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2001

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Articles 121 - 141 of 141

Full-Text Articles in Forest Sciences

Determination Of Some Alpine Plants Suitable For Landscape Planning In Erzurum And Surroundings, Fari̇s Karahan, Hasan Yilmaz Jan 2001

Determination Of Some Alpine Plants Suitable For Landscape Planning In Erzurum And Surroundings, Fari̇s Karahan, Hasan Yilmaz

Turkish Journal of Agriculture and Forestry

In this study, it was intended to determine the usage possibilites of some alpine plant species having high potential value as ornamental plants for landscape planning in Erzurum and environs. The investigation was conducted in 15 locations of 1750-3176 m altitudes between May 1997 and September 1998. In the study, direct plant observation methods were employed as well as floristic plant analysis. The results showed that 166 alpine plant species were found belonging 32 families and useful for landscape planning. Among these plant species 14 for water gardens, 20 for roof and terrace gardens, 32 for dry wall and rock …

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A Study On The Adaptations Of Some Natural Ground Cover Plants And On Their Implications In Landscape Architecture In The Ecological Conditions Of Trabzon, Cengi̇z Acar, Mustafa Var Jan 2001

A Study On The Adaptations Of Some Natural Ground Cover Plants And On Their Implications In Landscape Architecture In The Ecological Conditions Of Trabzon, Cengi̇z Acar, Mustafa Var

Turkish Journal of Agriculture and Forestry

In this research, the adaptation and ground cover properties of some plants with aesthetic and functional features, found in the natural flora of the province of Trabzon, were investigated. Nineteen different natural ground cover plants from 8 families were chosen as trial plant material. These materials, which were mostly from the alpine zone, were planted as plugs in 1994. Survival rates and plant cover area were recorded and measured at the beginning of the vegetation season, during flowering, and at the end of the vegetation season in 1995 and 1996. Moreover, observations were made on some of the morphological properties …

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Effects Of Different Irrigation Programs On The Growth Of Cotton Under Drip Irrigation, Ahmet Ertek, Riza Kanber Jan 2001

Effects Of Different Irrigation Programs On The Growth Of Cotton Under Drip Irrigation, Ahmet Ertek, Riza Kanber

Turkish Journal of Agriculture and Forestry

This study was conducted to determine of effects the cotton plant growth of different irrigation programs in a drip system. The amount of water applied was based on free surface evaporation from a screened Class-A Pan. Irrigation treatments consisted of two different irrigation intervals (I1: 5; I2: 10 days), and three plant-pan coefficients (Kcp1: 0.75; Kcp2: 0.90 and Kcp3: 1.05) and two different wetted percentages (P1: 0.70 and P2: based on cover percentage of the crop). The first irrigation was applied when the available soil moisture in the 120 cm depth in the profile was at 40%. According to the …

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Species And Ecosystem Conservation: An Interdisciplinary Approach, Tim W. Clark, Michael J. Stevenson, Kim Ziegelmayer Jan 2001

Species And Ecosystem Conservation: An Interdisciplinary Approach, Tim W. Clark, Michael J. Stevenson, Kim Ziegelmayer

Yale School of the Environment Bulletin Series

No abstract provided.

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A Chorological Study On The Taxa Naturalized In The Eastern Black Sea Region, Sali̇h Terzi̇oğlu, Rahi̇m Anşi̇n Jan 2001

A Chorological Study On The Taxa Naturalized In The Eastern Black Sea Region, Sali̇h Terzi̇oğlu, Rahi̇m Anşi̇n

Turkish Journal of Agriculture and Forestry

Diaspores of taxa with large ecological tolerance can be easily carried between continents and some of these taxa become an important factor, threatening the maintenance of plant species diversity, in addition to other factors, such as clear-cutting, over-grazing and dwellings. Chorological study is an important step for conserving plant species diversity, and it provides information about naturalized plant taxa that have migrated from one continent to others. Presenting the floristic relationships between the continents is important for plant geography and paleobotany. The chorological features of 32 taxa of flowering plants belonging to 14 families, naturalized in the Eastern Black Sea …

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A Study On Turkish Rhododendron L. (Ericaceae), Sali̇h Terzi̇oğlu, Nesi̇me Merev, Rahi̇m Anşi̇n Jan 2001

A Study On Turkish Rhododendron L. (Ericaceae), Sali̇h Terzi̇oğlu, Nesi̇me Merev, Rahi̇m Anşi̇n

Turkish Journal of Agriculture and Forestry

Some of the Turkish Rhododendron L. taxa need wood anatomical and palynological studies for their certain determination together with morphological studies. Therefore, some of them were studied and a revised list of them is given. New distribution areas of a newly recorded endemic variety of Rhododendron ponticum L. (Rhododendron ponticum L. subsp. ponticum var. heterophyllum Anşin) were determined: A7 Trabzon: Maçka, A8 Rize: Çamlıhemşin and A8 Artvin: Murgul, in addition to the already known A8 Trabzon: Of region. Morphological, wood anatomical and palynological features of very rare white-flowered specimens of Rhododendron ponticum L. were compared to the main taxa of …

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Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta Jan 2001

Evaluation Of Some Chemical Extraction Methods Used As Indices Of Soil Nitrogen Availability In Polatlı State Farm Soils In Ankara Province, Abdel Karim Hassan Awad Elkarim, Sadik Usta

Turkish Journal of Agriculture and Forestry

In pursuit of evaluating the suitability of methods for determining the ability of soils to supply available nitrogen under different soil conditions, two biological aerobic and anaerobic incubation procedures and six chemical extraction methods were applied to 31 samples of soil collected from the Central Anatolian area. The selected area for the study represents the criteria of arid and semi-arid regions. Statistically significant correlation coefficients were found between the biological methods and the five chemical methods that were evaluated out of the six. Only the alkaline KMnO_4 method did not give a significant correlation cofficient. The results of the phosphate-borate …

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A Study On Selecting Suitable Types Of The Anatolia Sage (Salvia Fruticosa Mill.) In The Flora Of Western Anatolia, Emi̇ne Bayram Jan 2001

A Study On Selecting Suitable Types Of The Anatolia Sage (Salvia Fruticosa Mill.) In The Flora Of Western Anatolia, Emi̇ne Bayram

Turkish Journal of Agriculture and Forestry

In this study, Salvia fruticosa Mill. seeds were collected from different locations in west and south-west Anatolia, Turkey, to establish a population. This population was grown under the Bornova ecological conditions for determination of agronomical and technological traits in order to develop a standard variety by selecting the types with better quality and yield using the clonal selection method. The population included the seeds collected from seventeen different locations in the provinces of Muğla, Antalya, İzmir, Aydın, Tekirdağ, Çanakkale and Balıkesir. Plant height, the yields of fresh herbage, drug herbage, drug leaf and essential oil content for each population in …

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Research On The Effects Of Different Phosphorus Doses On Root, Nodule And Plant Growth In Some Vetch Species, Yaşar Karadağ, Uğur Büyükburç Jan 2001

Research On The Effects Of Different Phosphorus Doses On Root, Nodule And Plant Growth In Some Vetch Species, Yaşar Karadağ, Uğur Büyükburç

Turkish Journal of Agriculture and Forestry

This research was conducted to determine the effects of different phosphorus doses (0, 4, 8 and 12 kg P_2O_5/da) on root, above-ground biomass and nodule development of vetch species (Vicia villosa Roth., V. pannonica Crantz. and V. sativa L.) in the experimental field of the Agricultural Faculty of Gaziosmanpaşa University in the 1997-98 growing season. Common vetch had the highest above-ground biomass, number of nodules on the lateral roots and total nodule number, whereas Hungarian vetch had the highest root biomass, number of nodules on the main root and nodule dry weight. Phosphorus fertilization enhanced all the parameters investigated. It …

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Physical And Chemical Characteristics Of Taro [Colocasia Esculenta (L.) Schott] Corms And Processing To Chips And Puree, Mevlüt Şen, Atti̇la Akgül, Musa Özcan Jan 2001

Physical And Chemical Characteristics Of Taro [Colocasia Esculenta (L.) Schott] Corms And Processing To Chips And Puree, Mevlüt Şen, Atti̇la Akgül, Musa Özcan

Turkish Journal of Agriculture and Forestry

This study was carried out to establish some physical properties and proximate chemical compositions of taro corms collected from Anamur and Bozyazı in İçel province, Turkey. A total of two taro corms from different sources were evaluated for pH, dry matter, crude protein, crude cellulose unrefined oil, starch, invert sugar, total sugar, ash, Ca, Mg ve K. French fries produced from the corms were evaluated on composition and sensory properties. The samples collected from Anamur and Bozyazı differed in some parameters. Taro corms were rich in starch, magnesium and potassium. Sensory analysis of the products showed no difference between the …

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Effects Of Bleaching And Impregnation Processes On The Hardness Of The Varnish Layer In Beech Wood, Yalçin Örs, Musa Atar Jan 2001

Effects Of Bleaching And Impregnation Processes On The Hardness Of The Varnish Layer In Beech Wood, Yalçin Örs, Musa Atar

Turkish Journal of Agriculture and Forestry

This study was performed to determine the effects of bleaching and impregnation processes on the hardness of the varnish layer in beech wood. For this purpose, samples were impregnated with Tanalith-CBC and Immersol-WR 2000 and bleached with the solution groups (18%) NaOH+H_2O_2, NaOH+ Ca(OH)_2 +H_2O_2, NaOH+ MgSO_4+ H_2O_2, NaHSO_3+H_2C_2O_4.2H_2, NaSiO_3 +H_2O_2, KMnO_4 +NaHSO_3+H_2O_2. Synthetic varnishing was used and the hardness of the varnish layer was determined according to ASTM-D-4366. The mean hardness values (swing) of the control samples were found to be 35.57 for unimpregnated and varnished samples, 23.50 for samples treated with solution groups and varnished samples, 45.78 for …

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An Evapotranspiration Model For Nursery Plants Grown In A Lysimeter Under Field Conditions, Hali̇l Kirnak, Ted Henry Short Jan 2001

An Evapotranspiration Model For Nursery Plants Grown In A Lysimeter Under Field Conditions, Hali̇l Kirnak, Ted Henry Short

Turkish Journal of Agriculture and Forestry

A modified combination model that used ambient temperature,relative humidity,solar radiation,air velocity and leaf area index (LAI) as inputs was developed for nursery plants, and its prediction was compared to the measured ET of the plant. A nursery plant of red maple (Acer rubrum) grown in a lysimeter under field conditions was used to test it. This modified combination model was shown to accurately estimate the evapotranspiration (ET) of a potted red maple (R^2=0.79). The most significant driving parameters for ET were solar radiation level and vapor pressure deficit (VPD). An exponential relationship between stomatal resistance and solar radiation for red …

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Effect Of Boron Application On The Yield And Quality Of Sugar Beet, Sai̇t Gezgi̇n, Mehmet Hamurcu, Mustafa Apaydin Jan 2001

Effect Of Boron Application On The Yield And Quality Of Sugar Beet, Sai̇t Gezgi̇n, Mehmet Hamurcu, Mustafa Apaydin

Turkish Journal of Agriculture and Forestry

This research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altınekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil + leaf, seed + leaf). The results showed that the root yield and refined sugar yield …

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Some Mechanical Properties Of Alder [Alnus Glutinosa Subsp. Barbata (C. A. Mey.) Yalt.] Wood Obtained From Artvin Region, Bi̇lgi̇n Güller, Nurgül Ay Jan 2001

Some Mechanical Properties Of Alder [Alnus Glutinosa Subsp. Barbata (C. A. Mey.) Yalt.] Wood Obtained From Artvin Region, Bi̇lgi̇n Güller, Nurgül Ay

Turkish Journal of Agriculture and Forestry

In this study, some mechanical properties of Alder [Alnus glutinosa subsp. barbata (C. A. Mey.) Yalt.] wood were investigated. The experiments were carried out on test specimens obtained from 10 selected experimental trees taken from Artvin region. The selection of the experimental trees, preparation of the test specimens and application of the test procedures were carried out according to the relevant Turkish standards. Some mechanical properties of Alder wood such as compression strength parallel to grain, static bending strength, modulus of elasticity, impact strength (impact bending), tension strength parallel to grain, shear strength, cleavage strength and values of Brinell-hardness were …

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In Vitro Plantlet Regeneration From Mature Embryos Of Linden (Tilia Platyphyllos Scop.) And Multiplication Of Its Buds, Ali̇ Ömer Üçler, Nuray Mollamehmetoğlu Jan 2001

In Vitro Plantlet Regeneration From Mature Embryos Of Linden (Tilia Platyphyllos Scop.) And Multiplication Of Its Buds, Ali̇ Ömer Üçler, Nuray Mollamehmetoğlu

Turkish Journal of Agriculture and Forestry

In this study, the effects of different sucrose, BAP and Kinetin concentrations in MS medium on plantlet formation, bud formation on the plantlets and development of embryos isolated from the seeds of Tilia platyphyllos under in vitro conditions were investigated. In addition, the effects of different culture times on the development of embryos and plantlet formation were studied. The results indicated that the cultured embryos on the media supplemented with sucrose (10, 20, 30, 40, 50 and 60 g/l) developed plantlets with epicotyls and roots. The best results were obtained on the medium supplemented with 30 g/l of sucrose. Epicotyls …

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Combinatorial Optimization In Forest Ecosystem Management Modeling, Emi̇n Zeki̇ Başkent Jan 2001

Combinatorial Optimization In Forest Ecosystem Management Modeling, Emi̇n Zeki̇ Başkent

Turkish Journal of Agriculture and Forestry

Modeling forest management activities has been tackled by scientists over the last two decades. Both simulation and optimization techniques have been used in solving forest management planning problems. With the introduction of ecosystems management that focuses on the sustainable production and maintenance of ecological, social and economical values, neither approach provided a credible solution technique to help design the complex structure of forest management activities. Alternative to these, is a group of meta-heuristic or combinatorial optimization techniques which have just gained the attention of forest modelers. In this paper, an attempt is made to introduce the concept of combinatorial optimization, …

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The Determination Of Some Physical Properties Of Beech Wood (Fagus Orientalis Lipsky.) In The Andırın Region, İbrahi̇m Bektaş, Cengi̇z Güler Jan 2001

The Determination Of Some Physical Properties Of Beech Wood (Fagus Orientalis Lipsky.) In The Andırın Region, İbrahi̇m Bektaş, Cengi̇z Güler

Turkish Journal of Agriculture and Forestry

The main aim of this study was to determine some physicals properties of the beech wood (Fagus orientalis Lipsky.) naturally growing in the Andırın region (the East Mediterranean region), and compare these properties with those of beech wood growing in the Black Sea region. The physical properties investigated were air and oven-dry density, basic density value, tangential, radial, longitudinal and volumetric shrinkage and swelling. The tests of the physical properties were performed on small clean specimens of beech wood selected from the most suitable stands by following the conventional methods. The average air-dry density, oven-dry density, basic density value, volumetric …

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Effect Of Glucosidases Enzyme Treatment On Aroma Compounds Of The White Muscat Of Alexandria And Emir Wines, Turgut Cabaroğlu, Ahmet Canbaş Jan 2001

Effect Of Glucosidases Enzyme Treatment On Aroma Compounds Of The White Muscat Of Alexandria And Emir Wines, Turgut Cabaroğlu, Ahmet Canbaş

Turkish Journal of Agriculture and Forestry

The effect of an exogenous commercial enzyme with glycosidase activities on free and glycosidically bound aroma compounds of the white wines obtained from muscat of Alexandria and Emir cultivars was investigated. The fermenting must was divided into two equal parts towards the end of the fermentation and 40 mg/l of enzyme was added to one part. The aroma compounds of the wines were extracted with Amberlite XAD-2 resin and were identified by gas chromatography-mass spectrometry. Their concentrations were determined by gas chromatography. As a result of the enzyme treatment, the concentration of free aroma compounds (terpenes, volatile phenols, C-13 norisoprenoids …

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Overcoming America's Wood Deficit: An Overlooked Option, Carl E. Fiedler, Stephen F. Arno, Charles E. Keegan, Keith A. Blatner Jan 2001

Overcoming America's Wood Deficit: An Overlooked Option, Carl E. Fiedler, Stephen F. Arno, Charles E. Keegan, Keith A. Blatner

Forest Management Faculty Publications

No abstract provided.

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Crossing Methodological Boundaries: Assessing Visitor Motivations And Support For Management Actions At Yellowstone National Park Using Quantitative And Qualitative Research Approaches, William T. Borrie, Wayne A. Freimund, Mae A. Davenport, Robert E. Manning Jan 2001

Crossing Methodological Boundaries: Assessing Visitor Motivations And Support For Management Actions At Yellowstone National Park Using Quantitative And Qualitative Research Approaches, William T. Borrie, Wayne A. Freimund, Mae A. Davenport, Robert E. Manning

Society and Conservation Faculty Publications

Winter use of Yellowstone National Park has given rise to a complex of management issues, including rapid growth in recreation demand, environmental impacts of snowmobiling, and a string of litigation against the National Park Service (NPS) designed to both protect park resources and maintain public access (Sacklin et al. 2000). The intertwined character of these problems suggests that none can be resolved independently of the other, that policy must be comprehensive in nature, and that many sources of knowledge may be required to effect their resolution.

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Approaches To Measuring Quality Of The Wilderness Experience, William T. Borrie, Robert M. Birzell Jan 2001

Approaches To Measuring Quality Of The Wilderness Experience, William T. Borrie, Robert M. Birzell

Society and Conservation Faculty Publications

Wilderness is a special place that provides opportunity for unique and profound experiences. An essential task for the maintenance of these recreational opportunities is the definition and monitoring of experience quality. Four approaches to the measurement of the wilderness experience have developed in over 30 years of research: satisfaction approaches (which focus on evaluation of onsite conditions), benefits-based approaches (focusing on psychological outcomes), experience-based approaches (describing cognitive states experienced in wilderness), and meanings-based approaches (documenting socially constructed meanings ascribed to the experience). Each approach has its strengths and weaknesses. Given that the wilderness experience is a multifaceted phenomenon, it is …

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