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2004

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Articles 181 - 197 of 197

Full-Text Articles in Forest Sciences

Effect Of Tissue On The Inoculation And Detection Of Xylella Fastidiosa In The Grapevine, Ni̇hal Buzkan, M. Andrew Walker Jan 2004

Effect Of Tissue On The Inoculation And Detection Of Xylella Fastidiosa In The Grapevine, Ni̇hal Buzkan, M. Andrew Walker

Turkish Journal of Agriculture and Forestry

Pierce's disease of the grapevine is caused by a xylem-limited bacterium, Xylella fastidiosa (Xf). Susceptible vines die within a few years after infection. However, the mechanism of pathogenesis is not fully understood. It is very important to optimize the timing and positioning of inoculation in host plants to study the infection process. Rooted dormant cuttings of cv. Chardonnay (susceptible vine) were grouped as stem tissue hardening and shoot elongation for needle-inoculation with 20 µl of 2 x 10^8 cfu ml^{-1} of Xf suspension. The infected plants were sampled 2 and 3 weeks following postinoculation (wpi) at 10 cm above the …

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Determination Of Optimum Weed Control Timing In Maize (Zea Mays L.), M. Nedi̇m Doğan, Aydin Ünay, Özhan Boz, Fi̇li̇z Albay Jan 2004

Determination Of Optimum Weed Control Timing In Maize (Zea Mays L.), M. Nedi̇m Doğan, Aydin Ünay, Özhan Boz, Fi̇li̇z Albay

Turkish Journal of Agriculture and Forestry

In field experiments conducted in 2001 and 2002, the optimum timing for weed control in maize was investigated. Both experiments were designed according to randomized complete blocks, and Cyperus rotundus L., Amaranthus retroflexus L., Portulaca oleracea L. and Chenopodium album L. were naturally infested on experimental plots in both years. The study in 2001 was conducted to determine the critical period for weed control for maize. With this aim plots were maintained weed-free or weedy for different periods based on crop growth stage. The relationships between grain yield and different weedy or weed-free periods were determined via regression analyses in …

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In Vitro Propagation Of Some New Banana Types (Musa Spp.), Hami̇de Gübbük, Mustafa Pekmezci̇ Jan 2004

In Vitro Propagation Of Some New Banana Types (Musa Spp.), Hami̇de Gübbük, Mustafa Pekmezci̇

Turkish Journal of Agriculture and Forestry

Three newly selected superior banana types were used to study the effects of different cytokinin and auxins on shoot multiplication and rooting. Benzylaminopurine [(BAP) (5, 10, 20 and 30 µM)] and thidiazuron [(TDZ) (0.4, 1, 2 and 3 µM)] were tested alone and with 1 µM indoleacetic acid (IAA) for the propagation stage. We compared basal Murashige and Skoog (MS) medium, active charcoal (5 g l^{-1}), indole-3-butyric acid (IBA) and naphthaleneacetic acid (NAA) for rooting. Shoot proliferation and elongation were significantly greater with TDZ than with BAP all 3 types. Furthermore, each cytokinin with IAA increased shoot proliferation and elongation …

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Comparison Of Fresh Pod Yield And Pod Related Characteristics In Pea (Pisum Sativum L.) Cultivars Sown In Autumn And Spring Under Samsun Ecological Conditions, Erkut Pekşen, Aysun Pekşen, Hati̇ce Bozoğlu, Ali̇ Gülümser Jan 2004

Comparison Of Fresh Pod Yield And Pod Related Characteristics In Pea (Pisum Sativum L.) Cultivars Sown In Autumn And Spring Under Samsun Ecological Conditions, Erkut Pekşen, Aysun Pekşen, Hati̇ce Bozoğlu, Ali̇ Gülümser

Turkish Journal of Agriculture and Forestry

: In this study, 15 pea (Pisum sativum L.) cultivars sown in autumn and spring were investigated for their fresh pod yield and pod characteristics under Samsun ecological conditions during the 1999-2000 and 2000-2001 growing seasons. The results of the study for fresh pod yield from the combined 2 years showed that there was a statistically significant difference among the cultivars. The highest fresh pod yield was obtained from Vilmoren (17,840 kg ha^{-1}), followed by Lancet (14,290 kg ha^{-1}), Agromar AG 7306 (13,880 kg ha^{-1}), Jumbo (13,830 kg ha^{-1}), Sprinter (13,690 kg ha^{-1}), Sugar Bon (12,370 kg ha^{-1}), Bolero (12,800 …

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Correlation And Path Coefficient Analyses Of Seed Yield Components In The Narbon Bean (Vicia Narbonensis L.), Celal Yücel Jan 2004

Correlation And Path Coefficient Analyses Of Seed Yield Components In The Narbon Bean (Vicia Narbonensis L.), Celal Yücel

Turkish Journal of Agriculture and Forestry

The purpose of this research was to evaluate phenotypic correlation coefficents between seed yield per plant and some yield components, and to determine the direct and indirect effect of 6 components on seed yield per plant in narbon bean (Vicia narbonensis L.) lines. The research was conducted in the area of the Field Crops Research Training Center of the University of Çukurova, in Adana, Turkey, in the 1996/97 and 1997/98 crop years. The randomized complete blocks design with 3 replications was used. Positive and statistically significant (p

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Insect Growth Regulators For Insect Pest Control*, Hasan Tunaz, Nedi̇m Uygun Jan 2004

Insect Growth Regulators For Insect Pest Control*, Hasan Tunaz, Nedi̇m Uygun

Turkish Journal of Agriculture and Forestry

Insecticides with growth regulating properties (IGR) may adversely affect insects by regulating or inhibiting specific biochemical pathways or processes essential for insect growth and development. Some insects exposed to such compounds may die due to abnormal regulation of hormone-mediated cell or organ development. Other insects may die either from a prolonged exposure at the developmental stage to other mortality factors (susceptibility to natural enemies, environmental conditions etc) or from an abnormal termination of a developmental stage itself. Insect growth regulators may come from a blend of synthetic chemicals or from other natural sources, such as plants. The chemical composition of …

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Host-Specific Toxin Production By The Tomato Target Leaf Spot Pathogen Corynespora Cassiicola, Şener Kurt Jan 2004

Host-Specific Toxin Production By The Tomato Target Leaf Spot Pathogen Corynespora Cassiicola, Şener Kurt

Turkish Journal of Agriculture and Forestry

The culture filtrate (CF) of Corynespora cassiicola, the causal agent of target leaf spot of tomato, produced visible small, pinpoint, water-soaked lesions on the lower surface of wounded, detached leaves after incubation for 48 h. The extraction, isolation and purification of C. cassiicola tomato (CCT) toxin was achieved by anion exchange and gel filtration chromatography. Treatments of the CF with Diaion HP-20 resin and Cosmosil C18-OPN gel were found to be highly effective. The toxin purified partially by cosmosil gel filtration was highly active against the tomato cultivar Momotaro used in the bioassay test, and the fraction eluted with 50% …

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Harvest Date Influences Superficial Scald Development In Granny Smith Apples During Long Term Storage, Mustafa Erkan, Mustafa Pekmezci̇ Jan 2004

Harvest Date Influences Superficial Scald Development In Granny Smith Apples During Long Term Storage, Mustafa Erkan, Mustafa Pekmezci̇

Turkish Journal of Agriculture and Forestry

The effects of harvest dates on superficial scald development and postharvest quality in 'Granny Smith' apples (Malus domestica Borkh.) were investigated. Apples were harvested at 15-day intervals during 2 consecutive years (2000-2001) and stored at 0 °C with 90% relative humidity for 8 months. At the end of the 8 - month storage period plus an additional 1 week at 20 °C the percentage of superficial scald was lower (24.4%) in late harvested (November 15) apples than in apples harvested early (October 15), which was 85.4%. The apples harvested late reached a climacteric maximum quicker than those harvested early. The …

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Effects Of Inoculation With Rhizobium On Forage Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel Jan 2004

Effects Of Inoculation With Rhizobium On Forage Yield And Yield Components Of Common Vetch (Vicia Sativa L.), Sebahatti̇n Albayrak, Cafer Sirri Sevi̇may, Özgür Töngel

Turkish Journal of Agriculture and Forestry

The effects of inoculation with Rhizobium on forage yield and yield components of common vetch (Vicia sativa L.) were evaluated under rainy conditions in Samsun, Turkey, in the 2001-2002 and 2002-2003 growing seasons. Common vetch cultivars Kubilay, Ürem, Kara elçi, Uludağ, Emir, Çubuk, Nilüfer and Rhizobium leguminosarum were used as materials. The experiment was established as a split block design with 3 replicates as averages of 2 years. While the highest forage and dry matter yields were determined in the inoculated cultivar Kara elçi, the highest crude protein content and crude protein yield were obtained from the inoculated cultivars Kubilay …

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Effects Of Different Sowing Date And Intrarow Spacing On Yield And Some Agronomic Traits Of Safflower (Carthamus Tinctorius L.) Under Harran Plain's Arid Conditions*, Abdulhabi̇p Özel, Tuncay Demi̇rbi̇lek, M. Ati̇lla Gür, Osman Çopur Jan 2004

Effects Of Different Sowing Date And Intrarow Spacing On Yield And Some Agronomic Traits Of Safflower (Carthamus Tinctorius L.) Under Harran Plain's Arid Conditions*, Abdulhabi̇p Özel, Tuncay Demi̇rbi̇lek, M. Ati̇lla Gür, Osman Çopur

Turkish Journal of Agriculture and Forestry

This study was conducted to determine the suitable sowing date and intrarow spacing for safflower (Carthamus tinctorius L.) under Harran Plain's arid conditions during the 1998-1999 and 1999-2000 winter growing seasons. Four sowing dates (mid-October, early November, mid-November and early December) and 5 intrarow spacings (5 cm, 10 cm, 15 cm, 20 cm and 25 cm) were applied. Dinçer-118 was used as the safflower cultivar. Seed yield (1191.7-667.5 kg ha^{-1}), oil content (35.48-25.66%), oil yield (389.4-175.9 kg ha^{-1}), shell rate (50.37-39.33%) and 1000-seed weight (36.71-29.22 g) were investigated and all parameters measured were significantly affected by the treatments. The results …

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Effect Of Foliar Iron Applications At Different Growth Stages On Iron And Some Nutrient Concentrations In Strawberry Cultivars, İbrahi̇m Erdal, Kahraman Kepenek, İlhan Kizilgöz Jan 2004

Effect Of Foliar Iron Applications At Different Growth Stages On Iron And Some Nutrient Concentrations In Strawberry Cultivars, İbrahi̇m Erdal, Kahraman Kepenek, İlhan Kizilgöz

Turkish Journal of Agriculture and Forestry

This study was conducted to investigate the effect of foliar Fe applications on leaf Fe and some nutrient (P, Ca, Mg, K, Mn and Zn) concentrations in strawberry (Fragaria vesca L.) cultivars. For this purpose, 2 forms of Fe solutions (FeSO_4. 7 H_2O and Fe-EDTA) containing 0.28% Fe were sprayed onto the strawberry leaves at 3 growth stages (before blooming, first blooming, full blooming). Depending on the Fe sources, Fe concentration increased after each application. Before blooming, leaf Fe concentration increased from 60 mg kg^{-1} (control) to 127 and 105 mg kg^{-1} with Fe-EDTA and FeSO_4. 7 H_2O, respectively. During …

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Soil Respiration In Young And Old Oriental Spruce Stands And In Adjacent Grasslands In Artvin, Turkey, Aydin Tüfekçi̇oğlu, Mehmet Küçük Jan 2004

Soil Respiration In Young And Old Oriental Spruce Stands And In Adjacent Grasslands In Artvin, Turkey, Aydin Tüfekçi̇oğlu, Mehmet Küçük

Turkish Journal of Agriculture and Forestry

Soil respiration is a good indicator of soil quality. In this study, the influence of species type and sampling time on soil respiration in young and old oriental spruce (Picea orientalis (L.) Link.) stands without understory and with a Rhododendron ponticum L. understory and in adjacent grasslands were investigated in Genya Mountain, Artvin, Turkey. Soil respiration was measured approximately monthly from May to October using the soda-lime technique. Mean daily soil respiration across all sites ranged from 0.26 to 2.66 g C m^{-2} d^{-1}. There were significant differences between grasslands and old forest sites, but no significant differences between young …

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Effect Of Different Operating Parameters On Seed Holding In The Single Seed Metering Unit Of A Pneumatic Planter, Zeli̇ha Bereket Barut, Azi̇z Özmerzi̇ Jan 2004

Effect Of Different Operating Parameters On Seed Holding In The Single Seed Metering Unit Of A Pneumatic Planter, Zeli̇ha Bereket Barut, Azi̇z Özmerzi̇

Turkish Journal of Agriculture and Forestry

This research was performed to determine the effect of different operating parameters on seed holding in a single seed metering unit. The metering unit was a vertical seed plate with a vacuum, used in seeding maize (Zea mays L.). An electronic counter in the metering unit was used to determine the holes without seed on the plate holes. The shapes of the holes, peripheral velocities, vacuum pressure, hole area on the seed plate and thousand grain weight of seed (TGW) were chosen as the operating parameters. A Factorial Completely Randomized Design was used for analysis of variance, Duncan's multiple range …

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The Effect Of Moisture Content And Wood Density On The Preservative Uptake Of Caucasian Fir (Abies Nordmanniana (Link.) Spach.) Treated With Cca, İlker Usta Jan 2004

The Effect Of Moisture Content And Wood Density On The Preservative Uptake Of Caucasian Fir (Abies Nordmanniana (Link.) Spach.) Treated With Cca, İlker Usta

Turkish Journal of Agriculture and Forestry

The effect of moisture content and wood density on the preservative uptake (on the basis of the percentage of void volume filled (VVF%)) of Caucasian fir (Abies nordmanniana (Link.) Spach.) was studied in various levels of moisture content (MC). VVF% was measured in 11 MC regimes (7 of which were designed to be below the fibre saturation point (FSP)) consequtively nominated using a conventional kiln. All the samples were treated with CCA-tanalith C via a mild schedule of full-cell impregnation. A significant correspondence between MC and both wood density and VVF% was established and an attempt was thus made to …

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Determination Of Wetland Vegetation Height With Lidar, Levent Genç, Bon Dewitt, Scot Smith Jan 2004

Determination Of Wetland Vegetation Height With Lidar, Levent Genç, Bon Dewitt, Scot Smith

Turkish Journal of Agriculture and Forestry

Light Detection and Ranging (LIDAR) is a new technology that offers a potential alternative to field surveying and photogrammetric techniques for the collection of elevation data. It has the advantages of being rapid accurate and able to map areas that are difficult to access. LIDAR has demonstrated the capability to accurately estimate important vegetation structural characteristics such as forest canopy height. For these reasons, airborne LIDAR data were used to compare vegetation height determinations with field observations on one selected transect in the vicinity of Lake Hatchineha in Florida, USA. The approach was based on the LIDAR and field measurements. …

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Determining Suitable Investment Areas For The Forest Products Industry: An Example From The Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, İlker Akyüz, Hasan Seri̇n, Hi̇cabi̇ Cindik Jan 2004

Determining Suitable Investment Areas For The Forest Products Industry: An Example From The Black Sea Region In Turkey, Kadri̇ Cemi̇l Akyüz, İlker Akyüz, Hasan Seri̇n, Hi̇cabi̇ Cindik

Turkish Journal of Agriculture and Forestry

Investment decisions and regional development are significant for economic development and the welfare of society. The most suitable decision should be made by using multivariable statistical techniques in both public and private sector investments, because various factors may affect such investments. In this study the aim was to direct the preferences of private sector investments in the forest products industry in the Black Sea region, which lags behind the other regions from the point of view of economic development and has an unstable development situation. With this aim, cities with advantages and investment priorities were determined. Principal component analysis (PCA) …

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Agroforestry, Elephants, And Tigers: Balancing Conservation Theory And Practice In Human-Dominated Landscapes Of Southeast Asia, Philip J. Nyhus, R L. Tilson Dec 2003

Agroforestry, Elephants, And Tigers: Balancing Conservation Theory And Practice In Human-Dominated Landscapes Of Southeast Asia, Philip J. Nyhus, R L. Tilson

Philip J. Nyhus

Large mammal populations theoretically are best conserved in landscapes where large protected areas are surrounded by buffer zones, connected by corridors, and integrated into a greater ecosystem. Multi-use buffer zones, including those containing complex agroforestry systems, are promoted as one strategy to provide both economic benefits to people and conservation benefits to wildlife. We use the island of Sumatra, Indonesia to explore the benefits and limitations of this strategy. We conclude that conservation benefits are accrued by expanding the habitat available for large mammals but more attention needs to be focused on how to reduce and respond to human–wildlife conflict …

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