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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ http://repository.li...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ http://repository.li...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Ramos, Carlos; Sepúlveda, J.; Berbegall, Francisco; Romero, P.;

    La mejora del abonado nitrogenado permite ahorrar costes de abonado y reducir la contaminación de las aguas por nitrato.Un paso importante para un mejor abonado nitrogenado es la medida del contenido de nitrato en el suelo al inicio del cultivo. Sin embargo, a la mayoría de los agricultores el análisis de nitrato en el suelo no les compensa económicamente. El método que se propone podría resolver este problema porque es sencillo, rápido, económico y tiene una exactitud suficiente.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Recolector de Cienci...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Recolector de Cienci...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/

    When we analyze wave propagation, we should model the ground as if it is extended infinitely in the limited analytical region. Now we try to make infinite ground model by FEM and CIP method. CIP method is usually used to analyze sound, noise and electromagnetic field. In this research, we try to build both Incident field and Reflected field at the same time. When we can analyze both of field, it is able to chase the all the details of earthquake motion. 現在,地盤の非線形な動的挙動が活発に研究されている.非線形問題の解析には有限要素法が有効かつ柔軟な手法である.しかしながら,有限領域を対象とする手法であるため,無限あるいは半無限弾性体の波動伝播問題に適用する場合には,解析領域の内部と外部に境界を設け,外部から内部に伝わる入射波と内部から外部へ逸散する反射波の双方同時の処理が必要とされる.本研究ではCIP法を用い,より精度の高い境界処理法を目指す.本論では1次元棒材モデルを用いて提案と検討を行っている.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Stanišić Svetlana M.; Ignjatović Ljubiša M.; Anđelković Ivan; Stević Milica C.; +2 Authors

    The single agent extractions of major and trace metals from soil sample were conducted by means of rotary mixer and ultrasonic bath with sonication time of 10, 20, 30, 40 and 50 min. The sequential extraction according to the BCR scheme was undertaken. The obtained soil extracts were analyzed by ICP-OES and according to the results the rotary mixer assisted extraction was more efficient in the case of alkaline-earth elements. However, by the use of ultrasound several times higher amounts of matrix elements (Fe, Al and Mn) and heavy metals predominantly associated with Fe, Al and Mn oxyhydroxides were extracted. The increase of the sonication time failed to improve extraction yields. The changes of the conductivity, pH, oxidoreduction potential, particle size diameter and zeta potential of colloid particles, with the sonication time increase were measured. The extraction mechanism and expressed selectivity of ultrasound is discussed and explanation is suggested.

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    Authors: Özcan, Selçuk;

    Antepfıstığı, Gaziantep ilinde meyve üretimi bakımından ilk sırada yer almaktadır. Ancak, antepfıstığının üretimi sırasında karşılaşılan sorunlardan birisi de yabancı otlardır. Bu çalışma ile; Gaziantep ili ve çevresinde antepfıstığı bahçelerinde sorun olan yabancı ot türlerinin yaygınlık ve yoğunluklarının saptanması ve yabancı ot dağılımı üzerine etki eden ekolojik parametrelerin belirlenmesi hedeflenmiştir. Bu amaçla; araştırma alanını temsil edebilecek şekilde 70 antepfıstığı bahçesinde sürveyler gerçekleştirilmiştir. Gaziantep'te 11 monokotiledon, 37 dikotiledon olmak üzere 21 familyaya ait 48 yabancı ot türü saptanmıştır. Antepfıstığı bahçelerinde yapılan sürveylerde en fazla Poaceae (10 tür), Asteraceae (6 tür) ve Fabaceae (6 tür) familyalarına dahil türlere rastlanmıştır. Sorghum halepense (L.), Cynodon dactylon (L.) Pers., Avena fatua L., Heliotropium europaeum L., Lactuca serriola L., Chenopodium album Chorozophora tinctoria ve Tribulus terrestris en sık rastlanan ve yoğunluk oluşturan türler olarak belirlenmiştir. Örnekleme yapılan bahçe topraklarında yapılan analizlerde silt, Na, Ca (P?0,01) ve organik madde içerikleri (P?0,05) istatistiksel olarak önemli düzeyde farklılık göstermiştir. Örnekleme noktaları arasında silt %12, Na %12, Ca %9 ve organik madde ise %7 oranında bir varyasyon ortaya koymuştur. Ancak, yine istatistiksel olarak önemli bulunmayan toprak özelliklerinden kil varyasyonun %6'sını, K2O %5'ini, CaCO3 %5'ini ve pH %4'ünü açıklamaktadır. Buna rağmen, yabancı ot türlerinin dağılımını kesin hatlarla sınırlandıran toprak özellikleri saptanamamıştır. Dolayısıyla toprak özelliklerinin yabancı otların dağılımına olan etkileri sınırlı düzeyde kalmıştır.Anahtar Kelimeler: Antepfıstığı, Yabancı ot, Toprak özellikleri, Konikal Uyum Analizi (CCA) . Pistachio production is ranked the first among fruits grown in Gaziantep Province. Weeds are one of the major problems of pistachio production. The aims of this study were to define the prevalence and intensity of weed species and to determine ecological parameters explains the distribution of weeds in pistachio plantations. The study was carried out in 70 pistachio orchards representing the surveyed fields. In the province of Gaziantep, 48 weed species belonged to 21 families consisted of 11 monocotyledonous and 37 dicotyledonous were identified. The species identified in pistachio plantations were belonged to Poaceae (10 species), Astereceae (6 species) and Fabaceae (6 species) families. The most frequently and intensely encountered weed species in surveys were; Sorghum halepense (L.), Cynodon dactylon (L.) Pers., Avena fatua L., Heliotropium europaeum L., Lactuca serriola L., Chenopodium album, Chorozophora tinctoria and Tribulus terrestris. The silt, exchangeable Na, Ca and organic matter content of soils were significantly different among pistachio plantations. The variation of coefficients (CV) for soil attributes were 12% for silt content, 12% for Na, 9% for Ca and 7% for organic matter content, respectively. Although statistically non significant, clay content (CV=6%), K2O (CV=5%), CaCO3 (CV=5%) and pH (CV=4%) had slight variability among pistachio plantations. The results did not indicate a distinctive set of soil properties to identify the certain distribution of weed species in study area. Due to the low variability of soil properties among pistachio plantations, the effects of soil attributes determined on weed distribution were limited.Keywords: Pistachio, Weed, Soil Properties, Canonical Correspondence Analysis (CCA) 93

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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ YÖK Açık Bilim - CoH...arrow_drop_down
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    Authors: Martinović, Vilim;

    The availability of nitrogen in the soil is influenced by many different factors, and nitrogen supplementation is often performed "by heart" without analysis and detailed calculation of nitrogen doses. In this way, we can negatively affect the environment (excessive doses) or yield (lack of nitrogen). Therefore, the goal of this work is to determine the optimal dose of nitrogen for winter barley, which will be based on soil analysis and calculation of the dose with an advanced fertilization calculator. The N-min method and the N-min calculator were used to calculate the nitrogen dose. The average nitrate value in the analyzed soil samples was 3.34 mg/kg N-NO3- and 4.45 mg/kg N-NH4+. The calculated dose of nitrogen for a yield of 6.0 t/ha was 68 kg/ha N. The results of the Nmin method proved to be very useful and greatly helped to determine the amount of necessary nutrients that the plant lacked. Na raspoloživost dušika u tlu utječe mnogo različitih čimbenika, a prihrana dušikom često se izvodi „napamet“ bez analize i detaljnog izračuna doza dušika. Takvim načinom možemo negativno utjecati na okoliš (prekomjerne doze) ili prinos (nedostatak dušika). Zbog toga cilj ovog završnog rada je utvrditi optimalnu dozu dušika za prihranu ozimog ječma koja će se temeljiti na analizi tla i izračunu doze naprednim gnojidbenim kalkulatorom. Za izračun doze dušika primijenjena je N-min metoda i N-min kalkulator. Prosječna vrijednost nitrata u analiziranim uzorcima tla iznosila je 3,34 mg/kg N-NO3- i 4,45 mg/kg N-NH4+. Izračunata doza dušika za prinos od 6,0 t/ha iznosila je 68 kg/ha N. Rezultati N-min metode pokazali su se vrlo korisnim i uvelike su pomogli odrediti količinu potrebnih hranjiva koja su biljci nedostajala.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repository Faculty o...arrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repository Faculty o...arrow_drop_down
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    Authors: Gülyanar, Şayeste;

    Dipsacaceae üyesi taksonlarından Cephalaria amana Rech. fil. üzerinde 2009-2011 tarihleri arasında gerçekleştirlmiş bu otekolojik çalışma bitkini dağılım gösterdiği habitatların biyoklimatik, edafik, topoğrafik, biyotik gibi bazı özelliklerinin belirlenmesi ve bitki toprak ilişkilerini tespit etmek amacıyla yapılmıştır.Çalışma esnasında çeşitli analizler; Scheibler metodu, yaş yakma metodu, Kjeldahl metodu, Olsen metodu kullanılarak ve kalsimetre, spektrofotometre, Alev fotometresive ICP cihazları ile gerçekleştirilmiştir. Bulduğumuz sonuçlar mercek altına alınarak irdelenmiş ve yorum yapılmıştır. ayrıca endemik olan bu bitki populasyonunun korunması ve geliştirilmesi için öneriler sunulmuştur.2012, 67 sayfaAnahtar kelimeler:Otekolojik, endemik, bitki, toprak, Hatay This autoecological study was relaized between 2009-2011 on Cephalaria amana Rech. fil. that member the Dipsacaceae family and it aimed to find out bioclimatic, edaphic, topografic, biotic etc. characteristics of the habitats they distrubute. In addition, it aimed to explore the plant-soil relations of them.Various analysis were relaized by follwing the Scheibler method, Wet-Ashing method Kjeidal method, and Olsen method and by using the Calcimeter Spectrophotometer, Flamephotometer and ICP apparatus during study. All of the results obtained were considered and these resuts were commended. In addition some suggestions were brought for protection and development of this population.2012, 67 pagesKey words: Autoecological, endemic, plant, soil, Hatay 77

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    When we analyze wave propagation, we should model the ground as if it is extended infinitely in the limited analysis region. We can make the infinite ground model by CIP method. This method is usually used to analyze sound, noise and electromagnetic field. In this research, But, we use it to model the ground motion. We introduce polar coordinate system to get the theoretical solution more precisely. This solution is compared with the numerical results. In this paper we aim to investigate 2-dimensional radiation field by CIP method 現在,地盤の非線形性特性を考慮した動的研究が行われている.非線形特性を反映する方法として有限要素法による動的解析が挙げられるが,この方法では解析領域が限られる.このため,無限あるいは半無限弾性体の波動伝播問題に適用する場合には解析領域の内部から出てゆく放射波を完全に透過させる境界処理が必要である.この境界処理をより精度の高いものとするためCIP法を用いた.本研究では2次元格子モデルを用いた放射場モデルでCIP法の透過効果を検証する.

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Sommariva, E.;
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    Authors: Nascimento, Clístenes Williams Araújo do; Fontes, Renildes Lúcio Ferreira; Melicio, Adilson César Fortes Dias;

    The knowledge of the chemical forms of copper in soils and the relationships of these forms with soil copper availability are important for predicting the copper behavior in the soil-plant system. The present work studies the influence of liming on the available contents of copper as well as on the forms of copper fractions in six types of Oxisols. Soil samples, with and without liming, received copper at rates of 0.0, 20.0 and 40.0 mg dm-3 and remained incubated for 30 days. Then, available copper was extracted with Mehlich-1, Mehlich-3, DTPA and EDTA solutions, and analyzed by atomic absorption spectrophotometry. Additionally, soil samples were extracted in a sequential procedure to determine Cu in fractions of soil, as follows: exchangeable-Cu fraction, organic matter-Cu fraction, Mn oxide-Cu fraction, amorphous Fe oxide-Cu fraction, crystalline Fe oxide-Cu fraction, residual-Cu fraction, and the total Cu content in the soil. Soil samples to which Cu was added presented higher Cu retention in the organic matter fraction with a small percentage retained in the exchangeable-Cu fraction. Liming resulted in a decrease of Cu in the exchangeable and organic matter fractions and an increase in the Fe and Mn oxide fractions and in the residual fraction. Without liming, the organic matter fraction presented the highest contribution to Cu content found in the soil extracts obtained with all extractors, except EDTA. For treatments with liming, Cu contents in the organic matter fraction were better correlated to Cu contents in extracts obtained with DTPA and Mehlich-3. O conhecimento das formas químicas em que se encontra o cobre em solos, e suas relações com os teores disponíveis, são importantes para a previsão do seu comportamento no sistema solo-planta. Nesse sentido, este trabalho estuda a influência da calagem sobre os teores disponíveis e sobre o fracionamento de Cu em amostras de seis Latossolos. Essas amostras, submetidas ou não a calagem, receberam o elemento nas doses de 0,0, 20,0 e 40,0 mg dm-3 e foram incubadas por 30 dias. Terminada a incubação, procedeu-se a extração de Cu utilizando-se os extratores Mehlich-1, Mehlich-3, DTPA e EDTA. As amostras foram submetidas a um fracionamento que separou o Cu nas frações trocável, matéria orgânica, óxido de manganês, óxido de ferro amorfo, óxido de ferro cristalino e residual, além dos teores totais. Com sua aplicação ao solo o Cu foi retido, principalmente, na fração matéria orgânica, com pequena porcentagem retida na fração trocável. A calagem provocou redução nas frações trocável e matéria orgânica e aumento nas frações óxido de ferro, óxido de manganês e residual. Para os solos sem calagem, a fração matéria orgânica foi a que mais contribuiu para os teores determinados pelos extratores, com exceção do EDTA. Nos solos com calagem, o Cu ligado à matéria orgânica foi melhor correlacionado com os teores obtidos pelo DTPA e Mehlich-3.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Authors: Ramos, Carlos; Sepúlveda, J.; Berbegall, Francisco; Romero, P.;

    La mejora del abonado nitrogenado permite ahorrar costes de abonado y reducir la contaminación de las aguas por nitrato.Un paso importante para un mejor abonado nitrogenado es la medida del contenido de nitrato en el suelo al inicio del cultivo. Sin embargo, a la mayoría de los agricultores el análisis de nitrato en el suelo no les compensa económicamente. El método que se propone podría resolver este problema porque es sencillo, rápido, económico y tiene una exactitud suficiente.

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    When we analyze wave propagation, we should model the ground as if it is extended infinitely in the limited analytical region. Now we try to make infinite ground model by FEM and CIP method. CIP method is usually used to analyze sound, noise and electromagnetic field. In this research, we try to build both Incident field and Reflected field at the same time. When we can analyze both of field, it is able to chase the all the details of earthquake motion. 現在,地盤の非線形な動的挙動が活発に研究されている.非線形問題の解析には有限要素法が有効かつ柔軟な手法である.しかしながら,有限領域を対象とする手法であるため,無限あるいは半無限弾性体の波動伝播問題に適用する場合には,解析領域の内部と外部に境界を設け,外部から内部に伝わる入射波と内部から外部へ逸散する反射波の双方同時の処理が必要とされる.本研究ではCIP法を用い,より精度の高い境界処理法を目指す.本論では1次元棒材モデルを用いて提案と検討を行っている.

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    Authors: Stanišić Svetlana M.; Ignjatović Ljubiša M.; Anđelković Ivan; Stević Milica C.; +2 Authors

    The single agent extractions of major and trace metals from soil sample were conducted by means of rotary mixer and ultrasonic bath with sonication time of 10, 20, 30, 40 and 50 min. The sequential extraction according to the BCR scheme was undertaken. The obtained soil extracts were analyzed by ICP-OES and according to the results the rotary mixer assisted extraction was more efficient in the case of alkaline-earth elements. However, by the use of ultrasound several times higher amounts of matrix elements (Fe, Al and Mn) and heavy metals predominantly associated with Fe, Al and Mn oxyhydroxides were extracted. The increase of the sonication time failed to improve extraction yields. The changes of the conductivity, pH, oxidoreduction potential, particle size diameter and zeta potential of colloid particles, with the sonication time increase were measured. The extraction mechanism and expressed selectivity of ultrasound is discussed and explanation is suggested.

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    Authors: Özcan, Selçuk;

    Antepfıstığı, Gaziantep ilinde meyve üretimi bakımından ilk sırada yer almaktadır. Ancak, antepfıstığının üretimi sırasında karşılaşılan sorunlardan birisi de yabancı otlardır. Bu çalışma ile; Gaziantep ili ve çevresinde antepfıstığı bahçelerinde sorun olan yabancı ot türlerinin yaygınlık ve yoğunluklarının saptanması ve yabancı ot dağılımı üzerine etki eden ekolojik parametrelerin belirlenmesi hedeflenmiştir. Bu amaçla; araştırma alanını temsil edebilecek şekilde 70 antepfıstığı bahçesinde sürveyler gerçekleştirilmiştir. Gaziantep'te 11 monokotiledon, 37 dikotiledon olmak üzere 21 familyaya ait 48 yabancı ot türü saptanmıştır. Antepfıstığı bahçelerinde yapılan sürveylerde en fazla Poaceae (10 tür), Asteraceae (6 tür) ve Fabaceae (6 tür) familyalarına dahil türlere rastlanmıştır. Sorghum halepense (L.), Cynodon dactylon (L.) Pers., Avena fatua L., Heliotropium europaeum L., Lactuca serriola L., Chenopodium album Chorozophora tinctoria ve Tribulus terrestris en sık rastlanan ve yoğunluk oluşturan türler olarak belirlenmiştir. Örnekleme yapılan bahçe topraklarında yapılan analizlerde silt, Na, Ca (P?0,01) ve organik madde içerikleri (P?0,05) istatistiksel olarak önemli düzeyde farklılık göstermiştir. Örnekleme noktaları arasında silt %12, Na %12, Ca %9 ve organik madde ise %7 oranında bir varyasyon ortaya koymuştur. Ancak, yine istatistiksel olarak önemli bulunmayan toprak özelliklerinden kil varyasyonun %6'sını, K2O %5'ini, CaCO3 %5'ini ve pH %4'ünü açıklamaktadır. Buna rağmen, yabancı ot türlerinin dağılımını kesin hatlarla sınırlandıran toprak özellikleri saptanamamıştır. Dolayısıyla toprak özelliklerinin yabancı otların dağılımına olan etkileri sınırlı düzeyde kalmıştır.Anahtar Kelimeler: Antepfıstığı, Yabancı ot, Toprak özellikleri, Konikal Uyum Analizi (CCA) . Pistachio production is ranked the first among fruits grown in Gaziantep Province. Weeds are one of the major problems of pistachio production. The aims of this study were to define the prevalence and intensity of weed species and to determine ecological parameters explains the distribution of weeds in pistachio plantations. The study was carried out in 70 pistachio orchards representing the surveyed fields. In the province of Gaziantep, 48 weed species belonged to 21 families consisted of 11 monocotyledonous and 37 dicotyledonous were identified. The species identified in pistachio plantations were belonged to Poaceae (10 species), Astereceae (6 species) and Fabaceae (6 species) families. The most frequently and intensely encountered weed species in surveys were; Sorghum halepense (L.), Cynodon dactylon (L.) Pers., Avena fatua L., Heliotropium europaeum L., Lactuca serriola L., Chenopodium album, Chorozophora tinctoria and Tribulus terrestris. The silt, exchangeable Na, Ca and organic matter content of soils were significantly different among pistachio plantations. The variation of coefficients (CV) for soil attributes were 12% for silt content, 12% for Na, 9% for Ca and 7% for organic matter content, respectively. Although statistically non significant, clay content (CV=6%), K2O (CV=5%), CaCO3 (CV=5%) and pH (CV=4%) had slight variability among pistachio plantations. The results did not indicate a distinctive set of soil properties to identify the certain distribution of weed species in study area. Due to the low variability of soil properties among pistachio plantations, the effects of soil attributes determined on weed distribution were limited.Keywords: Pistachio, Weed, Soil Properties, Canonical Correspondence Analysis (CCA) 93

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    Authors: Martinović, Vilim;

    The availability of nitrogen in the soil is influenced by many different factors, and nitrogen supplementation is often performed "by heart" without analysis and detailed calculation of nitrogen doses. In this way, we can negatively affect the environment (excessive doses) or yield (lack of nitrogen). Therefore, the goal of this work is to determine the optimal dose of nitrogen for winter barley, which will be based on soil analysis and calculation of the dose with an advanced fertilization calculator. The N-min method and the N-min calculator were used to calculate the nitrogen dose. The average nitrate value in the analyzed soil samples was 3.34 mg/kg N-NO3- and 4.45 mg/kg N-NH4+. The calculated dose of nitrogen for a yield of 6.0 t/ha was 68 kg/ha N. The results of the Nmin method proved to be very useful and greatly helped to determine the amount of necessary nutrients that the plant lacked. Na raspoloživost dušika u tlu utječe mnogo različitih čimbenika, a prihrana dušikom često se izvodi „napamet“ bez analize i detaljnog izračuna doza dušika. Takvim načinom možemo negativno utjecati na okoliš (prekomjerne doze) ili prinos (nedostatak dušika). Zbog toga cilj ovog završnog rada je utvrditi optimalnu dozu dušika za prihranu ozimog ječma koja će se temeljiti na analizi tla i izračunu doze naprednim gnojidbenim kalkulatorom. Za izračun doze dušika primijenjena je N-min metoda i N-min kalkulator. Prosječna vrijednost nitrata u analiziranim uzorcima tla iznosila je 3,34 mg/kg N-NO3- i 4,45 mg/kg N-NH4+. Izračunata doza dušika za prinos od 6,0 t/ha iznosila je 68 kg/ha N. Rezultati N-min metode pokazali su se vrlo korisnim i uvelike su pomogli odrediti količinu potrebnih hranjiva koja su biljci nedostajala.

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    Authors: Gülyanar, Şayeste;

    Dipsacaceae üyesi taksonlarından Cephalaria amana Rech. fil. üzerinde 2009-2011 tarihleri arasında gerçekleştirlmiş bu otekolojik çalışma bitkini dağılım gösterdiği habitatların biyoklimatik, edafik, topoğrafik, biyotik gibi bazı özelliklerinin belirlenmesi ve bitki toprak ilişkilerini tespit etmek amacıyla yapılmıştır.Çalışma esnasında çeşitli analizler; Scheibler metodu, yaş yakma metodu, Kjeldahl metodu, Olsen metodu kullanılarak ve kalsimetre, spektrofotometre, Alev fotometresive ICP cihazları ile gerçekleştirilmiştir. Bulduğumuz sonuçlar mercek altına alınarak irdelenmiş ve yorum yapılmıştır. ayrıca endemik olan bu bitki populasyonunun korunması ve geliştirilmesi için öneriler sunulmuştur.2012, 67 sayfaAnahtar kelimeler:Otekolojik, endemik, bitki, toprak, Hatay This autoecological study was relaized between 2009-2011 on Cephalaria amana Rech. fil. that member the Dipsacaceae family and it aimed to find out bioclimatic, edaphic, topografic, biotic etc. characteristics of the habitats they distrubute. In addition, it aimed to explore the plant-soil relations of them.Various analysis were relaized by follwing the Scheibler method, Wet-Ashing method Kjeidal method, and Olsen method and by using the Calcimeter Spectrophotometer, Flamephotometer and ICP apparatus during study. All of the results obtained were considered and these resuts were commended. In addition some suggestions were brought for protection and development of this population.2012, 67 pagesKey words: Autoecological, endemic, plant, soil, Hatay 77

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    When we analyze wave propagation, we should model the ground as if it is extended infinitely in the limited analysis region. We can make the infinite ground model by CIP method. This method is usually used to analyze sound, noise and electromagnetic field. In this research, But, we use it to model the ground motion. We introduce polar coordinate system to get the theoretical solution more precisely. This solution is compared with the numerical results. In this paper we aim to investigate 2-dimensional radiation field by CIP method 現在,地盤の非線形性特性を考慮した動的研究が行われている.非線形特性を反映する方法として有限要素法による動的解析が挙げられるが,この方法では解析領域が限られる.このため,無限あるいは半無限弾性体の波動伝播問題に適用する場合には解析領域の内部から出てゆく放射波を完全に透過させる境界処理が必要である.この境界処理をより精度の高いものとするためCIP法を用いた.本研究では2次元格子モデルを用いた放射場モデルでCIP法の透過効果を検証する.

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    Authors: Sommariva, E.;
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