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2009

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Articles 421 - 440 of 440

Full-Text Articles in Forest Sciences

Timber Talk, Vol. 47, No. 3, September 1, 2009 Jan 2009

Timber Talk, Vol. 47, No. 3, September 1, 2009

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News ; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; Softwood Lumber Price Trends; Timber Stumpage Prices; Logger Safety Training Sept. 5; Nebraska Timber Industry; Nebraska Wood Waste; Nebraska Forestry Industry Spotlight; Timberland Investment Outputs; The Trading Post.

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Timber Talk, Vol. 47, No. 4, November 1, 2009 Jan 2009

Timber Talk, Vol. 47, No. 4, November 1, 2009

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News ; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; Softwood Lumber Price Trends; Know the Value of Your Logs; Biomass Crop Assistance Program; Carbon Credits: A New Forest Income Source; Nebraska Forestry Industry Spotlight; Woody Biomass Raw Materials and Markets; The Trading Post.

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Aspen Regeneration On Log Decking Areas As Influenced By Season And Duration Of Log Storage, Kevin N. Renkema, Victor J. Lieffers, Simon M. Landhausser Jan 2009

Aspen Regeneration On Log Decking Areas As Influenced By Season And Duration Of Log Storage, Kevin N. Renkema, Victor J. Lieffers, Simon M. Landhausser

Aspen Bibliography

This study assessed aspen regeneration on decking areas as affected by season of log deck building and duration of log storage; as well as root wounding, soil com- paction, and slash depth. On former decking areas that were built after a summer harvest, aspen regeneration was 50% lower and root death 35% greater compared to former decking areas of a fall harvest. Duration of log storage after a fall harvest had little effect on aspen regeneration; short (1.5–3 months) or long (11 months) storage resulted in similar regeneration. Slash load was greatly increased on decking areas while root wounding and …

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Reproduction And Survival Of Overwintered And F_1 Generation Of Two Egg Parasitoids Of Sunn Pest, Eurygaster Integriceps Put. (Heteroptera: Scutelleridae), Şener Tarla, Serpi̇l Kornoşor Jan 2009

Reproduction And Survival Of Overwintered And F_1 Generation Of Two Egg Parasitoids Of Sunn Pest, Eurygaster Integriceps Put. (Heteroptera: Scutelleridae), Şener Tarla, Serpi̇l Kornoşor

Turkish Journal of Agriculture and Forestry

The differences in the reproductive biology of overwintered (OW) and F_1 generation of Trissolcus semistriatus Nees and T. festivae Victorov (Hymenoptera: Scelionidae) were investigated under laboratory conditions. The experiments were conducted to evaluate oviposition period, lifetime fecundity, female progeny, sex ratio, and longevity of OW and F_1 generation with the two species as factors. The results of this study showed that the oviposition period of F_1 generation was longer than that of OW females for both of the two parasitoid species. With the exception of F_1 generation of T. festivae, the highest daily average progeny production of females was recorded …

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Multiple Resistance, Detoxifying Enzyme Activity, And Inheritance Of Abamectin Resistance In Tetranychus Urticae Koch (Acarina: Tetranychidae), Si̇bel Yorulmaz, Recep Ay Jan 2009

Multiple Resistance, Detoxifying Enzyme Activity, And Inheritance Of Abamectin Resistance In Tetranychus Urticae Koch (Acarina: Tetranychidae), Si̇bel Yorulmaz, Recep Ay

Turkish Journal of Agriculture and Forestry

The present study investigated the biochemical mechanism of abamectin resistance in a Tetranychus urticae Koch population collected from a bean greenhouse (BEYO 2) in Beyobası village in Gazipaşa district, Antalya province, and maintained in the laboratory. LC_{50, 60, 90} levels of BEYO 2 population of T. urticae were determined using a dry film method. The LC50 level of the BEYO 2 strain with abamectin was selected 15 times and was increased from 2.42 µL 100 mL^{-1} water to 38.67 µL 100 mL^{-1} water. A selected strain showing 35.05-fold resistance was named ABA 15 strain. It was investigated whether the resistant …

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A New Entomopathogenic Nematode Species For Turkey, Heterorhabditis Megidis Poinar, Jackson & Klein 1987 (Rhabditida: Heterorhabditidae), Hüseyi̇n Yilmaz, Lieven Waeyenberge, İsmai̇l Demi̇r, Maurice Moens, Zi̇hni̇ Demi̇rbağ Jan 2009

A New Entomopathogenic Nematode Species For Turkey, Heterorhabditis Megidis Poinar, Jackson & Klein 1987 (Rhabditida: Heterorhabditidae), Hüseyi̇n Yilmaz, Lieven Waeyenberge, İsmai̇l Demi̇r, Maurice Moens, Zi̇hni̇ Demi̇rbağ

Turkish Journal of Agriculture and Forestry

During a survey on the occurrence of entomopathogenic nematodes (EPNs) in the Eastern Black Sea region of Turkey, a heterorhabditid species was isolated using the Galleria-baiting technique. Based on morphology and morphometrics, the isolate was identified as Heterorhabditis megidis. Sequences of the ITS region of its rDNA confirmed this identification. The species is recorded for the first time from Turkey. A more intensive survey to determine the distribution of this species, covering all parts of the Black Sea region of Turkey, is currently underway.

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The Relationship Between The Form Of Dead Bark And Lignin Content In Scots Pine (Pinus Sylvestris L.), Tomasz Jelonek, Witold Pazdrowski, Magdalena Arasimowicz-Jelonek, Jaroslaw Gzyl, Arkadiusz Tomczak, Jolanta Floryszak-Wieczorek Jan 2009

The Relationship Between The Form Of Dead Bark And Lignin Content In Scots Pine (Pinus Sylvestris L.), Tomasz Jelonek, Witold Pazdrowski, Magdalena Arasimowicz-Jelonek, Jaroslaw Gzyl, Arkadiusz Tomczak, Jolanta Floryszak-Wieczorek

Turkish Journal of Agriculture and Forestry

In this study the proportion of lignin in wood tissue was analysed in 36 Scots pines differing in their form of dead bark. Material for analyses came from pure pine stands aged 89-91 years located in northern Poland. Chemical analyses were performed in the mature wood zone comprising the last 10 diameter increments located at a height of 1.3 m (DBH). Results indicate differences in lignin content and growth rate in pines whose stems were characterized by different forms of dead bark. The study showed significant differences in lignin contents between trees with shell and scaly dead bark and trees …

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Putative Agents Of Fig Mosaic Disease In Turkey, Kadri̇ye Çağlayan, Vicente Medina, Mona Gazel, Çi̇ğdem U. Serçe, Luis Serrano, Angeles Achon, Soner Soylu, Oğuzhan Çalişkan, Mustafa Gümüş Jan 2009

Putative Agents Of Fig Mosaic Disease In Turkey, Kadri̇ye Çağlayan, Vicente Medina, Mona Gazel, Çi̇ğdem U. Serçe, Luis Serrano, Angeles Achon, Soner Soylu, Oğuzhan Çalişkan, Mustafa Gümüş

Turkish Journal of Agriculture and Forestry

Leaves from 58 fig tree accessions showing different severity of mosaic and necrotic symptoms were collected in 2 different regions of Turkey and analysed by transmission electron microscope (TEM) and RT-PCR to determine putative causal agents of fig mosaic disease (FMD). Ultrastructural studies showed that double membrane-bound bodies (DMBs) were mainly observed in the parenchyma and mesophyll cells of infected leaves of the cultivars Göklop and Morgüz and some seedlings showing only mosaic symptoms. These bodies were surrounded by a fibrillar matrix in most of the infected cells. Long, flexuous rod-shaped virus-like particles (LFPs) were also observed in vascular tissues …

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Variability In Wheat Yield Under Yellow Rust Pressure In Pakistan, Sajid Ali, Syed Jawad Ahmed Shah, Hidayat-Ur Rahman, Muhammad Shahab Saqib, Muhammad Ibrahim, Muhammad Sajjad Jan 2009

Variability In Wheat Yield Under Yellow Rust Pressure In Pakistan, Sajid Ali, Syed Jawad Ahmed Shah, Hidayat-Ur Rahman, Muhammad Shahab Saqib, Muhammad Ibrahim, Muhammad Sajjad

Turkish Journal of Agriculture and Forestry

Wheat yield of 37 wheat varieties along with a susceptible check, Morocco, was studied under yellow rust pressure across 3 locations of North West Frontier Province (NWFP), Pakistan during 2007. Considerable high disease pressure, as revealed by yellow rust severity, was observed at all locations with the maximum (100%) at Cereal Crop Research Institute (CCRI), Nowshera. Disease severity ranged from 0% to 70% for the tested varieties while reached 100% for Morocco with S type of host response. We report the presence of sufficient variability across locations for both yield potential and yellow rust severity. Locations with maximum disease pressure …

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Determination Of Pathogenic Variability Of Didymella Rabiei, The Agent Of Ascochyta Blight Of Chickpea In Turkey, Muharrem Türkkan, F. Sara Dolar Jan 2009

Determination Of Pathogenic Variability Of Didymella Rabiei, The Agent Of Ascochyta Blight Of Chickpea In Turkey, Muharrem Türkkan, F. Sara Dolar

Turkish Journal of Agriculture and Forestry

Pathogenic characterization of 64 Didymella rabiei isolates obtained from 5 different regions in Turkey was determined with a set of 7 different chickpea cultivars (ILC 1929, F8, ICC 1903, ILC 249, ILC 482, ILC 3279, and ICC 3996). All the isolates were classified into both 3 pathotypes and 6 physiological races. Of the isolates used in this study, it was determined that 38 (59.4%) belonged to pathotype I, 3 (4.7%) to pathotype II, and 23 (35.9%) to pathotype III. Pathotypes I and III were determined in 5 regions of Turkey including the Mediterranean, Aegean, Southeastern Anatolia, Central Anatolia, and Black …

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The Influence Of Hot Water Extraction On Physical And Mechanical Properties Of Osb, Juan Jacobo Paredes Heller Jan 2009

The Influence Of Hot Water Extraction On Physical And Mechanical Properties Of Osb, Juan Jacobo Paredes Heller

Electronic Theses and Dissertations

The finite reserves of petroleum are driving renewed interest in technologies that allow for sustainable production of energy. There are a wide variety of technologies with well-developed infrastructure like the oriented strand board (OSB) industry, which could be used as launch point for developing biorefineries. The effects of hot water extraction (HWE) on two hardwood species (Acer rubrum, Populus tremuloides) and softwood species (mixture of southern yellow pine, Tsuga canadensis) were studied. The HWE resulted in a weight loss (WL) that increased as the severity factor (SF) was extended. Hardwood had the biggest WL values at equivalent extraction conditions. The …

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Aspen Succession And Nitrogen Loading: A Case For Epiphytic Lichens As Bioindicators In The Rocky Mountains, Usa, Paul C. Rogers, Kori D. Moore, Ronald J. Ryel Jan 2009

Aspen Succession And Nitrogen Loading: A Case For Epiphytic Lichens As Bioindicators In The Rocky Mountains, Usa, Paul C. Rogers, Kori D. Moore, Ronald J. Ryel

Wildland Resources Faculty Publications

Question: Can lichen communities be used to assess shortand long-term factors affecting seral quaking aspen (Populus tremuloides) communities at the landscape scale? Location: Bear River Range, within the Rocky Mountains, in northern Utah and southern Idaho, USA. Method: Forty-seven randomly selected mid-elevation aspen stands were sampled for lichens and stand conditions. Plots were characterized according to tree species cover, basal area, stand age, bole scarring, tree damage, and presence of lichen species. We also recorded ammonia emissions with passive sensors at 25 urban and agricultural sites throughout an adjacent populated valley upwind of the forest stands. Nonmetric multidimensional scaling (NMS) …

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The Influences Of Conventional And Low Density Thinning On Leaf Area, Growth, And Growing Space Relationships Of Eastern White Pine (Pinus Strobus L.), Christopher Henry Guiterman Jan 2009

The Influences Of Conventional And Low Density Thinning On Leaf Area, Growth, And Growing Space Relationships Of Eastern White Pine (Pinus Strobus L.), Christopher Henry Guiterman

Electronic Theses and Dissertations

Despite the commercial importance and widespread management of eastern white pine {Pinus strobus L.) in the Northeast, surprisingly little is known about the effects of thinning on even-aged stand development. To address this, patterns of leaf area, bole form, volume growth, and growth efficiency - defined as volume increment per unit leaf area - were examined over a 17-year period within a thinning study in central Maine designed to compare the conventional B-line and low density thinning regimes. At the tree-level, many of the effects of thinning were as expected. Heavier, low density thinning resulted in significantly larger and deeper …

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Soil Amino Acids At Upper Tree Line, Montane And Lower Tree Line, Kelly C. Owens Jan 2009

Soil Amino Acids At Upper Tree Line, Montane And Lower Tree Line, Kelly C. Owens

Electronic Theses and Dissertations

The classic view of the nitrogen cycle in soils is for plants to take up inorganic N in solution for N nutrition. More recent studies reveal plants can take up low molecular weight dissolved organic N such as amino acids directly from the soil. In ecosystems where the rate of microbial mineralization is limited, plants may take up 10 to 200 percent more amino acid N than mineral N. It is not known if plants take up amino acids in all ecosystems, however recent research shows that plants generally take up amino acids when they are present in high quantities …

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An Aspen Success Story : 2009 Aspen Monitoring Report, James L. Robertson Jan 2009

An Aspen Success Story : 2009 Aspen Monitoring Report, James L. Robertson

Aspen Bibliography

No abstract provided.

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The Effects Of Roads On Space Use And Movements Of Black Bears In Eastern Kentucky, Rebekah A. Jensen Jan 2009

The Effects Of Roads On Space Use And Movements Of Black Bears In Eastern Kentucky, Rebekah A. Jensen

University of Kentucky Master's Theses

Kentucky, USA, is the site of recent natural recolonization by the American black bear (Ursus americanus); however, bears are rarely observed outside the Cumberland Mountains along the state‘s southeastern border. I examined the influence of roads in constraining the distribution of this population by altering animal space use and movement. I identified patterns of road avoidance and road crossing using data from Global Positioning System collars worn by 28 adult bears (16M, 12F), and described road mortality trends using 27 roadkill events. Bears avoided roads at the home range and landscape scale, primarily crossed low-traffic roads, and crossed …

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The Dandy Scroll, Winter 2009, University Of Maine Pulp And Paper Foundation Jan 2009

The Dandy Scroll, Winter 2009, University Of Maine Pulp And Paper Foundation

General University of Maine Publications

The Winter 2009 issue of The Dandy Scroll newsletter produced by the University of Maine Pulp and Paper Foundation.

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Assessing Aspen Using Remote Sensing, Randy Hamilton, Kevin Megown, Jeff Dibenedetto, Dale Bartos, Anne Mikeck Jan 2009

Assessing Aspen Using Remote Sensing, Randy Hamilton, Kevin Megown, Jeff Dibenedetto, Dale Bartos, Anne Mikeck

Aspen Bibliography

Large areas of aspen (Populus tremuloides) have disappeared and continue to disappear from western forests due to successional decline and sudden aspen decline (SAD). This loss of aspen ecosystems negatively impacts watersheds, wildlife, plants, and recreation. Much can still be done to restore aspen if timely and appropriate action is taken. However, land managers often lack fundamental information on the location, quantity, and status of aspen stands. This information is needed to plan, implement, and defend aspen restoration activities, but it is often difficult and costly to obtain. Advances in remote sensing technologies can provide cost-effective ways to obtain spatial …

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2009 Report : A Multi-Refuge Program To Evaluate The Effect Of Ungulate Browsing On Habitat, Richard B. Keigley, Jeffrey Warren, Wayne J. King Jan 2009

2009 Report : A Multi-Refuge Program To Evaluate The Effect Of Ungulate Browsing On Habitat, Richard B. Keigley, Jeffrey Warren, Wayne J. King

Aspen Bibliography

No abstract provided.

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Status And Trends Of Wind Energy Development - Fact Sheet, Erik Edward Nordman Dec 2008

Status And Trends Of Wind Energy Development - Fact Sheet, Erik Edward Nordman

Erik Edward Nordman

The West Michigan Wind Assessment project team is comprehensively analyzing the benefits and challenges of wind energy development in coastal West Michigan, including Oceana, Muskegon, Ottawa and Allegan counties. This fact sheet summarizes the findings of their first report, Status and Trends of Wind Energy Development in West Michigan. Additional reports will examine potential impacts from a variety of perspectives and evaluate policy options for minimizing conflicts. For more information or to access the full report, please visit the project web site: www.gvsu.edu/wind.

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