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Öğe Assessment of pollution in agricultural fields around corlu dumpsite through gis(Parlar Scientific Publications (P S P), 2020) Yüksel, Orhan; Sarı, HüseyinThis study aims to reveal the effects of hazardous waste storage sites on environment over the analyses performed on soils and plants. To this end, the hazardous waste storage site (dump site) in Corlu town of Tekirdag province, which has the largest area and volume in the region, was chosen as the study area. Corlu is among the important industrial centers of the region (Thrace). In addition, present dump site collects the waste of surrounding districts, especially the industrially developed districts such as Cerkezkoy. Therefore, it may be expected that the dump site had excessive quantities of polluted materials and thus exerted greater threats of pollution on environment. Moreover, the preliminary surveys carried out indicated that existence of agricultural fields around the dumpsite led this area to be selected as the study area. In this sense, heavy metal, macro and micro element analyses were performed on 66 soil samples taken from 22 different points and on 14 plant samples taken from the points where agricultural activities (wheat farming) were practiced. Present findings were not able to reveal any significant correlations between the distance from the dump site and soil-plant heavy metal contents. However, there were significant positive correlations between the heavy metal and clay contents of the sampling sites. It can be stated that sloping nature of the research site reduced heavy metal concentrations of seepage water through the soil profile. It was believed that Corlu stream located at the furthest position to dump site at the end of slope served as a drainage canal for the sampling sites and heavy metals leached through soil profile by precipitations drained into Corlu stream.Öğe Çöp kompostunun farklı tekstüre sahip toprakların agregat stabilitesine etkisi(2023) Atav, Volkan; Yüksel, OrhanSürdürülebilir tarım uygulamaları toprakların fiziksel özelliklerinin korunmasını ve iyileştirilmesini gerektirmektedir. Bu çerçevede belediye katı atıklarından elde edilen çöp kompostları, birçok ülkede organik toprak düzenleyici olarak tarım alanlarında kullanılmaktadır. Araştırma kapsamında; farklı tekstüre sahip topraklarda çöp kompostunun, toprakların agregat stabilitesi özellikleri üzerine etkisi incelenmiştir. Araştırma, 3 tekerrürlü saksı denemesi kurularak yürütülmüştür. Çöp kompostu, kuru ağırlık üzerinden 0, 5, 10, 15 t da-1 oranlarında saksılara uygulanmıştır. Araştırma sonuçlarına göre; kompost uygulamaları agregat stabilitesi değerlerini, her üç toprak tipinde de önemli ölçüde arttırmıştır. Özellikle yüksek dozlarda toprakların agregat stabilitesi değerleri daha belirgin bir artış göstermiştir. Kompost uygulaması en yüksek etkiyi, kaba bünyeli yapısı nedeniyle kumlu kil tın tekstüre sahip olan toprakta göstermiştir. Çalışmada, çöp kompostu uygulamalarının, toprakta agregasyonu düzenleyici ve stabilizasyonu artırıcı etkileri gözlemlenmiştir. Bu bulgular, çöp kompostunun farklı tekstüre sahip topraklarda agregasyon üzerine etkisinin olumlu olduğunu ancak etkisinin tekstüre bağlı olarak farklılık gösterdiğini ortaya koymuştur.Öğe Effects of vermicompost on aggregate stability, bulk density and some chemical characteristics of soils with different textures(Namik Kemal University - Agricultural Faculty, 2020) Aktaş, Tezcan; Yüksel, OrhanThis study was conducted to investigate the effects of vermicompost treatments on some physical and chemical characteristics of two soils with different textures. Experiment was conducted in 30 pots with 2 soil types, 5 vermicompost doses (0, 20, 40, 80, 160 t ha-1) and 3 replications. Vermicompost doses calculated over dry weights were applied to 5 kg pots and soil-vermicompost mixtures were incubated under laboratory conditions for about 90 days. According to analysis results, vermicompost treatments significantly increased organic matter content, pH, EC and cation exchange capacity (CEC) values of both soil types. Vermicompost applied at different doses increased organic matter and salt contents of both soil types parallel to increasing doses. As compared to the control dose, soil salinity greatly increased with the greatest vermicompost dose (16 t da-1). Soil pH values increased in acidic loamy soils and decreased in clay soils with relatively high pH values. Since vermicompost has high organic matter content, it increased soil CEC values significantly. It was found that there were significant positive correlations between organic matter content and CEC values of the soils. Vermicompost treatments had positive effects also on soil physical characteristics, increased aggregate stability and decreased bulk density of the soils. While vermicompost treatments increased aggregate stability of loamy soils remarkably, such effects were not remarkable in clay soils. © 2020 Namik Kemal University - Agricultural Faculty. All rights reserved.Öğe Improvement of Soil Quality Parameters by Municipal Solid Waste Compost Application in Clay-Loam Soil(2020) Yüksel, Orhan; Kavdır, YaseminOrganic matter (OM) content of the soils should be improved for sustainable productions. Municipalsolid waste compost (MSWC) is an organic material used in several countries to improve soil OMcontents. This study was conducted to determine potential use of MSWC as soil amendment. Fieldexperiments were conducted for two years with single MSWC treatments. Experiments wereconducted on 18 plots in randomized complete blocks design with 3 replications. Six differentMSWC doses (0, 40, 80, 120, 160 and 200 t ha-1) were applied to experimental plots. Compost doseswere calculated in dry weight basis, applied to 21 m2 plots and sunflower was sown as theexperimental plant of the study. Following the sunflower harvest, disturbed and undisturbed soilsamples were taken from the experimental plots and soil samples were subjected to various analyses.Applied MSWC doses significantly increased soil OM contents, electrical conductivity (EC) andcation exchange capacity (CEC), aggregate stability (AS) and saturated hydraulic conductivity(Ksat) and reduced soil bulk density (BD). Effects of MSWC on soil pH were not found to besignificant. Effects of MSWC treatments were more remarkable with increasing doses. MSWCtreatments increased soil OM contents about 3 folds and increased CEC by about 25%. MSWCtreatments significantly increased salt contents of the soils. Such increases were found to besignificant at 1% level in the first year and 5% level in the second year. Increasing OM contents alsoincrease soil aggregation, thus reduced bulk density and increased hydraulic conductivity.Correlation analysis revealed significant correlations between OM and AS. Present findings revealedthat MSWC positively influenced physical and chemical characteristics of clay-loam soils of aridand arid climates, but salt contents should carefully be monitored in repetitive uses.Öğe Influence of municipal solid waste compost application on heavy metal content in soil(Springer, 2015) Yüksel, OrhanMunicipal solid waste composts (MSWC) are widely used over agricultural lands as organic soil amendment and fertilizer. However, MSWC use may result in various adverse impacts over agricultural lands. Especially, heavy metal contents of MSWC should always be taken into consideration while using in agricultural practices. The present study was conducted to find out heavy metal contents of municipal solid waste compost (MSWC) and to investigate their effects on soils. Experiments were carried out in three replications as field experiments for 2 years. Dry-based MSWC was applied to each plot at the ratios of 0, 40, 80, 120, 160, 200 t ha(-1). Results revealed that heavy metal content of MSWC was within the allowable legal limits. Compost treatments significantly increased Cu, Zn, Ni, Cr, Cd, and Pb content of soils (p < 0.01). Increasing soil heavy metal contents were observed with increasing applied compost doses. Although compost treatments significantly increased soil heavy metal contents, the final contents were still within the allowable legal limits. Results showed that MSWC doses over 10 t ha-1 may create a heavy metal risk in long term for soils with pH= 7. Therefore, in MSWC use over agricultural lands, heavy metal contents should always be taken into consideration and excessive uses should be avoided.Öğe Meriç Nehri (Türkiye) Teraslarında Oluşan Toprakların Bazı Profil ve Verimlilik Özelliklerinin Belirlenmesi(2019) Yüksel, Orhan; Ekinci, HüseyinBu çalışma, Meriç Nehri’ne farklı uzaklık ve yükseklikte yer alan alüviyal teraslar üzerinde oluşmuştoprakların bazı profil ve verimlilik özelliklerini incelemek amacıyla yapılmıştır. Meriç nehrine dikeykonumda ve farklı uzaklıklarda yer alan dört farklı noktada açılan toprak profillerinin horizon tanımlamasıyapılmıştır. Söz konusu profillerden 28 adet bozulmuş toprak örneği alınarak bu örneklerde bazı fizikselve kimyasal analizler yapılmıştır. Profil 1 (P1), profil 3 (P3) ve profil 4 (P4)’ün bulunduğu arazilerde çeltiktarımı yapılırken, profil 2 (P2) çok uzun süreden beri mera olarak kullanılan bir arazi üzerindeincelenmiştir. Araştırma topraklarının organik madde içerikleri genel olarak “az” ve “çok az” olarakbulunmuştur. En yüksek organik madde değeri P2 de A1 horizonunda (%3,22) ve profil 4 de Aphorizonunda (%2,09)’dır. Toprakların pH değerleri genel olarak “hafif asit” ve “nötr” karakterde olupkireç içerikleri P2 de “kireçli”, diğer profillerde “az kireçli” sınıfındadır. Araştırma örneklerinde P2’detuzluluk sorununa rastlanmıştır. Bu profilde horizonların EC değeri A1 horizonunda 6,51 dS m-1 olarakbulunmuştur. Aynı şekilde bu horizonda Na içerikleri de çok yüksek bulunmuştur. P2, topoğrafik olarakdiğer profillere göre daha çukur bir konumda olup yılın önemli bölümünde su altında kalmaktadır. Bunedenle P2 genellikle yaş olup redoksimorfik özelliklere, yüksek kil içeriğine ve buna bağlı olarak fenadrenaj koşullarına sahiptir. P1, nehire en yakın konumda olup kum içeriği diğer profillere göre yüksektir.Katyon değiştirme kapasitesi (KDK) kil içeriğine bağlı olarak profil 2 de en yüksek, P1 de ise en düşüktür.Profillerde yarayışlı besin elementi içerikleri alt katmanlara doğru azalma göstermekle birlikte profillerinüst katmanlarında fosfor (P), demir (Fe), bakır (Cu), mangan (Mn) ve çinko (Zn) içerikleri “yeterli”bazılarında “fazla” düzeydedir. Buna karşın potasyum (K) içeriği sadece P2 de “yeterli”, diğerhorizonlarda “az” düzeyde bulunmuştur.Öğe Spatial and Temporal Changes of Soil Nitrogen Contents and Determination of Nitrogen Resources by Natural Isotope Technique in Agricultural Lands(Çanakkale Onsekiz Mart Üniversitesi, 2022) Kavdır, Yasemin; Yüksel, Orhan; Sungur, Ali; Özcan, HasanIn this study, soil samples were taken at three different periods at 51 points in Çanakkale-Kumkale Plain (Troy). Soil total nitrogen (N), nitrate and ammonium contents were conducted to determine the spatial and temporal distribution of soil nitrogen. Additionally, possible sources of soil nitrogen were evaluated using δ15N isotope tools. According to δ15N results, the main source of soil nitrogen was inorganic nitrogen fertilizers in cotton, wheat, and tomato-grown soils in April. In December, most of the soil δ15N was of both organic and mineral origin. The value of soil δ15N values increased in July because of enhanced organic matter mineralization in the area. The δ15N values of the great majority of soils were between 5‰ and 10 ‰ which indicates that N was derived from organic materials. The reason for the low δ15N values in April was due to the use of excess mineral fertilizers for cotton, maize, tomato, pepper, sunflower, and wheat crops.
