Person: BAŞAR, HALUK
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BAŞAR
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HALUK
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Publication The determination of soil boron fractions, their relationships to soil properties and the availability to olive ( olea europea l.) trees(Taylor & Francis Inc, 2019-04-14) Gürel, Serhat; GÜREL, SERHAT; Başar, Haluk; BAŞAR, HALUK; Keskin, Ece; Dirim, Mehmet Sabri; DİRİM, MEHMET SABRİ; Bursa Uludağ Üniversitesi/Ziraat Fakültesi; 0000-0003-0019-3482; 0000-0001-9901-6499; AAH-3316-2021; AAH-2469-2021This study was conducted to investigate the various boron fractions in olive tree grown soils. The correlations between boron fractions in leaves, fruits and soil properties were examined. For this purpose cv "Gemlik" olive (Olea europaea L.) orchards were visited. Soil samples from 0-30 cm and 30-60 cm deep, the leaf and fruit samples were collected. The greatest proportion of total soil boron is present in residual form (85-88%). It is followed by organically bound B (2.84-4.50%), specifically adsorbed on soil colloid surfaces (0.93-1.31%), oxides (manganese oxyhydroxides, amorphous Fe and Al oxides, crystalline Fe and Al oxides) bound B (7.27-8.31%). The smallest one readily soluble (extracting plant available) boron values were composed of only 0.40-0.50% of total boron ranging. To determine readily soluble boron five different extraction solutions were in the order Hot water > 0.01 M CaCl2 > 1 M NH4OAc > 0.1 M KCl > 0.005 M DTPA. Fruit boron concentration and soil boron fractions showed close correlations than leaf boron concentration.Publication Heavy metal status of pear trees grown in southeastern marmara region of Turkey(Scibulcom, 2015-01-01) Gürel, S.; Başar, Haluk; Gürel, S.; BAŞAR, HALUK; Uludağ Üniversitesi/Ziraat Fakültesi/Toprak Bilimleri ve Bitki Besleme Bölümü; AAH-2469-2021; JKU-4587-2023This study was managed to characterise the metal accumulation in the soils, fruits and leaves of pear (Pyrus communis L.) trees located in the southeastern Marmara region of Turkey. The research was performed in 76 orchards. The pear cultivars were `Deveci' and 'Santa Maria' in towns of Bursa province. To determine levels of pollution, soils and aboveground parts (leaf, fruit flesh and fruit peel) of the trees were sampled and analysed for some metals. Total amounts of Cr were found to be at the excessive levels in soils. Nickel concentrations were slightly higher than the permissible ranges in minority of the soils. Contrarily, their concentrations in the different plant parts were not at the toxic level. Because of lack of standard concentrations indicating excessive concentration of extractable elements, statuses of extractable elements in the soils were not evaluated. Metal accumulation in the trees were not estimated by both leaf and fruit analysis. As a result, the appearance of metals in soils might be due to agricultural activities and parent material. Continuous monitoring and future studies of the pear orchards are recommended to ascertain long-term impacts of pollution on the trees.Publication Response of Gemlik olive trees to soil and foliar treatments of iron in combination with zinc and boron(Taylor, 2015-07-04) Başar, Haluk; Gürel, Serhat; BAŞAR, HALUK; GÜREL, SERHAT; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Toprak Bilimi ve Bitki Besleme Bölümü; AAH-2469-2021; EXS-1398-2022This research was conducted to determine the effectiveness of various treatments in correction of single deficiency of iron (Fe) and multiple deficiencies of Fe, zinc (Zn), and boron (B) in an olive cultivar (Gemlik) in the southeastern Marmara region of Turkey. This study was consisted of four field experiments, which included control, soil and foliar applications of Fe alone, and combinations with Zn and B. Soil applications of the compounds were only performed in the first year of the experiments to estimate residual effect of soil applications in the following year. Foliar applications were sprayed onto leaves two and four times at two doses in consecutive years. Soil application of iron sulfate did not increase Fe concentrations in the both leaves and fruits. Foliar applications of iron sulfate considerably elevated leaf total and active Fe concentrations, but the effect of the foliar applications on fruit Fe concentrations was small. Two foliar applications of iron in each season seemed to be appropriate treatment in the all experiments, as well. To maintain sufficient Fe concentrations, especially in the newly developing tissues of olive trees, foliar application of Fe should be conducted at least four times at the lowest dose as performed in the experiments. Foliar applications of double and triple combinations of iron sulfate with zinc sulfate and borax increased significantly B and Zn concentrations in the trees, as well.Publication Mineral nutrient composition of leaves and fruits of black table olive CV. Gemlik(Bangladesh Botanical Soc, 2015-12-01) Başar, Haluk; Gürel, Serhat; BAŞAR, HALUK; GÜREL, SERHAT; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Toprak Bilimi ve Bitki Besleme Bölümü; AAH-2469-2021; EXS-1398-2022A comparative study on mineral composition of the olive trees was made to see the changes in the content of the nutrient elements in the component (leaf and fruit) parts. Differences between the leaf and fruit mean concentrations of the whole elements examined were found to be statistically significant. Potassium and boron concentrations in the fruits were higher than that of the leaves. But, the concentration of the rest of the elements in the fruits was lower than the leaves.