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2001

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Articles 61 - 90 of 141

Full-Text Articles in Forest Sciences

Composition Of Honeys Collected From Eastern And South-Eastern Anatolia And Effect Of Storage On Hydroxymethylfurfural Content And Diastase Activity, Hayrullah Yilmaz, Ömer İrfan Küfrevi̇oğlu Jan 2001

Composition Of Honeys Collected From Eastern And South-Eastern Anatolia And Effect Of Storage On Hydroxymethylfurfural Content And Diastase Activity, Hayrullah Yilmaz, Ömer İrfan Küfrevi̇oğlu

Turkish Journal of Agriculture and Forestry

The chemical composition of honeys produced in Eastern and South-Eastern Anatolia (Turkey) was studied. For this aim, the composition of 45 honey samples collected from the mentioned regions and the effect of one year storage (20 ± 5ºC) on the diastase activity and hydroxymethylfurfural (HMF) content were determined. Compositional data measured in the fresh honeys were HMF, diastase number, moisture, invert sugar, sucrose, ash, proline, pH, free acid and lactone. Average values were as follows: HMF 3.3 mg kg^{-1}, diastase number 14.6, moisture 16.0%, invert sugar 70.3%, sucrose 1.8%, ash 0.1%, proline 53.0 mg/100g; pH 3.8, free acid 22.3 meq …

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Studies On Flower Types And Pollination Properties Of Some Vitis Species And Cultivars Used As Rootstocks, Bi̇rhan Marasali, Ni̇lgün Göktürk Baydar Jan 2001

Studies On Flower Types And Pollination Properties Of Some Vitis Species And Cultivars Used As Rootstocks, Bi̇rhan Marasali, Ni̇lgün Göktürk Baydar

Turkish Journal of Agriculture and Forestry

15 American rootstocks (Rupestris du Lot, 99 R, 110 R, 1103 P, 420 A, SO 4, 5 C, 44-53 M, 1616 C, Ramsey, 1613 C, 41 B, 5 BB, Fercal, Harmony) were used as plant materials. Because of the importance of rootstock breeding programs, the flower biology of rootstocks were studied. For this reason, the morphology and anatomy of the flowers and the productivity, viability, germination rate, size and shape classification of the pollens were examined. According to the results of the study, three flower types (male, functionally male and functionally female flowers) were determined. Rootstocks having functionally female flowers …

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Xylotroph Micromycetes Of Oak Trees In Azerbaijan Forests, Elşad Hüseyi̇n Jan 2001

Xylotroph Micromycetes Of Oak Trees In Azerbaijan Forests, Elşad Hüseyi̇n

Turkish Journal of Agriculture and Forestry

It is of great importance to study the activities of fungi in forest ecosystems for both protecting them and optimizing their functions. In this study, we present 130 species of xylotroph micromycetes found on six different species of oak in Azerbaijan. Of the species found, 54 were from 38 genera from 10 families of the Ascomycotina subdivision. Thirty-four were of the Pyrenomycetes class in which many have stromas or their peritheciums formed in dense groups. The majority of these species were found on wood in the initial phase of decomposition. The Loculoascomycetes and Discomycetes class were represented by 18 and …

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Variation In Growth Of 20-Year-Old Provenance Trial Of Sitka Spruce (Picea Sitchensis(Bong.)Carr.) In Great Britain, İlker Usta Jan 2001

Variation In Growth Of 20-Year-Old Provenance Trial Of Sitka Spruce (Picea Sitchensis(Bong.)Carr.) In Great Britain, İlker Usta

Turkish Journal of Agriculture and Forestry

Variation in growth of the cambial age (tree diameter) and tree volume was investigated in eight seed origins of Sitka spruce Picea sitchensis (Bong.) Carr.) grown at two sites in Great Britain. The trial seed origins were collected from 58 ºN to 41 ºN latitude, 134 ºW to 123 ºW longitude, and 0 m to 140 m altitude in the natural range of Sitka spruce that extends in a narrow coastal strip from Alaska to California (Alaska -AL,British Columbia -BC, Queen Charlotte Islands -QCI, North Washington -NW, South Washington -SW,North Oregon -NO,South Oregon -SO,California -CA). The experimental plantations were raised …

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Changes In Weed Response To 2,4-D Application With 5 Repeated Applications In Spring Wheat, Hüseyi̇n Zengi̇n Jan 2001

Changes In Weed Response To 2,4-D Application With 5 Repeated Applications In Spring Wheat, Hüseyi̇n Zengi̇n

Turkish Journal of Agriculture and Forestry

2,4-D amine and 2,4-D isooctylester were sprayed repeatedly in the spring of 5 consecutive years on spring wheat (Triticum aestivum L.cv.Kırik)in Erzurum during the years 1990-1994. The herbicide efficacy against all broad-leaved weeds and against the most common weed species was determined by comparing the number of weeds in untreated and treated plots. The most abundant weed species were Polygonum aviculare, Amaranthus retroflexus and Chenopodium albumin spring wheat. The effect of 2,4-D amine decreased after 3 or 4 years in A.retroflexus, C.album,Convolvulus arvensis, Acroptilon repens, Lactuca serriola, P.aviculare, Cirsium arvense and other broad-leaved weeds. Effects against Sinapis arvensis and Sisymbrium …

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Screening Of Wheat Varieties For Resistance To Head Scab Caused By Fusarium Graminearum Schwabe, Si̇bel Dervi̇ş Jan 2001

Screening Of Wheat Varieties For Resistance To Head Scab Caused By Fusarium Graminearum Schwabe, Si̇bel Dervi̇ş

Turkish Journal of Agriculture and Forestry

In this study, variability in pathogenicity among Fusarium graminearum isolates from different locations in Ohio was determined. The most virulent isolates from these locations were chosen and used in segregation studies to evaluate the resistance of some resistant by resistant winter wheat crosses to Fusarium head scab. Differences in pathogenicity levels were significant among isolates even from the same location. Several generalizations can be made about the segregating generations in this study. The results indicated that Ning 7840 carries multiple genes for resistance. In addition, we found that Freedom and Ning 7840 have at least one resistance gene different. Although …

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Heterologous Expression Of Genes In The Yeast Saccharomyces Cerevisiae, Numan Özcan Jan 2001

Heterologous Expression Of Genes In The Yeast Saccharomyces Cerevisiae, Numan Özcan

Turkish Journal of Agriculture and Forestry

Both an \alpha-amylase gene of Bacillus subtilis RSKK246 and a gene encoding \beta-glucanase from B.subtilis RSKK243 were cloned and expressed in both E.coli XL1-Blue MRF and B.subtilis YB886 by using the vectors pUC18 and pUB110 respectively. These genes were also cloned into the E.coli-yeast shuttle vectors pRS406 and pRS416 for transfer into the yeast Saccharomyces cerevisiae.These constructs carrying \alpha -amylase and \alpha -glucanase,genes which were cloned into the pRS406 vector,were expressed by integration into the yeast chromosome.These genes were also expressed in the yeast by autonomous replication of the ARS/CEN plasmid pRS416.This work demonstrates that genes belonging to B.subtilis can …

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Defining Effective Salt Leaching Regions Between Drains, Ömer Anapali, Üstün Şahi̇n, Taşkin Öztaş, Abdurrahman Hanay Jan 2001

Defining Effective Salt Leaching Regions Between Drains, Ömer Anapali, Üstün Şahi̇n, Taşkin Öztaş, Abdurrahman Hanay

Turkish Journal of Agriculture and Forestry

The application of sufficient amounts of leaching water by means of an effective method is very important in the management and reclamation of saline and sodic soils. Reclamation cannot be achieved with insufficient leaching water application, while excess water application may cause severe problems in soil. Knowledge of the leaching regions and intensities may help to control the amounts of leaching water through effective leaching methods in areas of limited leaching. This study was undertaken to define the vertical and horizontal leaching regions between drains,using geostatistical methods under laboratory conditions. Vertical and horizontal distribution patterns of soil salinity following leaching …

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Search For O-Type Plants In Sugar Beet, Mustafa Erdal Jan 2001

Search For O-Type Plants In Sugar Beet, Mustafa Erdal

Turkish Journal of Agriculture and Forestry

This research was started in 1995 in order to find O-types, which are important basic materials in breeding monogerm hybrid sugar beets, and to develop their male sterile parallels in six monogerm families previously bred in the Plant Breeding Department of the Sugar Institute. For this purpose, a total of 600 (100 from each family) O-type candidate fertile plants were crossed with testers which were known to be cytoplasmic male steriles (CMS) by mating one fertile and one male sterile plant in a cage insulated with cotton cloth. In crossing male sterile and fertile plants, a sufficient amount of seed …

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The Yield And Yield Components Of Some Narbonne Vetch (Vicia Narbonensis L.) Lines In Tokat Ecological Conditions, Uğur Büyükburç, Selahatti̇n İptaş Jan 2001

The Yield And Yield Components Of Some Narbonne Vetch (Vicia Narbonensis L.) Lines In Tokat Ecological Conditions, Uğur Büyükburç, Selahatti̇n İptaş

Turkish Journal of Agriculture and Forestry

This study was conducted under Tokat ecological conditions during 1993/94, 1994/95 and 1995/96. Fifteen narbonne vetch (Vicia narbonensis L.) lines obtained from ICARDA were used. The results of variance analyses showed that there were statistically significant differences among lines for some characters. The highest seed yield (217.2 kg/da) was produced by the line 2466 and the lowest (144.9 kg/da) by the line 2380. 1000-seed weight ranged between 158.7 and 301.2 g, whereas biological yield ranged between 547.4 and 848.1 kg/da. At the end of this study, it was found that the lines 2466 and 2461 had good performance while the …

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Water-Use Efficiency (Wue) And Change In The Yield-Response Factor (Ky) Of Cotton Irrigated By An Irrigation Drip System, Ahmet Ertek, Riza Kanber Jan 2001

Water-Use Efficiency (Wue) And Change In The Yield-Response Factor (Ky) Of Cotton Irrigated By An Irrigation Drip System, Ahmet Ertek, Riza Kanber

Turkish Journal of Agriculture and Forestry

This study was conducted to investigate the effect of water-use efficiency and changes in the yield-response factor of cotton irrigated with an irrigation 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), three plant-pan coefficients (Kcp1: 0.75; Kcp2: 0.90, Kcp3: 1.05) and two different soil surface wetting percentages (P1: 0.70 and P2: based on cover percentage of the crop). The first irrigation was applied when the available soil water content in the 120 cm of the soil profile …

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An Investigation Of Winter Harvesting On Steep Terrain In Forestry, Hafiz Hulusi̇ Acar, Bi̇lal Di̇nç Jan 2001

An Investigation Of Winter Harvesting On Steep Terrain In Forestry, Hafiz Hulusi̇ Acar, Bi̇lal Di̇nç

Turkish Journal of Agriculture and Forestry

Forest productions are very difficult, expensive and time consuming. In the Black Sea Region, forests cover generally high and steep slopes of mountainous areas. Therefore, the problems of forestry production studies are gaining in importance. In forestry production studies, the absence of mechanization level and its application causes qualitative and quantitative losses. In this study, the time required for felling and skidding operations in winter were determined and factors affecting logging were observed and recorded. The data obtained were later analyzed. According to this study, productivity at winter harvesting for felling operations is 1,948 m^3/h, for skidding with human power …

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The Chemistry Of Fresh Tomato Flavor, Emi̇n Yilmaz Jan 2001

The Chemistry Of Fresh Tomato Flavor, Emi̇n Yilmaz

Turkish Journal of Agriculture and Forestry

Tomato flavor results from taste components, aromatic volatiles and a complex interaction between them. Lack of characteristic flavor in supermarket tomatoes is a common consumer complaint. Sugars, organic acids, free amino acids, and salts are the main taste components. With over 400 volatile compounds identified, only thirty are present in concentrations over one ppb and of these, only 16 contribute significantly to the perceptible flavor. Radiolabeled substrate and enzyme denaturation studies have indicated involvement of some pathway enzymes in the biosynthesis of tomato aroma compounds. Studies of fresh tomato flavor are important for the efforts at improving fruit quality through …

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Oil Content And Oil Quality Properties Of Some Grape Seeds, Ni̇lgün Göktürk Baydar, Murat Akkurt Jan 2001

Oil Content And Oil Quality Properties Of Some Grape Seeds, Ni̇lgün Göktürk Baydar, Murat Akkurt

Turkish Journal of Agriculture and Forestry

In the present study, the oil contents and some oil quality properties of seeds taken from 18 grape cultivars were examined. The results showed that the oil concentration of seeds ranged from 11.6 to 19.6%. Grape seeds were rich in oleic and linoleic acids, ranging from 17.8 to 26.5% and 60.1 to 70.1%, respectively. The degree of unsaturation in the grape seed oil was over 86%, and the average concentration of total tocopherol in oil was around 454 mg/kg. The results indicate that grape seed oil could be an important source for production of an edible vegetable oil and lowering …

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Isolation And Characterization Of Sequences Homologous To The Tobacco Clone Axi 1 (Auxin Independent) From A Vicia Sativa Nodule Cdna Library, Yeşi̇m Yalçin Mendi̇, Seli̇m Çeti̇ner, Ton Bisseling Jan 2001

Isolation And Characterization Of Sequences Homologous To The Tobacco Clone Axi 1 (Auxin Independent) From A Vicia Sativa Nodule Cdna Library, Yeşi̇m Yalçin Mendi̇, Seli̇m Çeti̇ner, Ton Bisseling

Turkish Journal of Agriculture and Forestry

In this research, partial nucleotide sequences of the axi 1 gene, which is related to auxin perception and transduction, isolated from Vicia sativa using cDNA library screening were investigated. Four V. sativa cDNA clones representing homologous of the tobacco axi 1 (auxin independent) cDNA clone were isolated and characterized. With sequence analysis two different clones were observed, called 10/3a and 16/3b. Sequences about 500 bp from the 5' end and 450 bp from the 3' end were determined from the 10/3a clone. The sequences from the 5' end of cDNA clone 10/3a shared about 58 % similarity at the nucleotide …

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Dynamic Behavior Of The Onion Price In Turkey, Hali̇l Fi̇dan, Ali̇ Koç Jan 2001

Dynamic Behavior Of The Onion Price In Turkey, Hali̇l Fi̇dan, Ali̇ Koç

Turkish Journal of Agriculture and Forestry

This study analyzes the onion market and the dynamic behavior of real onion prices in Turkey. The price responsiveness of the supply, demand and export of dry onions was determined. The equilibrium price for producers was derived using the market closing condition of the partial equilibrium model. Price flexibility was also estimated using wholesale market data. The results verified the existence of cyclical behavior of onion prices in the market. The elasticities evaluated at the sample mean were 0.26, -1.02, and -0.24 for supply, export demand and flexibility respectively. The household consumption data indicates that per capita consumption of onions …

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Provenance Variations In 3-Year-Old Lebanon Cedar (Cedrus Libani A. Rich.) Seedlings, Ali̇ Demi̇rci̇, Nebi̇ Bi̇li̇r Jan 2001

Provenance Variations In 3-Year-Old Lebanon Cedar (Cedrus Libani A. Rich.) Seedlings, Ali̇ Demi̇rci̇, Nebi̇ Bi̇li̇r

Turkish Journal of Agriculture and Forestry

This research was realized to study the morphological characteristics of 3-0 years old seedlings, obtained from seeds, which were collected from 22 Lebanon cedar seed stands. The seedlings were grown at the Nursery of the Black Sea Technical University. Seedling morphological properties were studied including height, root-collar diameter, number of branches, the length of the longest branch, and fresh and dry weights of root, stem, and seedlings. Means of these properties were found to be 20.8 cm for height, 4.1 mm for root-collar diameter, 7.1 for number of branches, 7.2 cm for the length of the longest branch, 3.6 g …

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Determination Of Soil Water Content After Fallow, Winter And Spring Sown Lentil In Dry Farming Areas, M. Sai̇t Adak Jan 2001

Determination Of Soil Water Content After Fallow, Winter And Spring Sown Lentil In Dry Farming Areas, M. Sai̇t Adak

Turkish Journal of Agriculture and Forestry

This research was carried out from 1993 through 1995 for a two-year period in dry farming areas of Haymana/Ankara. The aim of the research was to determine the available water content of the 0-60 and 0-90 cm soil depth layers for wheat after fallow periods and after winter and spring crops of lentils under two different soil tillage treatments. According to the experimental results, the highest available water content was measured in fallow plots (28.6% (rototiller 0-60 cm) and 94.6% plough 0-90 cm). The available water contents were found to be -14.9% (plough 0-60 cm) and 14.8% (rototiller 0-90 cm) …

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In Situ Localisation Of Axi 1 (Auxin Independent) Gene In Rhizobium Leguminosarum Inoculated Root Tips Of Pea Plants, Yeşi̇m Yalçin Mendi̇, Katharina Pawlowski, Seli̇m Çeti̇ner Jan 2001

In Situ Localisation Of Axi 1 (Auxin Independent) Gene In Rhizobium Leguminosarum Inoculated Root Tips Of Pea Plants, Yeşi̇m Yalçin Mendi̇, Katharina Pawlowski, Seli̇m Çeti̇ner

Turkish Journal of Agriculture and Forestry

Axi 1 is the only characterized auxin independent gene in tobacco plants. In this study, the effect of axi 1 gene on cortical cell division during different stages of nitrogen fixation and on the role of polar auxin transport were investigated. Root and nodule samples were taken from pea seedlings 24 hours, 48 hours, 6 days and 10 days after inoculation with R. leguminosarum PRE strain. Using in situ hybridisation, the location of the axi 1 gene expression in root and nodule tissues was identified. The results showed that in root tissues inoculated with Rhizobia, the axi 1 gene is …

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Production Of Ice Cream With Cola Extract, Muhammet Dervi̇şoğlu, Fehmi̇ Yazici Jan 2001

Production Of Ice Cream With Cola Extract, Muhammet Dervi̇şoğlu, Fehmi̇ Yazici

Turkish Journal of Agriculture and Forestry

In this study, the use of cola extract and cola flavor in ice cream production were investigated. Cola extract was used at rates of between 0 and 1.5% based on mix weight. The samples with Na_2CO_3 (between 0 and 20% and based on the weight of cola extract) were used to balance the acidic taste of the samples due to the low pH of the cola extract. Cola flavor was used at rates of between 0 and 0.15% based on mix weight. According to the sensory evaluation results, the ice cream containing 0.75% cola extract, 15% Na_2CO_3 and 0.10% cola …

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Kinetic Studies With Crude Tomato Lipoxygenase, Emi̇n Yilmaz Jan 2001

Kinetic Studies With Crude Tomato Lipoxygenase, Emi̇n Yilmaz

Turkish Journal of Agriculture and Forestry

Crude tomato lipoxygenase (LOX) from ripe Florida47 tomatoes was used in this study. Extracted crude LOX was assayed spectrophotometrically. The effects of different buffers and pHs, substrate preparations, temperature and tissue location on LOX activity were evaluated. The enzyme was most active with MES buffer at a pH of 6.0 and a temperature of 25ºC. The best substrate was the first preparation with linoleic acid/Tween 20 at a ratio of 1:1.5. The kinetic parameters determined under the best conditions were a Km of 4.198 mM and a Vmax of 0.84 mM/min. The enzyme was heat labile, and most activity was …

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Water Diffusion Coefficients Of Selected Legumes Grown In Turkey As Affected By Temperature And Variety, Ferda Seyhan Gürtaş, M. Mehmet Ak, E. Özgül Evranuz Jan 2001

Water Diffusion Coefficients Of Selected Legumes Grown In Turkey As Affected By Temperature And Variety, Ferda Seyhan Gürtaş, M. Mehmet Ak, E. Özgül Evranuz

Turkish Journal of Agriculture and Forestry

The kinetics of water absorption by chickpeas (Koçbaşı, Kuşbaşı), lentils (green Pul) and beans (Battal, Dermason, Horoz, Şeker) grown in Turkey were studied by a gravimetric method during soaking at 15, 25 and 40ºC to determine moisture diffusivity of these selected legumes. The water diffusion coefficients of the legumes were in the range 9.71x10^{-11} - 5.98x10^{-10} m^2/s for the chickpeas, 3.53x10^{-10} - 1.33x10^{-9} m^2/s for the lentils and 4.35x10^{-11} - 3.79x10^{-9} m^2/s for the beans. An Arrhenius-type equation described the strong temperature effect on the diffusion coefficient with activation energies of 48.6-49.8 kJ/g-mol for chickpeas, 39.7 kJ/g-mol for lentils, and …

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Withdrawal Strength Of Dowels In Plywood And Oriented Strand Board, Yusuf Zi̇ya Erdi̇l, Carl A. Eckelman Jan 2001

Withdrawal Strength Of Dowels In Plywood And Oriented Strand Board, Yusuf Zi̇ya Erdi̇l, Carl A. Eckelman

Turkish Journal of Agriculture and Forestry

Plywood and oriented strand board (OSB) are being used increasingly in the construction of upholstered furniture frames. Yet there is little information available concerning the holding strength of various fasteners, and, in particular, dowels in these materials. A study was conducted accordingly, to obtain basic information about the holding strength of dowels in both plywood and oriented strand board. Results of the tests were incorporated into predictive expressions that allow designers to estimate withdrawal strength as a function of the diameter of the dowels, their depth of embedment and the density of the composite material. Given the variability of the …

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Comparing Cotton Evapotranspirations Estimated By Micrometeorological And Water Budget Methods, Mustafa Ünlü, Riza Kanber, Kenan Di̇ker, Pasquale Steduto Jan 2001

Comparing Cotton Evapotranspirations Estimated By Micrometeorological And Water Budget Methods, Mustafa Ünlü, Riza Kanber, Kenan Di̇ker, Pasquale Steduto

Turkish Journal of Agriculture and Forestry

This study aimed at comparing actual water consumption of cotton obtained by the water balance method under full and limited irrigation conditions, with that estimated by a micrometeorological method (energy balance), which is being widely used nowadays. Results indicated that in the first year the total irrigation water applied was 438 mm, whereas in the second year it was 199 mm. Deep percolation losses were were 6 and 0 mm, respectively, in the first and second year of the experiment. The evapotranspirations of cotton under full irrigation condition were 496 and 629 mm for the energy balance and water budget …

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Effects Of Different Seeding Rates And Cutting Times On The Forage Yield And Forage Quality Of Autotetraploid Perennial Rye (Secale Montanum Guss.), İlknur Akgün, Meti̇n Tosun, Mahmut Taşpinar, Sevi̇m Sağsöz Jan 2001

Effects Of Different Seeding Rates And Cutting Times On The Forage Yield And Forage Quality Of Autotetraploid Perennial Rye (Secale Montanum Guss.), İlknur Akgün, Meti̇n Tosun, Mahmut Taşpinar, Sevi̇m Sağsöz

Turkish Journal of Agriculture and Forestry

This research was carried out in 1995-97, in Erzurum ecological conditions, in order to study the effects of different seeding rates (100, 200, 300, 400 and 500 seeds/m^2) and cutting times (at shooting, boot, heading and flowering stages) on hay yield and quality. The effects of seeding rates on fresh and dry hay yields, crude protein content and crude protein yield were significant while P, Ca, Mg, K, and ash contents and tetany value were not significant, based on the research. According to cutting times, all characteristics examined showed significant differences. Delayed cuttings applied at the flowering stage reduced fresh …

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Evaluation Of Yield And Yield Components In Inbred Maize Lines I. Heterosis And Line X Tester Analysis Of Combining Ability, Şevket Meti̇n Kara Jan 2001

Evaluation Of Yield And Yield Components In Inbred Maize Lines I. Heterosis And Line X Tester Analysis Of Combining Ability, Şevket Meti̇n Kara

Turkish Journal of Agriculture and Forestry

In maize, three male testers and six female lines together with their 18 F_1 hybrids were evaluated to study the general and specific combining ability estimates and heterosis following line x tester approach. Analysis of variance indicated the existence of significant variation among F_1 and parents for all characteristics. Average heterosis was significant for all characteristics studied and was positive, except for days to tasseling, with the average yield of hybrids being 79.8% above that of the parents. In view of the general combining ability effects of the parents, the parental lines YUZ P709 and FR 64A were identified as …

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The Xylotroph's Macromycetes On Beech In Azerbaijani Forests, Elşad Hüseyi̇n, Faruk Selçuk Jan 2001

The Xylotroph's Macromycetes On Beech In Azerbaijani Forests, Elşad Hüseyi̇n, Faruk Selçuk

Turkish Journal of Agriculture and Forestry

The aim of this study is to investigate the species composition and significance of beech-wood decomposing macromycetes. A total of 101 species of macromycetes were found on beech (Fagus orientalis Lipsky) in Azerbaijani forests. All species of xylotophic macromycetes belonged to 52 genera and 13 families of the orders Aphyllophorales, Polyporales, Agaricales and Auriculariales from the subdivision Basidiomycotina. The greatest part (79%) of xylotrophic species is represented by the order Aphyllophorales, species of Polyporales compose 10.9%, Agaricales 8.9%, and only one species belonging to the order Auriculariales. The Poriaceae family takes first place in terms of the number of species …

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Evaluation Of Stand Homogeneity And Stem Quality In Ash (Fraxinus Angustifolia, Wahl.) Stands, Fi̇kret Kapucu, Hakki Yavuz, Altay Uğur Gül Jan 2001

Evaluation Of Stand Homogeneity And Stem Quality In Ash (Fraxinus Angustifolia, Wahl.) Stands, Fi̇kret Kapucu, Hakki Yavuz, Altay Uğur Gül

Turkish Journal of Agriculture and Forestry

This study presents the results of a study conducted to determine stem quality and the homogeneity of stands of ash (Fraxinus angustifolia Wahl.) in natural and plantation stands in the central and western Black Sea Regions in Turkey. The results obtained from this study can be summarized as follows: (i) According to homogeneity index values, plantations are more homogeneous than natural ash stands, (ii) The homogeneity index values of natural ash stands and plantations are similar to the values of some even-aged stands given in the literature, (iii) There is a statistically significant difference between the stand value of plantations …

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Determining Irrigation Possibilities And Agricultural Problems In The Wheat Growing Areas Of Ankara, Konya And Eskişehir Provinces, Zeynep Dernek Jan 2001

Determining Irrigation Possibilities And Agricultural Problems In The Wheat Growing Areas Of Ankara, Konya And Eskişehir Provinces, Zeynep Dernek

Turkish Journal of Agriculture and Forestry

This study was conducted to determine the agricultural technical conditions and irrigation systems for obtaining high yields in wheat production. A questionnaire was prepared and applied to farmers growing wheat in Ankara, Konya and Eskişehir in 1996. After analyzing the data, we determined the water resources, the amount of water used for wheat production, the allocation of crops, and the technical and financial problems faced by farmers in the research area. The findings of the study showed that 74% of irrigation water is high quality, and ground water and surface water are used in almost equal amounts. Depending on the …

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Factors Influencing Spatial Variability In Nitrogen Processing In Nitrogen-Saturated Soils, Frank S. Gilliam, Charles C. Somerville, Nikki L. Lyttle, Mary Beth Adams Jan 2001

Factors Influencing Spatial Variability In Nitrogen Processing In Nitrogen-Saturated Soils, Frank S. Gilliam, Charles C. Somerville, Nikki L. Lyttle, Mary Beth Adams

Biological Sciences Faculty Research

Nitrogen (N) saturation is an environmental concern for forests in the eastern U.S. Although several watersheds of the Fernow Experimental Forest (FEF), West Virginia exhibit symptoms of Nsaturation, many watersheds display a high degree of spatial variability in soil N processing. This study examined the effects of temperature on net N mineralization and nitrification in N-saturatedsoils from FEF, and how these effects varied between high N-processing vs. low N-processingsoils collected from two watersheds, WS3 (fertilized with [NH4]2SO4) and WS4 (untreated control). Samples of forest floor material (O2 horizon) and mineral soil (to a 5-cm depth) were taken from three subplots …

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