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2005

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Articles 151 - 180 of 216

Full-Text Articles in Forest Sciences

Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan Jan 2005

Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan

Turkish Journal of Agriculture and Forestry

The hazelnut is an important product in Turkey's economy as it is an important source of income for a large number of family farms and makes up around 75% of world production and 20% of total agricultural exports from Turkey. Hazelnut production has increased in recent years along with high levels of storage and expansion of planted areas from traditional steep lands to flat lands, where alternative cropping is possible. The aim of this study was to determine the major causes of these problems using an econometric model of Turkey's hazelnut sector. Estimation results of the model comply with economic …

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Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay Jan 2005

Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay

Turkish Journal of Agriculture and Forestry

The experiment was conducted during the 2001-2003 cropping period to evaluate the effects of 3 tillage systems, conventional tillage (CT), and minimum tillage with rototiller (MTR) and disc (MTD), on the soil properties and wheat yield (Triticum aestivum L.). Based on 2-year results, soil bulk density at 0-10 cm in the growing period in MTR, CT and MTD was 1.20, 1.34 and 1.24 Mg m^{-3} respectively. Corresponding values at 10-20 and 20-30 cm were 1.26, 1.29 and 1.21 Mg m^{-3} and 1.30, 1.27 and 1.40 Mg m^{-3} respectively. Aggregate size distribution and mean weight diameter throughout the 2 years of …

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Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan Jan 2005

Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan

Turkish Journal of Agriculture and Forestry

Studies of clay mineralogy and related chemical composition are rarely connected with implications for soil management in the field. However, this study attempts to manifest the practical utilization of analytical data for determining the susceptibility to soil erosion. The data obtained involve the determination of clay mineral properties, calcium/magnesium ratios, and free aluminum (Al) and iron (Fe) oxides on structure stability, and hydraulic conductivity properties. Nine representative soil pedons developed on serpentine, limestone, and basalt parent materials were selected for the study. The soils were initially grouped into 3 according to their structural stability values. Group 1 soils had the …

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An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z Jan 2005

An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z

Turkish Journal of Agriculture and Forestry

This study was conducted to determine suitable perennial forage species and their mixtures for the establishment of short-term artificial pastures under dry conditions in Ankara between 2000 and 2002. Alfalfa (Medicago sativa L.), sainfoin (Onobrychis sativa Lam.), smooth brome (Bromus inermis Leys.), crested wheatgrass (Agropyron cristatum (L.) Gaertn.) and their binary and complex mixtures were used. The research was carried out in a randomized block design with 4 replicates. The results showed significant differences among the botanical composition ratio in mixtures. The highest green, hay and dry matter yield were obtained from alfalfa + smooth brome mixtures (16.05 t ha^{-1}, …

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Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal Jan 2005

Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal

Turkish Journal of Agriculture and Forestry

The pollen morphology and ultrastructure of selected Turkish indigenous grape cultivars and newly released hybrid varieties were examined by light microscopy and scanning electron microscopy. The pollen differed in some microstructural parameters. The size of the pollen grains ranged from 19.0 x 22.4 µm in Beyaz Çavuş to 24.3 x 21.0 µm in Siyah Gemre. Hönüsü cultivar showed significant variations in the sizes of the polar and equatorial axes. The greatest colpus size was measured in Siyah Gemre (18.4 µm) and the longest pore size was observed in Ata sarısı (28 µm). The exine thickness of the pollen grains ranged …

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Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş Jan 2005

Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş

Turkish Journal of Agriculture and Forestry

This study was initiated to survey the graft compatibility characteristics of some selected quince clones known as "S.Ö." with regard to isoperoxidase markers. Compatible (Beurre Hardy = BH) and incompatible (Bartlett = BT) pear cultivars were grafted on quince A (QA) and 13 S.Ö. quince clones by T budding. Bark tissues were collected from the union (4, 8 and 12 weeks after grafting) and from unbudded rootstocks in addition to current-year shoots of 2 pear scions to investigate 2 anodal isoperoxidase bands. Isoperoxidase profiles of the samples were visualized by native polyacrylamide gel electrophoresis and no marked difference was detected …

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The Impact Of Genomics And Genetics On Wheat Quality Improvement, John Snape, Lesley Fish, David Leader, Robert Bradburne, Adrian Turner Jan 2005

The Impact Of Genomics And Genetics On Wheat Quality Improvement, John Snape, Lesley Fish, David Leader, Robert Bradburne, Adrian Turner

Turkish Journal of Agriculture and Forestry

This paper discusses how genetic and genomic tools may be used to understand the genetical and molecular control of cereal quality and to develop tools for its manipulation by conventional and genetic engineering approaches. Comprehensive genetic maps are a first step in the genetical and molecular analysis of traits and these now allow the dissection of the genetical control of complex traits. As an example, data on the genetical control of grain protein content in UK winter wheats is presented. From a series of field trials, several potentially useful new QTLs were identified on chromosomes 2B, 5D, 6A, 6B, 7A …

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Role Of Conventional Plant Breeding And Biotechnology In Future Wheat Production, Sanjaya Rajaram Jan 2005

Role Of Conventional Plant Breeding And Biotechnology In Future Wheat Production, Sanjaya Rajaram

Turkish Journal of Agriculture and Forestry

The global wheat production by year 2020 could be increased by 40% provided there is a good integrated multidisciplinary wheat research program optimally funded by either public or private sectors. More emphasis needs to be placed on: 1) Improving yield potential; 2) Durable disease resistance; 3) Increasing abiotic stress tolerance; 4) Adopting better conservation systems. There are roles for both conventional plant breeding and biotechnology supported by other disciplines to achieve this goal.

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Role Of Wheat In Diversified Cropping Systems In Dryland Agriculture Of Central Asia, Mekhlis Suleimenov, Kanat Akhmetov, Zheksembay Kaskarbayev, Aitkalym Kireyev, Lyudmila Martynova, Rakhim Medeubayev Jan 2005

Role Of Wheat In Diversified Cropping Systems In Dryland Agriculture Of Central Asia, Mekhlis Suleimenov, Kanat Akhmetov, Zheksembay Kaskarbayev, Aitkalym Kireyev, Lyudmila Martynova, Rakhim Medeubayev

Turkish Journal of Agriculture and Forestry

Wheat is major crop in dryland agriculture of Central Asia. In most cases both spring wheat and winter wheat are grown in rotation with summer fallow. Studies were conducted in order to identify alternative crops which possibly could replace part of summer fallow and part of wheat area. Summer fallow was found inefficient practice for soil moisture accumulation in semiarid steppes of northern and southern Kazakhstan as well as in Kyrgyzstan. Many alternative crops were identified in all zones of dryland farming providing better incomes to farmers than wheat. Most important are food legumes as field pea, chickpea, lentil, oilseeds …

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Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül Jan 2005

Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül

Turkish Journal of Agriculture and Forestry

Avenacins are a mixture of 4 major (avenacin A-1, B-1, A-2 and B-2) autofluorescent compounds that are accumulated in the roots of oats (Avena spp.), especially root tips, and that have antimicrobial properties. In this research, we screened 189 genotypes of the family Gramineae for autofluorescence and also quantified 35 Avena genotypes for avenacin A-1 content, which is the most abundant and toxic avenacin type. Screening under UV transillumination proved that none of the species, except for Avena spp. accumulated avenacins in their roots. We aimed to find a genotype that lacks avenacin A-1 in order to investigate fungus-oat interaction …

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Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan Jan 2005

Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan

Turkish Journal of Agriculture and Forestry

The two-spotted spider mite, Tetranychus urticae Koch, was tested for susceptibility to various acaricides, propargite (Omite) 570 g l^{-1}, amitraz (Kortraz) 200 g l^{-1} and abamectin (Agrimec) 18 g l^{-1}. Propargite, a selective acaricide, has been used to control T. urticae in many crops in Turkey. Amitraz and abamectin have acaricidal and insecticidal properties, and are thus used to control spider mites and some vegetable pests (e.g., whiteflies and Liriomyza spp.). Five different T. urticae populations collected from vegetable greenhouses in Isparta and their responses to those acaricides were investigated by leaf dip assay and compared with those of a …

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Economic Threshold For Wild Radish (Raphanus Raphanistrum L.) Control In Wheat Fields, Özhan Boz Jan 2005

Economic Threshold For Wild Radish (Raphanus Raphanistrum L.) Control In Wheat Fields, Özhan Boz

Turkish Journal of Agriculture and Forestry

Field experiments were conducted in Aydın province in 1998 and 1999 to determine the economic threshold (ET) using florasulam + flumetsulam, 2,4-D amine, thifensulfuron methyl + tribenuron-methyl, and tribenuron-methyl for wild radish (Raphanus raphanistrum L.) in wheat. The effect of wild radish density (1, 2, 4, 8 and 16 plants m^{-2}) on wheat yield was investigated using an adjacent plot design with 4 fields. For each weed density, yield was compared with that in the adjacent weed-free control plot. The grain yield in wild radish-free wheat was 4079 kg ha^{-1} in 1998, 4369 kg ha^{-1} in 1999 and 4224 kg …

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Salinity Response Of Transgenic Potato Genotypes Expressing The Oxalate Oxidase Gene, Hakan Turhan Jan 2005

Salinity Response Of Transgenic Potato Genotypes Expressing The Oxalate Oxidase Gene, Hakan Turhan

Turkish Journal of Agriculture and Forestry

In vitro and in vivo responses of transgenic and non-transgenic potato (Solanum tuberosum L.) genotypes to salinity were investigated. A gene responsible for the production of oxalate oxidase enzyme, whose expression has been associated with plant stress tolerance, was used. Transgenic potato plants expressing the oxalate oxidase enzyme were produced using Agrobacterium-mediated transformation. The transgenic nature of the plants was verified by their antibiotic (kanamycin) resistance and then in vitro enzyme assays. Four independent transgenic genotypes obtained from 2 cultivars, Maris Bard and Desiree, were tested at 5 levels of NaCl (0%, 0.25%, 0.50%, 0.75% and 1.00% w/v) in vitro. …

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Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen Jan 2005

Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen

Turkish Journal of Agriculture and Forestry

Hypericum perforatum L. is a medicinal perennial known as "St. John's wort" in Western Europe and used in the treatment of mild to moderate depression. Hypericin, a dianthrone red pigment, is considered responsible for reversing the depression symptoms. The goal of this study was to produce this pigment via micropropagation and thereby describe a suitable micropropagation method for this plant. To achieve this objective, leaf discs and stem segments were cultured on Murashige and Skoog (MS) medium supplemented with kinetin and 2,4-dichlorophenoxyacetic acid (0.5, 1 and 1.5 mg l^{-1}) and sucrose concentrations (30, 40 and 50 g l^{-1}) in darkness …

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Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya Jan 2005

Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya

Turkish Journal of Agriculture and Forestry

Concentrations of indole-3-acetic acid (IAA), gibberellic acid (GA_3) and abscisic acid (ABA) were measured by gas chromatography (GC) in the berries of 3 grape cultivars having different berry set mechanisms to elucidate the possible relationship between endogenous hormones and berry set mechanisms. The results obtained showed that the levels of IAA, GA_3 and ABA in seeded Italia, empty seeded Çavuş and stenospermocarpic seedless Perlette changed during ripening. While Italia exhibited a hormonal pattern similar to that of Çavuş, Perlette showed a different IAA and ABA pattern compared to the other cultivars. Generally, IAA and GA_3 were high in the early …

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Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r Jan 2005

Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r

Turkish Journal of Agriculture and Forestry

This paper deals with the priority-setting problem in public research projects in the Turkish forestry sector. For this aim, a combined method has been developed, that is scientific, objective, dynamic, consistent, multidimensional, easily applicable and understandable. The theoretical framework, peculiarities and criteria of the method and weighting of the criteria are explained. Assuring hierarchical multidimensional consistency between the purposes and priorities in the national and sectoral plans with the priorities of forestry research projects was followed for selecting the criteria and weighting them. This method was suggested to the Ministry of Environment and Forestry and its application was implemented through …

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Variation In Isoprene Emission From Quercus Rubra: Sources, Causes, And Consequences For Estimating Fluxes, Jennifer L. Funk, Clive G. Jones, Dennis W. Gray, Heather L. Throop, Laura A. Hyatt, Manuel T. Lerdau Jan 2005

Variation In Isoprene Emission From Quercus Rubra: Sources, Causes, And Consequences For Estimating Fluxes, Jennifer L. Funk, Clive G. Jones, Dennis W. Gray, Heather L. Throop, Laura A. Hyatt, Manuel T. Lerdau

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Isoprene is the dominant volatile organic compound produced in many forest systems. Uncertainty in estimates of leaf level isoprene emission rate stems from an insufficient understanding of the patterns and processes controlling isoprene emission capacity in plant leaves. Previous studies suggest that variation in isoprene emission capacity is substantial; however, it is not known at what scale emission capacity is the most variable. Identifying the sources of variation in emission capacity has implications for conducting measurements and for model development, which will ultimately improve emission estimates and models of tropospheric chemistry. In addition, understanding the sources of variation will help …

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Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry Jan 2005

Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry

Turkish Journal of Agriculture and Forestry

Spectral analyses, one of the most advanced remote sensing techniques, were used as a possible means of identifying the mineralogy of the clay fractions that corresponded to the Küçük Menderes Plain, south of İzmir, Turkey. Different spectral processes were used to execute the prospective spectral analyses. The processes include: i. the reflectance calibration of TM images belonging to the studied area, ii. using minimum noise fraction (MNF) transformation and iii. creating the pixel purity index (PPI), which was used to the most "spectrally pure", extreme, pixel in multi-spectral images. Spectral analyses of the clay mineralogy of the studied area were …

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Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen Jan 2005

Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen

Turkish Journal of Agriculture and Forestry

Mutation breeding is one of the breeding methods used successfully in durum wheat for selecting lines with increased agronomic values. The aim of this study was to select mutant lines having a better agronomic potential than the mother variety Gediz-75 in the M_6 and M_7 generations. The mutants were derived from the variety Gediz-75 of durum wheat (Triticum durum Desf.). The seeds were either irradiated with gamma rays at Cobalt 60 (^{60}Co) or treated with ethyl-methane-sulfonate (EMS). Eighteen selected mutants and the mother variety Gediz-75 were examined in the M_6 and M_7 generations for yield and quality characteristics. The experiments …

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Effects Of Different Water And Nitrogen Levels On The Yield And Periodicity Of Pistachio (Pistacia Vera L.), Mustafa Ünlü, Riza Kanber, Pasquale Steduto, Yusuf Aydin, Kenan Di̇ker Jan 2005

Effects Of Different Water And Nitrogen Levels On The Yield And Periodicity Of Pistachio (Pistacia Vera L.), Mustafa Ünlü, Riza Kanber, Pasquale Steduto, Yusuf Aydin, Kenan Di̇ker

Turkish Journal of Agriculture and Forestry

The effects of 2 irrigation intervals (I_{f1}: 7 days and I_{f2}: 14 days), 4 nitrogen doses (N_g, N_0, N_1, N_2 and N_3) and 2 crop coefficients (K_{pc1}: 0.60 and K_{pc2}: 0.90) on pistachio nut fertigation were studied to establish suitable irrigation and fertigation scheduling. The nitrogen levels were 0, 10, 15 and 20 mg L^{-1}. In the traditional treatment, N_g, each tree received 500/600/400 g of NPK fertilizer at the beginning of February. Other fertilizer doses were applied in the irrigation water through a drip system. Irrigation water amount was calculated based on Class A-Pan evaporation. Wetted percentage in each …

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American Linden (Tilia Americana), Nebraska Forest Service Jan 2005

American Linden (Tilia Americana), Nebraska Forest Service

Nebraska's Landscape Tree Information

American Linden (Tilia americana) is native along much of the Missouri River that borders Nebraska. It is a large tree with a rounded and very dense crown. American Linden, also known as basswood, has been a favorite for planting in the city as well as around farm homes. Because of its size and shape it makes an excellent shade tree.

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Baldcypress (Taxodium Distichum), Nebraska Forest Service Jan 2005

Baldcypress (Taxodium Distichum), Nebraska Forest Service

Nebraska's Landscape Tree Information

Baldcypress (Taxodium distichum) is not a very common tree in Nebraska but it is beginning to gain more popularity. Baldcypress is most familiar as a swamp loving tree in a more southerly location but it is very adaptable and can be planted with success in Nebraska and Iowa. Baldcypress is a deciduous evergreen. It looks like a pine or spruce during the summer but then in the fall, the needles turn a lovely rust color and fall off. Sometimes those who are not familiar with the tree assume that it has died and have it cut down, a …

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Amur Maple (Acer Ginnala), Nebraska Forest Service Jan 2005

Amur Maple (Acer Ginnala), Nebraska Forest Service

Nebraska's Landscape Tree Information

Fall is Nebraska’s most consistent season and one that just begs for a drive in the country. The contrasting colors created by the fields of crops, ready for harvest, against the beauty of the fall coloration of trees is a site to remember. Even in the driest years, the colors always seem to put a nice end on the summer months. This publications is about the Amur Maple (Acer ginnala).

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Black Walnut (Juglans Nigra), Nebraska Forest Service Jan 2005

Black Walnut (Juglans Nigra), Nebraska Forest Service

Nebraska's Landscape Tree Information

The Black Walnut (Juglans nigra) is not a very common tree to plant in your landscape. The large nuts can cause a real problem in the fall and most landowners tend to shy away from trees with heavy fruit. But Black Walnut remains as a very lovely tree through its life and it is found on many farms in woodlots and around the farm buildings. It is most well known for its wood that is used for veneer to make fine paneling and furniture. High quality cabinets as well as many other products including musical instruments rely on …

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Northern Catalpa (Catalpa Speciosa), Nebraska Forest Service Jan 2005

Northern Catalpa (Catalpa Speciosa), Nebraska Forest Service

Nebraska's Landscape Tree Information

Northern Catalpa is a tree that is not usually planted as a landscape specimen and it is often overlooked for rural plantings as well. But the tree does have some excellent qualities that should not be overlooked.

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Kentucky Coffeetree (Gymnocladus Dioicus), Nebraska Forest Service Jan 2005

Kentucky Coffeetree (Gymnocladus Dioicus), Nebraska Forest Service

Nebraska's Landscape Tree Information

One of the more unusual trees that occur in Nebraska is the Kentucky Coffeetree (Gymnocladus dioicus). Some books will tell you it is a medium sized tree but in this part of the country medium and large trees tend to blend together. Kentucky Coffeetree is native from Lake Erie to Oklahoma and includes Kentucky on the southeastern side and Minnesota on the northwest. To no one’s surprise it is the state tree of Kentucky.

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Colorado Spruce (Picea Pungens) Nebraska Forest Service Jan 2005

Colorado Spruce (Picea Pungens) Nebraska Forest Service

Nebraska's Landscape Tree Information

Colorado Spruce (Picea pungens) is native to the Rocky Mountain region and the southwestern United States. It is the state tree of Colorado and has been widely planted in Nebraska and many other parts of the country. It is one of the most popular of evergreens because of the characteristic blue color of the leaves. Colorado Spruce is often called “Blue” spruce or “Colorado Blue” Spruce. The tree has been widely propagated and selected for color and growth habit. The blue color can range from a very bright blue to a dark green and the tree can often …

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Ginkgo (Ginkgo Biloba), Nebraska Forest Service Jan 2005

Ginkgo (Ginkgo Biloba), Nebraska Forest Service

Nebraska's Landscape Tree Information

Ginkgo (Ginkgo biloba) has long been a favorite for city planting and it has found a home as a specimen tree in the landscape. It is undoubtedly one of the most distinct of all deciduous trees. The bright green fan shaped leaves are unique among all trees and turn a golden yellow in the fall. Ginkgo has been dated back over 150 million years and at one time was native to North America. Leaf prints can be found in fossils and thus the tree is sometimes called a living fossil.

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Norway Maple (Acer Platanoides), Nebraska Forest Service Jan 2005

Norway Maple (Acer Platanoides), Nebraska Forest Service

Nebraska's Landscape Tree Information

The Norway Maple (Acer platanoides) is one of the more popular trees in the nursery trade. It is easily transplanted and it has very few insect or disease enemies. It can, however, have problems with the sometimes-harsh climate in this area. The Norway Maple is a common tree throughout much of Europe, including (not surprisingly) Norway. It is an important commercial species there just as sugar maple is here in North America. It is used for furniture, flooring and musical instruments. In fact, the Stradivarius violins are said to be made of Norway Maple.

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Douglas Fir (Pseudotsuga Menziesii), Nebraska Forest Service Jan 2005

Douglas Fir (Pseudotsuga Menziesii), Nebraska Forest Service

Nebraska's Landscape Tree Information

Douglas Fir (Pseudotsuga menziesii) is one of the most important timber trees in the United States. It is harvested for a wide variety of uses and is the backbone of the western timber industry. The wood has great strength and yet it is not a very heavy. That has made it most valuable as a raw material for all types of construction. In addition to being an important timber tree, Douglas Fir is also a very popular tree for landscape planting and even for windbreaks. The tree is named for David Douglas, a 19th century Scottish botanist and …

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