Conte

Bulletins 4000 -

This report outlines preliminary findings about the impacts of climate changes that occurred during 1975 to 2005 on the South West’s people, its economy and natural ecosystems. The report focuses on vulnerability and adaptation, identifying useful pointers for future work, particularly in relation to how well the community, stakeholders and decision-makers understand climate change as an issue and a threat.

Does Moose Browsing Threaten European Aspen Regeneration In Koli National Park, Finland?, Sauli Harkonen, Kalle Eerikainen, Riikka Lahteenmaki, Risto Heikkila

Aspen Bibliography

Large European aspen (Populus tremula) trees host hundreds of species of which many are threatened species of conifer-dominated, old-growth boreal forests. Aspen is also one of the deciduous tree species most intensively used by moose (Alces alces) in Finland. In conservation areas aspen regeneration is facilitated by large-scale disturbances, especially fires and windstorms, and also by mortality of individual trees and small-scale disturbances that create small openings. These aggregated patches of young aspens provide high quality feeding sites for moose. In Finland, it has been hypothesized that intense browsing pressure by moose on aspen may prevent new aspen cohorts from …

Validation Case Study : Treatment Effectiveness In Aspen Vegetation Type : A Comparison Of Two Types Of Treatments On The Manti-La Sal National Forest, Diane M. Cote

Aspen Bibliography

No abstract provided.

Drought Traits Of Eucalyptus Gomphocephala In Yalgorup National Park, Paul L. Drake

Theses: Doctorates and Masters

Isohydric and anisohydric regulation of plant water status has been observed over several decades of field, glasshouse and laboratory studies, yet the functional significance and mechanism of both remain obscure. W e studied the seasonal trends in plant water status and hydraulic properties in a natural stand of Eucalyptus gomphocephala through cycles of varying environmental moisture (rainfall, groundwater depth, evaporative demand ) in order to test for isohydry and to provide physiological information for the mechanistic interpretation of seasonal trends in plant water status. Over a 16-month period of monitoring, spanning two summers, midday leaf water potential correlated with pre-dawn …

A Unique Old-Growth Ponderosa Pine Forest In Northern Arizona, Scott R. Abella

Public Policy and Leadership Faculty Publications

Old-growth ponderosa pine (Pinus ponderosa) forests are uncommon in the Southwest, and only one oldgrowth forest (the Gus Pearson Natural Area [GPNA]) has been researched in the ponderosa pine belt surrounding the city of Flagstaff in northern Arizona. The purpose of this study was to measure soil characteristics, current and pre-Euro-American settlement (1885) tree structure, and understory plant composition in a 6-ha remnant old-growth forest on volcanic, red cinder soils. Soil bulk density was extremely low (0.21 Mg/m3) in this forest because of high volumetric contents of cinders >2 mm diameter. As a result, volumetric soil moisture, organic C, and …

Prescribed Fire, Snag Population Dynamics, And Avian Nest Site Selection, Karen Bagne, Kathryn Purcell, John T. Rotenberry

Karen Bagne

No abstract provided.