Forest Sciences Commons^™

Some Environmental Relationships Of Undergrowth Species In Aspen Communities Of The Intermountain West, W F. Mueggler

Aspen Bibliography

No abstract provided.

Effects Of Water Stress On Germination In Six Provenances Of Pinus Brutia Seeds From Different Bioclimatic Zones In Turkey, Meli̇h Boydak, Hüseyi̇n Di̇ri̇k, Fahretti̇n Ti̇lki̇, Mehmet Çalikoğlu

Turkish Journal of Agriculture and Forestry

The effects of water potential on germination were studied in six provenances of Pinus brutia from different bioclimatic zones in Turkey. Water potentials between 0 and -8 bars were obtained using polyethylene glycol 6000 (PEG-6000) solutions. Seeds were kept for 28 d in light (12 h photoperiod at 1000 lux) and at 20 ± 0.5 ^oC. A decrease in water potential produced a marked reduction in germination percentage, germination speed and germination value. Significant variations between the provenances were found. The provenances of humid regions were the most susceptible to high moisture stress, and their germination value and germination percentage …

Volume 1, Number 3 (2003), Ut Institute Of Agriculture

Tennessee Land, Life and Science Magazine

Issue Highlights:

• Booming Biotechnology
• Lessons in Leadership
• New Options for Producers
• Entering an Exciting New Era

Volume 1, Number 2 (2003), Ut Institute Of Agriculture

Tennessee Land, Life and Science Magazine

Issue Highlights:

• Insects as Teaching Tools
• Helping Children Succeed
• Honors Student Faces Bright Future
• Reinventing the Family Farm

Volume 1, Number 1 (2003), Ut Institute Of Agriculture

Tennessee Land, Life and Science Magazine

Issue Highlights:

• Adding Value to Dogwoods
• A Building to Advance Science
• Teaching Lessons in Life
• Towards a Brighter Forest Future

Effects Of Seedling And Gf-31 Rootstocks On Yield And Fruit Quality Of Some Table Apricot Cultivars Grown In Mersin, Levent Son, Ali̇ Küden

Turkish Journal of Agriculture and Forestry

This experiment was conducted in Mut-Mersin between 1997 and 2001 to determine the effects of seedling and GF-31 rootstocks on the yield and quality of fruits of Tokaloğlu, Precoce De Tyrinthe, Joubert Foulon, Canino, Sakıt 6, Beliana, Priana and Early Kishnevski table apricot cultivars. Fruit yields were highest on apricot seedling rootstocks for all cultivars. Yields (kg tree^{-1}) ranged between 14.66 kg (Tokaloğlu) and 63.06 kg (Priana) on apricot seedling rootstocks and between 13.6 kg (Sakıt 6) and 41.13 kg (Priana) on Myrobalan GF-31 rootstock in 2001. Of the cultivars tested, Priana gave the highest yield (kg tree^{-1}), except in …

The Role Of Eicosanoids On Nodulation Reactions To Bacterium Serratia Marcescens In Larvae Of Ostrinia Nubilalis, Hasan Tunaz, Ali̇ Arda Işikber, Mehmet Kubi̇lay Er

Turkish Journal of Agriculture and Forestry

Nodulation is the first step of the cellular defense reactions to bacterial infections in insects. In the present study, injecting larvae of the European corn borer, Ostrinia nubilalis, with eicosanoid biosynthesis inhibitors, immediately prior to intrahemocoelic injections of the bacterium, Serratia marcescens, sharply reduced the nodulation response to bacterial challenges. Separate treatments with specific inhibitors including dexamethasone (a phospholipase A_2 inhibitor), indomethacin (a cyclooxygenase inhibitor) and phenidone (a dual cyclooxgenase/lipoxygenase inhibitor) also impaired the ability of European corn borers to form nodules in reaction to bacterial challenges. The inhibitory influence of phenidone was apparent within 30 mins after infection, and …

Selection Of Chickpea (Cicer Arietinum L.) Genotypes For Resistance To Ascochyta Blight [Ascochyta Rabiei (Pass.) Labr.], Yield And Yield Criteria, Cengi̇z Toker, Hüseyi̇n Çanci

Turkish Journal of Agriculture and Forestry

Ascochyta blight, caused by Ascochyta rabiei (Pass.) Lab., is the most important disease in the chickpea (Cicer arietinum L.) in many countries, including Turkey. Efforts to control the disease were made using host-plant resistance as the most efficient and economical way. A total of 41 exotic genotypes were evaluated for resistance to A. rabiei and also yield and yield criteria near Antalya in the west Mediterranean region of Turkey in the 2000-2001 and 2001-2002 seasons. After every 2 test lines, the susceptible check ILC 263 was sown. When the susceptible check was completely killed by ascochyta blight, blight severity was …

The Effects Of Sewage Sludge Applications On The Yield,Growth, Nutrition And Heavy Metal Accumulation In Apple Trees Growing In Dry Conditions, Mehmet Ali̇ Bozkurt, Tarik Yarilgaç

Turkish Journal of Agriculture and Forestry

The effects of various sewage sludge (biosolid) rates and a single dose barnyard manure application on the fruit yield, growth, nutrition and heavy metal accumulation of apple trees were investigated. The experiment was conducted using a completely randomized design with 4 replicates in dry conditions in Van, in the East Anatolia region of Turkey in 2000 and 2001. Sewage sludge was added to the soil at the rates of 0, 10, 20, 40 and 60 kg tree^{-1}. Barnyard manure was applied to the soil at a rate of 25 kg tree^{-1}. Two years' data showed that the addition of sewage …

Assessment Of Irrigation Schemes With Comparative Indicators In The Southeastern Anatolia Project, Hasan Deği̇rmenci̇, Hakan Büyükcangaz, Hayretti̇n Kuşcu

Turkish Journal of Agriculture and Forestry

In this study, 6 comparative indicators for the assessment of irrigation system performance were applied to 12 irrigation schemes, which were components of the Southeastern Anatolian Project, for the period 1997-2001. The output per unit cropped area, output per unit command, output per unit irrigation supply, output per unit water consumed, relative water supply and irrigation ratio were calculated as 1223-9436 $ ha^{-1}, 308-5771 $ ha^{-1}, 0.12-2.16 $ m^{-3}, 0.45-2.92 $ m^{-3}, 1.00-5.90, and 7-100%, respectively. ANOVA test results indicated that among the schemes the differences in the output per unit cropped area, output per unit irrigation supply, output per …

Risk Attitudes Of Farmers In Terms Of Risk Aversion: A Case Study Of Lower Seyhan Plain Farmers In Adana Province, Turkey, Turan Bi̇ni̇ci̇, A. Ali̇ Koç, Carl R. Zulauf, Ahmet Bayaner

Turkish Journal of Agriculture and Forestry

Exploring the attitude of farmers toward risk is important in understanding their managerial decisions, especially given the exposure of farmers to risky events such as drought. However, a survey of the literature finds no study of the risk attitudes of farmers in Turkey. Therefore, this study examines the risk attitudes of farmers in the Lower Seyhan Plain of Turkey. While some variation by utility function exists in the classification of the sampled farmers into risk averse and risk preferring categories, the overwhelming evidence is that the sampled farmers are risk averse. One hundred eighty-two out of 200 estimated Arrow-Pratt risk …

An Econometric Analysis Of Apricot Supply And Export Demand In Turkey, İlkay Dellal, A. Ali̇ Koç

Turkish Journal of Agriculture and Forestry

This study estimates a supply model for apricots and an export demand model for dried apricots for Turkey to provide unit-free measure coefficients for better supply and marketing management. Using parameter estimates from the models and sample average data, elasticities of long-run supply, price-yield and export of dried apricots were computed as 0.72, 0.54 and -0.87 respectively. From the price dependent export demand model, the price flexibility of dried apricots was calculated as -0.71. In this study, the import demand elasticities of dried apricots for major destination countries were estimated and found to be inelastic. An evaluation of aggregated household …

Determination Of The Agronomic Performances Of Some Oilseed Sunflower (Helianthus Annuus L.) Hybrids Grown Under Erzurum Ecological Conditions, Hakan Özer, Erdoğan Öztürk, Taşkin Polat

Turkish Journal of Agriculture and Forestry

In eastern Anatolia, the sunflower (Helianthus annuus L.) has been grown as a confectionary crop for a long time, but oilseed sunflower types have more recently been grown commercially. No information on the performance of oilseed sunflower hybrids for this region is, however, available. Therefore, during the 1998 and 2001 growing seasons, a field experiment was conducted to evaluate the agronomic performances and genotypic differences of some sunflower hybrids under Erzurum conditions. In this study 20 sunflower genotypes were used. The 2-year results showed that the genotypes differed significantly in all the characteristics investigated, except for kernel percentage. Similarly, the …

Detection And Characterization Of Plum Pox Potyvirus (Ppv) By Das-Elisa And Rt-Pcr / Rflp Analysis In Turkey, Gülşen Sertkaya, Çi̇ğdem Ulubaş Serçe, Kadri̇ye Çağlayan

Turkish Journal of Agriculture and Forestry

This study was conducted to determine the presence of plum pox virus (PPV) (family Potyviridae, genus Potyvirus) in different regions of Turkey and to characterize PPV isolates by serological and molecular techniques, including ELISA and PCR/ RFLP. Thus, leaf samples from different stone fruit species (almond, apricot, nectarine, peach, plum and sour and sweet cherry) exhibiting various types of symptoms related to PPV were collected from different parts of the canopy from randomly selected orchards in the main stone fruit growing areas in Turkey, except for Malatya province. Polyclonal antibodies were used to detect the presence of PPV in the …

Heterosis And Combining Ability For Yield Components And Fiber Quality Parameters In A Half Diallel Cotton (G. Hirsutum L.) Population^1, Hüseyi̇n Başal, İsmai̇l Turgut

Turkish Journal of Agriculture and Forestry

Combining ability and heterosis were determined in a population obtained from the half diallel crossing of 6 different cotton genotypes for yield components and fiber quality parameters. For breeding purposes, to improve the investigated characters some suitable parents were selected for different characters: DPL 5690 for number of bolls per plant, Acala SJ-5 for boll weight and fiber length; Nazilli-84 and Carmen for seed cotton yield and lint percentage; Tamcot CAMD-E for earliness and fiber fineness; and PD 6168 for fiber strength. When the crosses were evaluated for the investigated characters Tamcot CAMD-E x Carmen, Nazilli-84 x PD 6168, DPL …

Effects Of Different Soil Salinity Levels On Germination And Seedling Growth Of Safflower (Carthamus Tinctorius L.), Mehmet Demi̇r Kaya, Ari̇f İpek, Ahmet Öztürk

Turkish Journal of Agriculture and Forestry

Safflower (Carthamus tinctorius L.) is rated as moderately salt tolerant and it can produce profitable crops on saline soils. It is slightly more tolerant of salinity than barley but is more tolerant than wheat. Because salinity reduces germination and delays emergence, safflower stands tend to be irregular and crop yield is depressed. However, some varieties are less affected by salinity than others. In this study, we aimed to determine the effects of soil salinity levels (0.8, 2.5, 5.1, 8.7, 13.0, 15.2 and 23.0 dS m^{-1}) on germination and seedling growth of three safflower varieties, one of which is spiny (5-154 …

Determination Of Salt Tolerance Of Stock (Matthiola Tricuspidata) As A Potential Oil Crop, Mehmet Ali̇ Demi̇ral

Turkish Journal of Agriculture and Forestry

In this study the salt tolerance of stock (Matthiola tricuspidata) was investigated. For this purpose, a control and 4 different concentrations of NaCl + CaCl_2 were applied to plants grown under greenhouse conditions. Na, Cl and electrical conductivity (EC) analyses were conducted in soil, plant and leached samples. Yield, plant growth parameters and plant dry matter were also determined. All plants survived until the end of the experiments. Treatments affected the ion content and EC of leached and soil samples significantly. Increasing salinity conditions increased translocation of Na and Cl in plants. Flower numbers, seedpod numbers, and dry matter content …

Litter Decomposition Of Picea Orientalis, Pinus Sylvestris And Castanea Sativa Trees Grown In Artvin In Relation To Their Initial Litter Quality Variables, Temel Sariyildiz

Turkish Journal of Agriculture and Forestry

The aim of the present study was to determine the effects of the litter chemistry of spruce (Picea orientalis), pine (Pinus sylvestris) and chestnut (Castanea sativa) grown in the Artvin region on their decomposition rates. Freshly fallen litters from these species were analysed for total carbon, nitrogen, lignin, cellulose and hemicellulose. The litterbag technique was used to determine their mass loss in the field for 2 years. At intervals of 6, 12, 18 and 24 months, 5 litterbags of each species were collected and returned to the laboratory and then analysed for their mass losses. The results showed that differences …

Combustion Properties Of Calabrian Pine (Pinus Brutia Ten.) Wood Treated With Vegetable Tanning Extracts And Boron Compounds, Ergün Baysal, M. Kemal Yalinkiliç, Mehmet Çolak, Osman Göktaş

Turkish Journal of Agriculture and Forestry

Specimens prepared from Calabrian pine (Pinus brutia Ten.) wood were treated with borate-supplemented aqueous solutions of Calabrian pine bark powder, acorn powder, sumach leaf powder and gall-nut powder. Then, fire test methods containing flame source, without flame source and glowing stages was performed according to the ASTM E 160-50 American Standard. The results showed that the lowest temperature (323 °C) for the flame source stage was recorded for specimens treated with mixtures of boric acid and borax (BA and Bx). In the without flame stage, the lowest temperature (404 °C) was recorded for specimens treated with acorn powder and (BA …

Comparative Study Of Wood Density By Specific Amount Of Void Volume (Porosity), İlker Usta

Turkish Journal of Agriculture and Forestry

Various methods were progressively investigated to determine wood density within the most reliable void volume (porosity) values. Three softwood species of Bornmulleriana fir (Abies bornmulleriana Mattf.), Eastern spruce (Picea orientalis Lipsky), and Scots pine (Pinus sylvestris L.) grown indigenously in Turkey were selected to obtain a comparison among the green volume (GV), oven dry (OD) and maximum moisture content (MMC) methods. Volume definition had a great effect on density, which tended to vary significantly between and also within species caused by differences in the ratio of cell wall to air spaces. Accordingly: (a) GV might not give more accurate density …

Evaluation Of Land Use Potential And Suitability Of Ecosystems In Antakya For Reforestation, Recreation, Arable Farming And Residence, Şeref Kiliç, Suat Şenol, Fati̇h Evrendi̇lek

Turkish Journal of Agriculture and Forestry

It is essential that land use decisions made by local administrations be compatible with sustainable use and management principles of natural resources. In this study, we evaluated the use potential and suitability of 27 land mapping units of 4,891 ha in Antakya for three different land use types: (1) recreation- reforestation, (2) residence and (3) arable farming. For this purpose, land suitability evaluation was carried out using soil and land data, the ŞENOL land evaluation system, and a PC compatible ILSEN software package. The study showed that a total of 478 ha of land had the potential for residential use …

The Reaction Of Crotonic Anhydride With Scots And Corsican Pine: Investigation Of Kinetic Profiles And Determination Of Activation Energies, Ni̇lgül Özmen, Ni̇hat Sami̇ Çeti̇n

Turkish Journal of Agriculture and Forestry

The kinetics of the reaction of crotonic anhydride with Scots pine (Pinus sylvestris) and Corsican pine (Pinus nigra) using pyridine as catalyst/solvent was investigated and activation energies for the initial reaction determined. Activation energies were calculated from the Arrhenius equation using rate data obtained from time-course experiments repeated at several temperatures. In one method, reaction constants (k) were determined experimentally, while in the other method initial rates were extrapolated at time zero. With the rate constant method, activation energy values for Scots and Corsican pine were calculated as 39.0 (±5.8) and 30.3 (±6.8) kJ mol^{-1}, respectively. The method of initial …

Estimation Of The Effect Of Soil Salinity On Crop Yield Using Remote Sensing And Geographic Information System, Mehmet Ali̇ Çullu

Turkish Journal of Agriculture and Forestry

This study was conducted to estimate the effect of salinity on crop yield by employing a geographical information system (GIS) and remote sensing technologies. The saline soils of Arıcan village, located in the southeastern part of Harran Plain, were studied. Surface soil samples representing each soil series in the study area were collected and analyzed to generate an electrical conductivity (EC) map of the study area soils. Using ground truth information, satellite images were classified and land use classes were determined in the study area. The EC map, land use map, soil map and parcel map were combined and analyzed …

Effects Of Plant Density And Number Of Shoots On Yield And Fruit Characteristics Of Peppers Grown In Glasshouses, H. Yildiz Daşgan, Kazim Abak

Turkish Journal of Agriculture and Forestry

Plant density and pruning systems play a key role in the effective use of the area inside the greenhouse. Pepper (Capsicum annuum L.) cultivars, Amazon-long green and Balo bell-shape type, were grown in the winter cultivation period in a glasshouse. A constant space of 80 cm between rows with different within-row spacings (45 cm, 30 cm and 15 cm) and shoot numbers (between one and four shoots per plant) were applied to optimize plant density and number of shoots. Wider within-row spacing and higher shoot numbers per plant increased the number of leaves. However, the individual leaf blade area was …

Effect Of Indole-3-Butyric Acid And Different Strains Of Agrobacterium Rubi On Adventive Root Formation From Softwood And Semi-Hardwood Wild Sour Cherry Cuttings, Ahmet Eşi̇tken, Sezai̇ Erci̇şli̇, İsmai̇l Şevi̇k, Fi̇kretti̇n Şahi̇n

Turkish Journal of Agriculture and Forestry

This study was conducted to evaluate the effects of a range of Indole-3-butyric acid (IBA) concentrations (250, 500 and 750 mg 1^{-1}) alone and in combination with three strains of Agrobacterium rubi (A1, A16 and A18) on the rooting capacity of wild sour cherry (Prunus cerasus L.) softwood and semi-hardwood cuttings. The bacterial strains used in the present study were isolated from the foliage of pome fruits (from apple and pear orchards) growing in the eastern Anatolia region of Turkey. No rooting was observed on the cuttings of wild sour cherry with control treatment (no IBA or bacterial treatment) in …

Population Densities Of Liriomyza Huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae) In Insecticide-Treated And Non-Treated Cucumber Producing Greenhouses In The İzmir Region, Hasan Sungur Ci̇velek, Zeynep Yoldaş

Turkish Journal of Agriculture and Forestry

Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) is an important pest in cucumber greenhouses in Çamönü (Menderes, İzmir), Turkey. This study was carried out during the spring and autumn production seasons in 1999 and 2000 in two greenhouses belonging to a local farmer, each of them 1000 m^2 in size. The infested leaves from insecticide-treated and non-treated greenhouses were sampled weekly. The leaves were sampled weekly from both greenhouses and kept in our laboratory under observation to compare the number of emerging leafminer adults. Despite the applications, during three of the four seasons examined, pest density in the insecticide-treated greenhouse was not …

Evaporative Cooling Efficiency Of A Fogging System For Greenhouses, Hasan Hüseyi̇n Öztürk

Turkish Journal of Agriculture and Forestry

The objective of this study was to investigate the efficiency of fogging system (FS) for greenhouses. The experiments were carried out in a multi-span plastic greenhouse (PG), 105.6 m wide and 205 m long, made of 11 spans. The FS consists of a water softener and filters to prevent nozzle clogging, a water reservoir, pumps and a pressure regulator, and fog generating nozzles (FGN). The required pressure for FGN was 4.5 atm. Three nozzle lines with 82 FGN were installed in each span of the PG. At each nozzle line, 82 FGN were uniformly located at 2.5 m nozzle spacing. …

Correlation And Path Coefficient Analysis For Some Yield-Related Traits In Rice (Oryza Sativa L.) Under Thrace Conditions, Hali̇l Sürek, Necmi̇ Beşer

Turkish Journal of Agriculture and Forestry

The associations among yield components, and their direct and indirect influence on the grain yield of rice were investigated. For this purpose, 80 breeding lines derived from 11 different cross populations in the F_6 generation and their 10 parents were tested in a randomised complete block experiment design with two replications at the Thrace Agricultural Research Institute in 1995. According to the results from the first year, 49 breeding lines were selected, and they and their 10 parents were tested in a randomised complete block experiment design with three replications in the same institute in 1996. The phenotypic correlations among …

Qtl Mapping And Analysis Of Qtl X Nitrogen Interactions For Some Yield Components In Brassica Napus L., Muhammet Kemal Gül

Turkish Journal of Agriculture and Forestry

Nitrogen (N) plays a critical role in crop production. Nowadays, it is possible to detect quantitative trait loci (QTL), as well as their effects and positions on chromosomes, by new molecular and biometrical methods. A doubled haploid rapeseed population of 142 lines from the doubled winter rapeseed cultivars Mansholt's and Samourai, and a framework map derived from an RFLP map were used for the analysis of QTL and their interactions with N in terms of some yield components obtained from field trials in Brassica napus L. The interactions between traits and N were determined by variance analysis. Two QTL for …

Effect Of Growth Season On Forage Yields Of Different Brassica Cultivars Under Ankara Conditions, Suzan Altinok, Azi̇z Karakaya

Turkish Journal of Agriculture and Forestry

This research was carried out at the experimental field of Ankara University, Faculty of Agriculture, Department of Field Crops in Turkey in 1997 and 1998. Spring and summer seedings were employed in both years. The introduced kale cultivars Vates, Siberian and Premier (Brassica oleracea L. var. acephala), forage rape cultivar Emerald (Brassica rapa L.) and Collard cultivars Vates, Champion and Georgia Southern (Brassica oleracea L.) were used as the research materials. The effect of the growth season on forage Brassica yields was evident, and generally the yields of summer-grown cultivars were higher. The highest forage yields and crude protein contents …