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1998

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Articles 91 - 120 of 594

Full-Text Articles in Life Sciences

Selection Of Table Cornelian Cherry ( Cornus Mas L.) Types In Çoruh Valley, Muharrem Güleryüz, İbrahim Bolat, Lütfi Pirlak Jan 1998

Selection Of Table Cornelian Cherry ( Cornus Mas L.) Types In Çoruh Valley, Muharrem Güleryüz, İbrahim Bolat, Lütfi Pirlak

Turkish Journal of Agriculture and Forestry

The aim of this selection research was to determine the having large fruits and high yielded of cornelian cherries ( Cornus mas L.) grown in Çoruh valley during 1994-1995. Forty types were choosen in terms of fruit size and productivity in the first year. Fifteen of these types which were found to be superior for consumption were selected using weighted rankit method in the first year, and the second year, the fruit characteristic of those types were evaluated. The fruit characteristics for the selected types were ranged 2.907-3.906 g for fruit weights, 5.950-10.707 for flesh/stone ratio, 11.5-16.8% for TSS, 43.78-76.75 …

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Genetic Basis Of Variation In Linseed ( Linum Usitatissimuml.) Cultivars, Orhan Kurt, G. M. Evans Jan 1998

Genetic Basis Of Variation In Linseed ( Linum Usitatissimuml.) Cultivars, Orhan Kurt, G. M. Evans

Turkish Journal of Agriculture and Forestry

This investigation was conducted at the University of wales in 1991-1994. The work described in this paper concerned with the genetic basis of variation in important characters of linseed ( Linum usitatissimum L.) A 8x8 full diallel cross including reciprocals was carried out using the cultivars Linda, Lidgate, Cristal, Antares, Barbara, Blue-Chip, Norman and McGregor and eight characters, namely, days to flowering, plant height, number of basal branches per plant, number of seeds per capsule, 1000-seed weight, seed yield per plant, total plant weight and harvest index investigated. The results were subjected to several standard systems of analysis (1, 2, …

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A Research To Determine The Suitable Rice ( Oryza Sativa L.)Harvesting Time, Halil Sürek, Necmi Beşer Jan 1998

A Research To Determine The Suitable Rice ( Oryza Sativa L.)Harvesting Time, Halil Sürek, Necmi Beşer

Turkish Journal of Agriculture and Forestry

The objective of this study was to determine the suitable rice harvesting time to obtain high paddy yield and quality milled rice. The experiment was conducted in a randomized split block design with four replications under continuous flood irrigation in 1988, 1989, and 1990. Three planting times were praticed at May 10, May 20; and May 30. Four harvesting times were applied at 35, 42, 49, and 56 days after flowering (DAF). This study showed that maximum paddy yield and total milled rice, minimum berakage during milling, minimum unfilled and partially filled grains, acceptable moisture content, minimum chalky kernel in …

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Issues Related To Marketing And Extension For Sustainable Agricultural Production In Turkey, Sedef Akgüngör, Taner Kumuk Jan 1998

Issues Related To Marketing And Extension For Sustainable Agricultural Production In Turkey, Sedef Akgüngör, Taner Kumuk

Turkish Journal of Agriculture and Forestry

Sustainable agriculture, although a difficult term to define operationally, includes the practice of low input agricultural production technologies. An important condition to adopt these technologies is the access to markets for low input agricultural products. Ability to market these products at profitable prices would provide incentives for farmers to adopt the necessary methods. Contract farming is considered to be an effective means to introduce new production technologies to the farmers by providing assurance on prices and markets for agricultural products. Public extension agencies in developing countries may therefore be concerned to direct their efforts to introduce contract farming models to …

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The Effect Of Prescribed Fire On The Natural Regeneration Success Oflebanon Cedar ( Cedrus Libani A. Rich.) At Antalya-Kaş Locality, Melih Boydak, Fikret Işik, Bayram Doğan Jan 1998

The Effect Of Prescribed Fire On The Natural Regeneration Success Oflebanon Cedar ( Cedrus Libani A. Rich.) At Antalya-Kaş Locality, Melih Boydak, Fikret Işik, Bayram Doğan

Turkish Journal of Agriculture and Forestry

With this study the effect of prescribed fire on the natural regeneration success of Lebanon Cedar ( Cedrus libani A. Rich.) by shelterwood method was investigated at Antalya-Kaş localitiy. Split plot design with three replications was applied as experimental design. Prescribed fire was applied to slash pile at one of each main plot while the other was left as control. Main plots were divided into two subplots and equal number of seeds were used at each subplot for additional seeding by applying broadcast seeding (full seeding) or drill sowing methods. Seedling survival was recorded each year and the height growth …

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Some Factors Affecting On Determination And Measurement Oftomato Firmness, Ali Batu Jan 1998

Some Factors Affecting On Determination And Measurement Oftomato Firmness, Ali Batu

Turkish Journal of Agriculture and Forestry

Firmness is one of the most important factor for determination of tomatoes quality. Distructive measurement of tomato firmness is one of the evaluation methods of fruit firmness. The Universal Instron is most common used machine for measurement of most adeqequate fruit firmness. During destructive measurement of firmness considedation of force or deformation values as a firmness of fruits could give incorrect result and taking epicarp strength over deformation values is more accurate to concern the firmness of tomato. Two of possible minimum firmness limits were suggested for tomato fruits at the point of retail marketing or using at home. All …

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Sorption Of Aldicarb Sulfoxide By Samples Of Some Calcareous Soils From Turkey, Kemal Y. Gülüt, Mahmut Sayin Jan 1998

Sorption Of Aldicarb Sulfoxide By Samples Of Some Calcareous Soils From Turkey, Kemal Y. Gülüt, Mahmut Sayin

Turkish Journal of Agriculture and Forestry

Sorption of aldicarb and aldicarb sulfoxide was investigated spectrophotometrically on 16 soil samples. Ten of them were from the Çukurova region. The results showed that organic matter is the single soil property to give correlation with sorption of aldicarb. Clay minerals are also important in sorption but their effect is masked by fine carbonates and organic matter. CaCO 3 sorbs aldicarb weakly. Aldicarb sulfoxide was also sorbed by soil constituents very weakly.

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Effects Of Short Trem High Carbon Dioxide Treatment On Tomato Ripening, Ali Batu, A. K. Thompson Jan 1998

Effects Of Short Trem High Carbon Dioxide Treatment On Tomato Ripening, Ali Batu, A. K. Thompson

Turkish Journal of Agriculture and Forestry

Tomato ( Lycopersicon esculentum Mill.) fruits (Cv Criterium) were harvested at the mature green stage and stored at 13°C in controlled atmosphere (CA) conditions for 1, 3 and 5 days. The CA conditions were 5, 10, 20, 40 and 60% CO 2 all with 5.5%O 2 plus air as control. The tomatoes were then stored at 20°C in air until they were fully ripe. At that time colour, firmness, titratable acidity, total soluble solids (TSS) and days to ripening were measured. Fruit exposed to CO 2 for 5 days subsequently ripened more slowly than those exposed only one day. The …

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Studies On The Cold Hardiness Of Some Temperate Zone Fruitspecies And Cultivars, Ayzin B. Küden, Ali Küden, Sevgi Paydaş, Nurettin Kaşka, Burhanettin İmrak Jan 1998

Studies On The Cold Hardiness Of Some Temperate Zone Fruitspecies And Cultivars, Ayzin B. Küden, Ali Küden, Sevgi Paydaş, Nurettin Kaşka, Burhanettin İmrak

Turkish Journal of Agriculture and Forestry

The research was carried out on apple, peach, nectarine and apricot cultivars during 1992-1994. In this work, the cold hardiness of apple, peach, nectarine and apricot cultivars were investigated. For this purpose, the relationship between the carbonhydrates or plant nutrient elements and the cold hardiness of the cultivars were investigated by viability tests. According to the results, apples and among them Granny Smith and Starkrimson cultivars, J.H. Hale and Monroe peach cultivars among the peaches, Maygrand among the nectarines and Precoce de Colomer and Canino apricot cultivars among the apricots were found as the most cold resistant cultivars. This cultivars …

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The Effects Of Some Citrus Rootstocks On Fruit Productivity Of Some Important Orange,Grapefruit, Lemon And Mandarin Cultivars In Çukurova Region, Önder Tuzcu, Mustafa Kaplankiran, Murat Şeker Jan 1998

The Effects Of Some Citrus Rootstocks On Fruit Productivity Of Some Important Orange,Grapefruit, Lemon And Mandarin Cultivars In Çukurova Region, Önder Tuzcu, Mustafa Kaplankiran, Murat Şeker

Turkish Journal of Agriculture and Forestry

This study was carried out under Çukurova (East Mediterranean region) conditions in order to determine the most definite effects of Common sour orange, Brasilian sour orange, Yuzu, Troyer and Carizzo citranges, Beneke trifoliate orange, Cleopatra mandarin, Volkameriana, Taiwanica, Rough lemon, Citrumelo 1452 rootstocks on the fruit yield of the Washington Navel, Valencia Late, Moro Blood and Shamouti oranges; Marsh Seedless and Redblush grapefruits; Kütdiken and Italyan Memeli lemons and Satsuma mandarin cultivars during 1993-1995. Sour orange showed medium performance on the productivities of orange cultivars. Carrizo citrange and Citrumelo 1452 for Washington Navel; Citrumelo 1452, Carrizo and Troyer citranges for …

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A Study On Determining Input And Cost In Tea Production In Shoreline Of Çayeli Town, Vedat Dağdemi̇r, İhsan Özçelebi̇ Jan 1998

A Study On Determining Input And Cost In Tea Production In Shoreline Of Çayeli Town, Vedat Dağdemi̇r, İhsan Özçelebi̇

Turkish Journal of Agriculture and Forestry

This study has been carried out in Rize-Çayeli production region with the purpose of determining the input and the cost in tea production. The data necessary for the study was obtained by means of the questionnaire applied in the compaines. Taking research area between December 20 th, 1992 and January 5 th, 1993. In the research area, the questionnaire out at 152 companies of which 112 were in the first group (

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Investigations On The Fertilization Biology Of Some Summer Apple Varieties, Sinan Eti̇, Nurettin Kaşka, Ali Küden, Mürevvet Ilgin Jan 1998

Investigations On The Fertilization Biology Of Some Summer Apple Varieties, Sinan Eti̇, Nurettin Kaşka, Ali Küden, Mürevvet Ilgin

Turkish Journal of Agriculture and Forestry

In this study, fertilization biology of 3 summer apple varieties, namely "Summerred", "Jerseymac" and "Raritan", grown in Pozanti ecological conditions, was investigated. For this purpose, the pollen viability, germination capacity and production level of these 3 apple varieties were tested in vitro. The percentage of fruit-set obtained from free, self and cross-pollination experiments performed in vivo. In order to determine the parthenocarpic fruit setting ability, the flowers were emasculated and isolated. Additionally, the fruit-sizes were determined and the number of seeds per fruit were counted in all experiments. As far as the pollen viability, production level and morphological homogenity of …

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The Distribution, Cultural Characteristics, And Pathogenicity Ofdrechslera Sorokiniana In Wheat And Barley Fields In Erzurum Region, Cafer Eken, Erkol Demi̇rci̇ Jan 1998

The Distribution, Cultural Characteristics, And Pathogenicity Ofdrechslera Sorokiniana In Wheat And Barley Fields In Erzurum Region, Cafer Eken, Erkol Demi̇rci̇

Turkish Journal of Agriculture and Forestry

In this study Drechslera sorokiniana incidence was determined on subcrown internod and crowns of wheat and barley samples collected from Erzurum region in 1994 and 1995. Mycelial development and sporulation were investigated in the laboratory in 3 light periods and 4 agar media. Furthermore, pathogenicity tests were carried out in greenhouse on five wheat cultivars in pots. Under the field conditions, the mean percentages of disease ratios were found 46.8 % in wheat, and 51.1 % in barley in 1994; 48.9 % in wheat and 54.3 % in barley in 1995. During study, subcrown internod and crown 208 isolates of …

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Detection Of Crown Gal Agent ( Agrobacterium Tumefaciens) Ingrapevine Propagating Material, Kemal Benli̇oğlu, Meriç Özakman Jan 1998

Detection Of Crown Gal Agent ( Agrobacterium Tumefaciens) Ingrapevine Propagating Material, Kemal Benli̇oğlu, Meriç Özakman

Turkish Journal of Agriculture and Forestry

Polyclonal antiserum produced against Agrobacterium tumefaciens (biovar 3) reacted in immunofluorescent test with biovar 3 strains of A.tumefaciens,causal agent of crown gal, from Central Anatolia. The antiserum did not react with A.tumefaciens biovar 1 (except for 1/200 dilution), biovar 2, other plant pathogens and symbionts. Vacuum extraction procedure were applied to recover A.tumefaciens from xylem vessels of one year old dormant grape cuttings. IFAS and selective media were used to detect bacteria. A.tumefaciens (biovar 3) was recovered from six cuttings of 8 infected vines and seven of 150 apparently healthy vines in Central Anatolia. The sensitivity thershold of the vacuum …

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Effect Of Butylated Hydroxytoluene And Butylated Hydroxyanisole Onsome Properties Of Kidney Fat And Tail Fat During Frozen Storage, Ömür Atay, A. Hamdi Ertaş Jan 1998

Effect Of Butylated Hydroxytoluene And Butylated Hydroxyanisole Onsome Properties Of Kidney Fat And Tail Fat During Frozen Storage, Ömür Atay, A. Hamdi Ertaş

Turkish Journal of Agriculture and Forestry

Some physical and chemical properties of kidney fat (obtained from cattle) and tail fat (obtained from sheep) were determined in this study. Effects of butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA) and BHT+BHA on free fatty acids (FFA) contents, thiobarbituric acid (TBA) values and peroxide number were also examined during frozen storage at -18°C for 9 months. The following values were determined for kidney fat; melting point 47°C, saponification number 193, iodine number 42, refractive index (n D 40 ) 1.480, unsaponificable material 0.72%, titre degree 44.0°C. The following values were determined for tail fat; melting point 38°C, saponification number 191, …

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In Vitro Multiplication Of Salep Orchids, Growing Commonly In The Eastmediterranean Region Of Turkey By Embriyo Culture, Kadriye Çağlayan, Ayşe Özavci, Akif Eskalen Jan 1998

In Vitro Multiplication Of Salep Orchids, Growing Commonly In The Eastmediterranean Region Of Turkey By Embriyo Culture, Kadriye Çağlayan, Ayşe Özavci, Akif Eskalen

Turkish Journal of Agriculture and Forestry

Possiblities of in vitro multiplication of salep orchids, which have a great danger of extinction from nature, was investigated. Orchis anatolica Boiss, Orhcis coriophora L., Ophyrs bornumuelleri Schulz, Ophyrs phrigra Fleischm. et Borm., Serapias vomeracea and Himantoglossum affine, which are growing commonly in the East Mediterranean Area, were cultured in vitro by using embryo culture. In order to culture salep embryos, 14 different media were used. The highest average germination rate and plant formation from protocorm were found as 2.39% and 1.86%, respectively on Van Waes Debergh + Tomato Ekstract + Active Carbon (VW&D + TE + AC) media. The …

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Forecasting Of The Long-Term Allowable Cut For The Akçasu Forestry Enterprise, Altay Uğur Gül Jan 1998

Forecasting Of The Long-Term Allowable Cut For The Akçasu Forestry Enterprise, Altay Uğur Gül

Turkish Journal of Agriculture and Forestry

The long-term allowable cut was ensured using data of Forest Menegement Plan of the Akçasu Forest enterprise. In addition, actuel forest state was approximated to an optimal forest state within different rotation age. Three forest management units were established. A linear programming model was developed on used to test three different strategies for the black pine and beech management unit and five different strategies for the oak management unit. For the first period, the regeneration, afforestation area, allowable cut and total cut was 210.0 and 341.0 hectar, 58546.0 m 3 and 1764516 m 3 , respectively.

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The Influence Of Phosphate Treatment On Chromosome Segregations And Tetrad Regularity And Using Tetrads In Determination Of Regular Meiosis Diploid ..., Bilal Deni̇z, Ayten Tufan Jan 1998

The Influence Of Phosphate Treatment On Chromosome Segregations And Tetrad Regularity And Using Tetrads In Determination Of Regular Meiosis Diploid ..., Bilal Deni̇z, Ayten Tufan

Turkish Journal of Agriculture and Forestry

This study was carried out under greenhouse conditions in 1994-1995. The influence of phosphate treatments (0, 1, 2, 3 and 4g P 2 O 5 /pot) on chromosome segregaiton at the first anaphase (AI) and tetrad regularity in plants of diploid Senu variety of meadow fescue ( Festuca pratensisHuds.) and its artificial autotetraploid were studied. In addition, the relationship was determined between balanced AI segregations and regular tetrads with respect to regular meiosis. AI segregations were often balanced in eutetraploids but the frequency of balanced groups was found to be lower than that of the diploids. The difference between diploid …

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New Names And Combinations In Encelia Frutescens Sensu Lato (Asteraceae: Heliantheae, Curtis Clark Jan 1998

New Names And Combinations In Encelia Frutescens Sensu Lato (Asteraceae: Heliantheae, Curtis Clark

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

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Cheilanthoid Ferns (Pteridaceae: Cheilanthoideae) In The Southwestern United States And Adjacent Mexico-A Molecular Phylogenetic Reassessment Of Generic Lines, Gerald J. Gastony, David R. Rollo Jan 1998

Cheilanthoid Ferns (Pteridaceae: Cheilanthoideae) In The Southwestern United States And Adjacent Mexico-A Molecular Phylogenetic Reassessment Of Generic Lines, Gerald J. Gastony, David R. Rollo

Aliso: A Journal of Systematic and Floristic Botany

Cheilanthoids are the most commonly encountered fern species of the arid southwest and other xeric habitats throughout the world. Cheilanthes, Notholaena, Pellaea, and Bommeria are the best known southwestern genera, but some authors recognize segregate genera such as Argyrochosma, Aspidotis, Astrolepis, and Pentagramma. Others reject distinctions among some of these genera as artificial, leaving cheilanthoid generic concepts in a state of flux. This unsettled taxonomy is often attributed to morphological homoplasy associated with adaptation to xeric habitats, suggesting the need for new analyses that do not depend on potentially misleading morphology. Nucleotide sequences …

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Ecophysiological Observations On Lane Mountain Milkvetch, Astragalus Jaegerianus (Fabaceae), A Proposed Endangered Species Of The Mojave Desert, Arthur C. Gibson, M. Rasoul Sharifi, Philip W. Rundel Jan 1998

Ecophysiological Observations On Lane Mountain Milkvetch, Astragalus Jaegerianus (Fabaceae), A Proposed Endangered Species Of The Mojave Desert, Arthur C. Gibson, M. Rasoul Sharifi, Philip W. Rundel

Aliso: A Journal of Systematic and Floristic Botany

Astragalus jaegerianus, the Lane Mountain milkvetch, a perennial herbaceous legume, is a rare and very narrow endemic of the central Mojave Desert in San Bernardino County, California, and currently proposed to be listed as an endangered species. This herb grows in the protection of low shrubs. Anatomical observations revealed that leaflets are amphistomatic and have isolateral mesophyll, typical of full-sun desert leaves, and the green stem is an important photosynthetic organ, having abundant stomata and a cylinder of cortical chlore nchyma. Ecophysiological studies showed that this species requires high PFD (1400-1500 μmol m-2s-1) to achieve …

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Introduction, Edward L. Schneider, Roy L. Taylor Jan 1998

Introduction, Edward L. Schneider, Roy L. Taylor

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

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Aliciella, A Recircumscribed Genus Of Polemoniaceae, J. Mark Porter Jan 1998

Aliciella, A Recircumscribed Genus Of Polemoniaceae, J. Mark Porter

Aliso: A Journal of Systematic and Floristic Botany

Recent phylogenetic analyses within Polemoniaceae have provided evidence that the current circumscriptionof Gilia recognizes and gives taxonomic status to a polyphyletic assemblage of species. As a first step in rectifying this problem, the genus Aliciella Brand (Polemoniaceae) is resurrected and recircumscribed to include Gilia section Giliandra and Gilia subgenus Gilmania sensu Mason & Grant, a monophyletic (=holophyletic) group as here described. Twenty-one recombinations are proposed: Aliciella cespitosa, A. formosa, A. haydenii, A. haydenii subsp. crandallii, A. heterostyla, A. humillima, A. hutchinsifolia, A. latifolia, A. latifolia subsp. imperialis. A. leptomeria. A. lottiae. A. mcvickerae.A. micromeria. A. nyensis, A. pentstemonoides, A. …

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Editorial Board & Iowa Academy Of Science Officers And Directors Jan 1998

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

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Iowa's Changing Forest Resources, Steven E. Jungst, Donald R. Farrar, Michael Brandrup Jan 1998

Iowa's Changing Forest Resources, Steven E. Jungst, Donald R. Farrar, Michael Brandrup

Journal of the Iowa Academy of Science: JIAS

After a period of decline in area extending from the 1850s to 1974, Iowa's forest area increased between 1974 and 1990. Although the area increase is encouraging, it may be fleeting. In addition, changes in forest stand structure and forest ownership patterns along with other pressures may make it difficult to maintain healthy forest ecosystems in the future. Notes from the original land survey in Iowa coupled with information from U.S. Forest Service forest inventories make it possible to look at changes in forest area and forest tree types. Unfortunately, similar long-term data do not exist to make possible a …

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Front Matter Jan 1998

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.

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Symposia Jan 1998

Symposia

Journal of the Minnesota Academy of Science

Abstracts from the Symposia Papers given at the 66th Annual Meeting for the Journal of the Minnesota Academy of Science.

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Winchell Papers Jan 1998

Winchell Papers

Journal of the Minnesota Academy of Science

Abstracts from the Winchell Papers given at the 66th Annual Meeting for the Journal of the Minnesota Academy of Science.

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Winchell Posters Jan 1998

Winchell Posters

Journal of the Minnesota Academy of Science

Abstracts from the Winchell Posters given at the 66th Annual Meeting for the Journal of the Minnesota Academy of Science.

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Regeneration - The Road Not Taken, Raymond E. Sicard Jan 1998

Regeneration - The Road Not Taken, Raymond E. Sicard

Journal of the Minnesota Academy of Science

Regeneration and repair are mutually-exclusive, adaptive responses to injury. The events associated with each process are well characterized. However, cellular and molecular mechanisms for their regulation are only now beginning to be defined. Moreover, full appreciation for factors that predispose to these contrasting pathways is not yet available. This article presents a perspective on regeneration and repair that suggests specific relationships between these modes of responding to injury. Injury provokes a coordinated pattern of response to tissue damage. At the wound site, local events determine whether tissue restoration or replacement occurs. Interplay among parenchymal and stromal cells at the site …

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