Agriculture Commons^™

Identification And Characterization Of Hydrolytic Enzymes From The Midgut Of The Cotton Bollworm, Helicoverpa Armigera Hübner (Lepidoptera: Noctuidae), Ebru Özgür, Meral Yücel, Hüseyi̇n Avni̇ Öktem

Turkish Journal of Agriculture and Forestry

Midgut hydrolytic enzymes of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) were identified and partially characterized. K_m, V_{max}, optimum pH, and specific activity were determined for proteolytic enzymes and \alpha-amylases. All hydrolytic enzyme activity had an optimum pH value in the alkaline pH range. We observed major serine protease activity, together with minor cysteine-like activity, the former being significantly inhibited by soybean trypsin inhibitor (SBTI) and aprotinin. Moreover, different degrees of inhibition were observed with synthetic protease inhibitors. Electrophoretic methods revealed 3 isozymes of \alpha-amylases, of which 2 had higher molecular weight and were more active than the other. Inhibition of amylolytic …

Determination Of Soil Loss By ^{137}Cs Fallout Radionuclide In Ömerli Watershed Of İstanbul, Turkey, Muhammet Sahi̇p Kiziltaş, Sevi̇lay Haciyakupoğlu, Ferhat Gökbulak, Ahmet Hizal

Turkish Journal of Agriculture and Forestry

Soil erosion and sedimentation in watersheds are usually part of the information to be considered for soil and water conservation measures. Soil loss is generally estimated with models or measured with plot studies. Although fallout radionuclides (FRN) methodology provides a powerful technique for predicting the impacts of proposed land management strategies on soil erosion and sediment yield within river basins and estimates erosion based on fallout radioisotopes (Cs-137, Pb-210, Be-7) radioactivity, it is rarely used in Turkey. The aim of this study was to determine soil losses from different land use types with FRN's methodology by using caesium-137 radionuclide in …

The Use Of Aridity Index To Assess Implications Of Climatic Change For Land Cover In Turkey, Derya Önder, Mehmet Aydin, Süha Berberoğlu, Sermet Önder, Tomohisa Yano

Turkish Journal of Agriculture and Forestry

This study was carried out to determine the impacts of climate change on aridity and land cover in Turkey. Data for future (2070s) climate change, according to present conditions (1990s), were estimated from the prediction results of a regional climate model (RCM). The RCM, which was developed in Japan, is based on the MRI model. The potential impacts of climate change were estimated according to the A2 scenario of Special Report on Emissions Scenarios (SRES). Aridity index, the ratio of precipitation to potential evapotranspiration, was computed by using measured data for the present condition and estimated data by the RCM …

Long-Term Effects Of Crop Rotation And Fertilizers On Weed Community In Spring Barley, H. R. Mohammaddoust Chamanabad, A. Ghorbani, Ali Asghari, A. M. Tulikov, F. Zargarzadeh

Turkish Journal of Agriculture and Forestry

Integrated weed management programs require a clear understanding of the mechanisms influencing the establishment, growth, and reproduction of unwanted plants (weeds) in agro-ecosystems. This study evaluates the effect of long-term (95 years after the establishment of the site) crop rotation and chemical fertilizers on the weed community dynamics in spring barley at the Agricultural University of Timiriazev, Agricultural Site in Moscow. The weed community occurring on plots of spring barley (grown in crop rotation or continuous) was examined under nitrogen, potassium, phosphorus, NPK, and a control with no fertilizer treatments. Statistical analyses were conducted using analysis of variance (ANOVA) and …

Weed Vegetation Of Small Grain Crops In Serbia: Environmental And Human Impacts, Sava Vrbnicanin, Zora Dajic Stevanovic, Katarina Jovanovic Radovanov, Ahmet Uludağ

Turkish Journal of Agriculture and Forestry

Weed flora of winter and spring small grain crops (wheat, barley, oats, and rye) was surveyed in lowland and mountainous areas of the central part of Serbia, which are dissimilar in environmental conditions, primarily climate and soil characteristics, and crop management practices. The weed community of the mountainous area was more diverse that of the lowlands. The weed community of the mountainous area was characterized by a significantly higher proportion of dicotyledonous species, mainly hemicryptophytes, probably due to insufficient tillage and the consequent impact of surrounding grassland vegetation. Different environmental conditions and crop managements of the 2 sites caused the …

Green And Roasted Mate: Phenolic Profile And Antioxidant Activity, Ni̇hal Türkmen Erol, Ferda Sari, Eda Çalikoğlu, Y. Sedat Veli̇oğlu

Turkish Journal of Agriculture and Forestry

Mate infusions have been recently and frequently used as dietary supplements because of their health effects to prevent atherosclerosis and coronary heart disease and to be antioxidant. The aim of this study was to determine phenolic compounds and antioxidant activities of green mate (GM) and roasted mate (RM) extracts and compare them with green tea (GT). Total polyphenol content of GM and RM extracts was found to be similar and to range from 237.20 to 438.50 mg gallic acid equivalent (GAE) g^{-1} dry extract and from 256.72 to 473.11 mg GAE g^{-1} dry extract depending on the solvent used and …

Microbial Biomass And Enzyme Activity In Vineyard Soils Under Organic And Conventional Farming Systems, Nur Okur, Ahmet Altindi̇şli̇, Muzaffer Çengel, Selçuk Göçmez, Hüseyi̇n Hüsnü Kayikçioğlu

Turkish Journal of Agriculture and Forestry

Many recent studies from around the world have compared organic and conventional farming systems in terms of soil properties. Microbial biomass and enzyme activity were compared in vineyard soils managed by organic and conventional practices under Mediterranean conditions during the growing. Organic treatments were (i) green manure and farmyard manure at the rate of 30 t ha^{-1} (GM1), (ii) green manure and farmyard manure at the rate of 10 t ha^{-1}, plus E2001 EM Bio-polymer gel solution (GM2), and (iii) green manure plus E2001 EM Bio-polymer gel solution (GM3). Only mineral fertilizers and pesticides were used in the conventional system …

The Impact Of Seeding Rate And Inter-Row Spacing On Italian Ryegrass For Seed In The First Harvest Year, Aleksandar Simic, Savo Vuckovic, Radojka Maletic, Dejan Sokolovic, Nenad Djordjevic

Turkish Journal of Agriculture and Forestry

Italian ryegrass (Lolium multiflorum Lam.) cv. Tetraflorum sown with different inter-row spacings and seeding rates was grown under the agroecological conditions of Western Serbia. Field experiments were carried out between 2002 and 2006, and biometric characteristics-generative tillers, seed yield, and shoot dry mass-were measured during the first production year. Italian ryegrass was grown with 3 row spacings (20, 40, and 60 cm), using 4 seeding rates (5, 10, 15, and 20 kg ha^{-1}). Tiller length was affected by stand density, while 2 other tiller parameters were affected considerably less by the treatments applied. The influence of tiller characteristics on yield …

The Physico-Chemical And Microbiological Properties Of Wheat Flour In Thrace, Ali̇ Aydin, Peter Paulsen, Frans Johannes M. Smulders

Turkish Journal of Agriculture and Forestry

The physico-chemical and microbiological properties of wheat flour samples (type 650) obtained from 7 different locations in the Thrace region (Turkey) were assessed. Totally 142 wheat flour samples were analysed physico-chemically in terms of ash, moisture, fat acidity, and protein amounts, and microbiologically in terms of total mesophilic aerobic bacteria (TMAB), Escherichia coli, Bacillus cereus, Clostridium perfringens, moulds, rope-spore counts, and Salmonella spp. In the physico-chemical parameters investigated, only the ash levels of flour samples were higher than the limit laid down in the Turkish Food Codex and Codex Alimentarius. In some locations, the levels of TMAB, E. coli, and …

The Relationship Between The Form Of Dead Bark And Lignin Content In Scots Pine (Pinus Sylvestris L.), Tomasz Jelonek, Witold Pazdrowski, Magdalena Arasimowicz-Jelonek, Jaroslaw Gzyl, Arkadiusz Tomczak, Jolanta Floryszak-Wieczorek

Turkish Journal of Agriculture and Forestry

In this study the proportion of lignin in wood tissue was analysed in 36 Scots pines differing in their form of dead bark. Material for analyses came from pure pine stands aged 89-91 years located in northern Poland. Chemical analyses were performed in the mature wood zone comprising the last 10 diameter increments located at a height of 1.3 m (DBH). Results indicate differences in lignin content and growth rate in pines whose stems were characterized by different forms of dead bark. The study showed significant differences in lignin contents between trees with shell and scaly dead bark and trees …

Effect Of Superparasitism On The Development Of The Solitary Parasitoid Chelonus Oculator Panzer (Hymenoptera: Braconidae), Hi̇lal Tunca, Neşet Kilinçer

Turkish Journal of Agriculture and Forestry

The egg-larval parasitoid Chelonus oculator Panzer (Hymenoptera: Braconidae) is a solitary endoparasitoid. The effect of superparasitism on the development of C. oculator was investigated on a host, Cadra cautella Walker (Lepidoptera : Pyralidae) at 25 °C, 60%-70% R.H., and 16:8 h (L:D) photoperiod. The development time of C. oculator from egg to adult was related to parasitism level from 42.5 ± 0.19 days under single parasitism to 48.4 ± 0.57 days under triple parasitism. The emergence rate of the parasitoid decreased as the parasitism level increased. In addition, the dry mass of adult parasitoid was significantly affected by the superparasitism. …

Putative Agents Of Fig Mosaic Disease In Turkey, Kadri̇ye Çağlayan, Vicente Medina, Mona Gazel, Çi̇ğdem U. Serçe, Luis Serrano, Angeles Achon, Soner Soylu, Oğuzhan Çalişkan, Mustafa Gümüş

Turkish Journal of Agriculture and Forestry

Leaves from 58 fig tree accessions showing different severity of mosaic and necrotic symptoms were collected in 2 different regions of Turkey and analysed by transmission electron microscope (TEM) and RT-PCR to determine putative causal agents of fig mosaic disease (FMD). Ultrastructural studies showed that double membrane-bound bodies (DMBs) were mainly observed in the parenchyma and mesophyll cells of infected leaves of the cultivars Göklop and Morgüz and some seedlings showing only mosaic symptoms. These bodies were surrounded by a fibrillar matrix in most of the infected cells. Long, flexuous rod-shaped virus-like particles (LFPs) were also observed in vascular tissues …

Blast Disease Influence On Agronomic And Quality Traits Of Rice Varieties Under Mediterranean Conditions, Spyridon D. Koutroubas, Dimitrios Katsantonis, Dimitrios A. Ntanos, Elizabetta Lupotto

Turkish Journal of Agriculture and Forestry

The effects of Pyricularia oryzae, the causal agent of blast disease in rice, on plant growth, grain yield, and grain quality under Mediterranean conditions were studied in 2002 and 2003. Four rice varieties were grown under high and low disease pressure, achieved by early inoculation with the blast fungus and by natural infection, respectively. Results showed that inoculation affected the overall plant growth and yield and resulted in a reduction in plant height, number of productive tillers per plant, grain weight, and grain yield. The magnitude of the reduction was dependent on the varietals' susceptibility to the disease. Both types …

Effects Of Potassium, Magnesium, And Sulphur Containing Fertilizers On Yield And Quality Of Sugar Beets (Beta Vulgaris L.), Mehmet Zengi̇n, Fatma Gökmen, M. Ati̇lla Yazici, Sai̇t Gezgi̇n

Turkish Journal of Agriculture and Forestry

Effects of potassium (K), magnesium (Mg), and sulphur (S) containing fertilizers on root yield, refined sugar yield, and K, Mg, and S concentrations of leaf of sugar beet (Beta vulgaris L.) were studied on 3 different locations in Konya province, namely Kuzucu, Karaarslan, and Alakova, in 2004, 2005, and 2006. In the trails, a uniform diammonium phosphate (DAP) + urea application was used as the control treatment, while potassium sulphate and Mg containing Kalimagnesia, were applied at varying rate combinations. Compared to the control treatment (DAP + urea), all fertilizer treatments containing K, Mg, and S increased root yield in …

Physiological And Nutritional Responses Of Chickpea (Cicer Arietinum L) To Salinity, Abdelmajid Krouma

Turkish Journal of Agriculture and Forestry

The aim of this study was to evaluate growth, nodulation, nitrogen fixation, and ionic repartition in 2 chickpea varieties, namely Chetoui and Amdoun, which are grown under salt stress. Inoculated seedlings were grown in a nutrient solution that lacked NaCl (control) or supplemented with 25 or 50 mM NaCl. Whole plant and nodule growth, nitrogen fixation and sodium, and chloride and potassium partitioning were subsequently evaluated. In comparison to Chetoui, Amdoun maintained a high level of whole plant and nodule growth and had a greater nitrogen fixation activity. Nitrogenase activity measurements demonstrated that nodule senescence was more precocious in Chetoui …

Screening Of Wild Emmer Wheat Accessions (Triticum Turgidum Subsp. Dicoccoides) For Mycorrhizal Dependency, Cemal Yücel, Hakan Özkan, İbrahi̇m Ortaş, Tacetti̇n Yağbasanlar

Turkish Journal of Agriculture and Forestry

Mycorrhizal dependency was studied in 23 wild emmer (Triticum turgidum subsp. dicoccoides) accessions originating from ecologically and geographically different locations in the Fertile Crescent covering Israel, Turkey, Lebanon, Jordan, and Syria. Wild emmer accessions were grown with mycorrhizae (Glomus mosseae) and non-mycorrhizae under greenhouse conditions, and harvested according to the Zadoks scale at growth stage 33. Root, shoot and total dry weight, growth response, root infection, and mycorrhizal dependency were calculated. It was determined that mycorrhizal inoculation increased 4.1-, 3.9-, and 3.9-fold for root, shoot, and total dry weight, respectively, compared to the control. It was found that wild emmer …

Variability In Wheat Yield Under Yellow Rust Pressure In Pakistan, Sajid Ali, Syed Jawad Ahmed Shah, Hidayat-Ur Rahman, Muhammad Shahab Saqib, Muhammad Ibrahim, Muhammad Sajjad

Turkish Journal of Agriculture and Forestry

Wheat yield of 37 wheat varieties along with a susceptible check, Morocco, was studied under yellow rust pressure across 3 locations of North West Frontier Province (NWFP), Pakistan during 2007. Considerable high disease pressure, as revealed by yellow rust severity, was observed at all locations with the maximum (100%) at Cereal Crop Research Institute (CCRI), Nowshera. Disease severity ranged from 0% to 70% for the tested varieties while reached 100% for Morocco with S type of host response. We report the presence of sufficient variability across locations for both yield potential and yellow rust severity. Locations with maximum disease pressure …

Variation In Resistance To Marine Borers In Commercial Timbers From Turkey, As Assessed By Marine Trial And Laboratory Screening, Hüseyi̇n Si̇vri̇kaya, Simon M. Cragg, Luisa M. S. Borges

Turkish Journal of Agriculture and Forestry

Commercial timbers from Turkey used in coastal construction and boat building were tested for their resistance to marine wood-boring invertebrates in a marine trial and in a laboratory screening test. The timbers tested were beech (Fagus orientalis Lipsky), oak (Quercus petraea (Mattuschka) Liebl.), chestnut (Castanea sativa Mill.), and Scots pine (Pinus sylvestris L.). The marine trial was conducted over a period of 5 months at Mersin on the southern Mediterranean coast of Turkey. Activity by teredinid (Mollusca, Bivalvia) borers during this period was very high, resulting in the maximum rating of 4 on the EN 275 scale for P. sylvestris …

Detection Of Some Woody Plants In Late Oligocene Forests Of İstanbul, Nurgül Karlioğlu, Ünal Akkemi̇k, Hülya Caner

Turkish Journal of Agriculture and Forestry

A paleopalynological study was performed on the fossilized pollen found in the coal and clay layers of the Akçelik Coalmine, which is one of the open lignite quarries located at the northern part of İstanbul, and 15 genera belonging to 14 families were identified from the late Oligocene of İstanbul. Of these 14 families, 4 families belong to Gymnospermae, and 10 of them belong to Angiospermae. In the study, 85.8% of pollen is arboreal (AP) (woody plants), 10.4% is non-arboreal (NAP) (herbal plants), and rest of them (3.8%) could not be identified. The middle coal layer has a significant number …

Weed Control In Maize (Zea Mays L.) With Effective Minimum Rates Of Foramsulfuron, Kami̇l Kir, M. Nedi̇m Doğan

Turkish Journal of Agriculture and Forestry

Dose-response experiments were conducted under controlled conditions to determine the effective minimum rates (ED_{90}) of foramsulfuron for 11 weed species that occur in maize growing areas in Turkey. Annual weeds were collected from maize fields in the cotyledon stage and transferred to pots containing a mixture of soil-turf (1:1 ratio). Perennial weeds were grown from rhizome pieces collected from infested fields. Weeds were then treated with different rates of foramsulfuron to determine the effective minimum rate (ED_{90}) for each weed species via dose-response experiments. Results showed that ED_{90} rates were lower than the recommended herbicide rate for most weed species. …

Determination Of Pathogenic Variability Of Didymella Rabiei, The Agent Of Ascochyta Blight Of Chickpea In Turkey, Muharrem Türkkan, F. Sara Dolar

Turkish Journal of Agriculture and Forestry

Pathogenic characterization of 64 Didymella rabiei isolates obtained from 5 different regions in Turkey was determined with a set of 7 different chickpea cultivars (ILC 1929, F8, ICC 1903, ILC 249, ILC 482, ILC 3279, and ICC 3996). All the isolates were classified into both 3 pathotypes and 6 physiological races. Of the isolates used in this study, it was determined that 38 (59.4%) belonged to pathotype I, 3 (4.7%) to pathotype II, and 23 (35.9%) to pathotype III. Pathotypes I and III were determined in 5 regions of Turkey including the Mediterranean, Aegean, Southeastern Anatolia, Central Anatolia, and Black …

Genetic Variability And Interrelationship Among Grain Yield And Some Quality Traits In Turkish Winter Durum Wheat Landraces, Mevlüt Akçura

Turkish Journal of Agriculture and Forestry

Twenty durum wheat pure lines obtained from landraces collected from southwestern districts of Konya and 5 durum wheat cultivars were evaluated under rain fed conditions in Konya between 2005 and 2008 in a 3 replicates randomized complete block design to estimate genetic variation and heritability for grain yield and 6 quality traits. The overall goal of the study was to improve pure lines from durum wheat landraces for low input agricultural areas of the Central Anatolian region and similar environmental conditions. The broad sense heritability estimates ranged from 12.9% (particle size index) to 50.0% (semolina color). The highest expected genetic …

Geology And Wine In Missouri: Spatial Analysis Of Terroir Using A Geographic Information System And Remote Sensing, Kathryn Nora Barnard

Graduate Theses/Dissertations

The concept of terroir, based on the French word meaning 'sense of place,' suggests that flavor and quality of wine is associated with certain physical characteristics of the earth as well as viticulture and viniculture practices. The physical characteristics of terroir include soil, geology, topography, and climate. Designated American Viticultural Areas (AVAs) are discrete appellations in the United States that have well-established and historic viticultural practices, but the relationship between terroir and AVA appellations is complex. Wineries are a growing industry in the United States and the use of a GIS and remote sensing has proved useful in many other …

Land Resources Series No 21 - Tambellup-Borden Area Land Resources Survey, Angela Stuart-Street, Rohan Marold

Natural resources published reports

AGDEX 526

Land Resources Series No. 21

This report presents results from soil-landscape mapping at a scale of 1: 100,000 in the Tambellup- Borden area of Western Australia. It is accompanied by a soil-landscape map covering almost 511,000 hectares.

Most of the survey occurs within the upper Frankland-Gordon, Kent, North Stirlings Basin and upper reaches of the Pallinup and Kalgan River catchments. The survey falls within the Katanning and Albany Department of Agriculture and Food advisory districts.

Seventeen soil-landscape systems have been identified and are represented on the map on the accompanying CD-ROM. These systems have been further divided into …

Symbiotic Effects Of The Fungus Glomus Sp. On Chromium(Iii), Chromium(Vi), And Lead(Ii) Uptake By Mesquite (Prosopis Sp.): A Novel Method To Remediate Heavy Metals, Jack A. Arias

Open Access Theses & Dissertations

The indiscriminate disposal of lead (Pb) and chromium (Cr) containing wastes has resulted in a detrimental impact on environmental health. Lead and Cr are in the EPA priority list due to their degree of toxicity on humans, animals, plants, and other living organisms. The removal of toxic wastes involves technologies that are expensive, sometimes incomplete, and could represent health hazards. In addition, site restoration after contaminant removal encompasses time and technological resources. Phytoremediation, the use of plants alone or associated with microorganisms, represents a potentially cost-effective option in the long term management of contaminated sites. Various plants known as "hyperaccumulators" …

Landscapes And Soils Of The Merredin District, D N. Sawkins, Department Of Agriculture And Food

Bulletins 4000 -

The publication aims to provide readers with the principles underlying the formation of local landscapes and soils, and the ability to identify landscapes and their associated soils.

An Analysis Of The Impact Of The Eu Sugar Policy Reform On Acp Countries: A Quota Market Framework, Liliane Kiswendsida Zoungrana

LSU Doctoral Dissertations

The pressures for reform within the World Trade Organization have led to the European Union (EU) reforming its sugar policy with a price cut phased from 2006 and scheduled to end in 2009. The reform will have an impact on the sugar protocol African Caribbean and Pacific (ACP) countries that have a preferential market access to the European Union with a protected price. This study investigates the effect of EU sugar policy reform has on these ACP sugar countries. First, it examines how the protocol countries’ sugar supply and demand determinants. While the determinants of supply in some countries performed …

Three Essays On The World Rice Market: A Structure, Conduct, And Performance Paradigm Approach, Hyunsoo Kang

LSU Doctoral Dissertations

In the past several decades, the international rice market has undergone major changes experiencing a strong expansion in traded volumes and in the volatility of rice prices. International rice prices are, furthermore, expected to remain at relatively high levels because of higher fertilizer and fuel prices, especially as stocks held by those exporters still allow unrestrained sales. With this instability in the world rice market, we need to consider the structure, conduct, and performance (S-C-P) of the world rice market. The main objective of this dissertation will be to examine the world rice market based on S-C-P methods. This dissertation …

Three Essays On Environmental Issues Associated With Broiler Production In Louisiana, Nirmala Adhikari Devkota

LSU Doctoral Dissertations

The increasing trends of integrated and concentrated broiler production results in a serious threat to environment through excessive litter production and lack of its proper disposal. Production concentration in limited area is a major source of surface as well as ground water pollution. Nonpoint source pollution from broiler litter applied on land remains a major concern in Louisiana and elsewhere in Southeastern USA. This study examines alternative approaches to reduce pollution originating from broiler production. First, I evaluate why some producers adopt BMP faster than others and what kind of factors affect the time to adoption decision. The duration model …

Biophysical Economic Analysis Of Nutrient And Sediment Management Practices In The Mississippi Alluvial Valley, Augustus Nyako Matekole

LSU Doctoral Dissertations

Conventional drainage systems and poorly drained soils tend to increase row crop agriculture nutrient and sediment effluent loads. Best management practices help reduce row crop production environmental pollution. This dissertation looked at nutrient and tillage management practices that could help farmers address future total maximum daily loads (TMDLs) for the Cabin-Teele sub-watershed, within the lower Mississippi River Basin. The dissertation had two objectives. The first objective was to examine the economic and environmental impact of tillage and nutrient management practices in reducing agricultural pollutants to meet TMDL requirements. Relative cost effectiveness of different tillage and nutrient management practices were analyzed …