Unver I.,Ankara University |
Madenoglu S.,Soil Fertilizer and Water Resources Central Research Institute |
Dilsiz A.,Soil Fertilizer and Water Resources Central Research Institute |
Namli A.,Ankara University
Geoderma | Year: 2013
Influence of rainfall and temperature on DTPA (diethylene triamine pentaacetic acid) extractable nickel (DNi) and fractional (DNi/total Ni=F-DNi) concentrations of soils derived from ultramafic serpentine rock under temperate semiarid continental and Mediterranean climates were studied. All serpentinite areas in Western Anatolia and the East Thrace (ca. 400,000km2 areas) were targeted. Meteorological data from 185 stations versus so-called phytoavailable Ni concentrations of 192 serpentine soil samples were examined. Digital elevation model (DEM), ANUSPLIN and ARC GIS 8.1 software packages for generation of climatic surfaces and analysis were employed for extrapolation of the weathering conditions in preparing comparative maps. Total Ni concentrations (TNi) were in the range of 25.7-2680mgkg-1, whereas DNi were between 0.08 and 143mgkg-1. The correlation between Ni extractability and the pH was weak (R2=0.175). This restricted effect may be attributed to the soil pH varying between neutral and slightly alkaline. Average DNi concentrations of the soil samples grouped within the province borders indicated that both precipitation and air temperature might be effective on the amount of DNi in the serpentine soils studied. The combined effect of annual precipitation and mean atmospheric temperature were significant (P<0.01) on DNi. The differences between the climatic zones were distinct and generally increasing with the increase of annual rainfall and mean air temperature. © 2013 Elsevier B.V.
Ozbek K.,Field Crops Central Research Institute |
Cebel N.,Soil Fertilizer and Water Resources Central Research Institute |
Unver I.,Ankara University
Turkish Journal of Agriculture and Forestry | Year: 2014
Conspicuous vegetation entities of pedogenic soils rich in cadmium and their diethylene triamine pentaacetic acid (DTPA)-extractable Cd content (DCd) under the temperate continental and Mediterranean climatic conditions of western Anatolia were determined. Foliage of herbaceous plants and nearby soil samples was collected from 51 zinc mining areas. DCd content was found to reach 11.6%-16.2% of the total Cd content, indicating more extractability than in many other heavy metals. Growth chamber and nursery experiments were conducted with the seeds collected. Dactylis glomerata and Galium tenuissimum subsp. tenuissimum, both common in grazing lands, were found to be accumulating 23.5 mg Cd kg-1 and 22.3 mg Cd kg-1 dry matter, respectively, which are highly phytotoxic levels. Thlaspi praecox, known as a Cd-hyperaccumulating plant species, could not be successfully introduced into the Cd-rich mining soils under controlled conditions, suggesting genetic variation or inability to adapt. Volunteer species under controlled conditions included Poa bulbosa and Plantago lanceolata, both of which were potential Cd-hyperaccumulating candidates. Silene aegyptiaca and Silene vulgaris were other species commonly found around zinc mines and they were grown under controlled conditions without difficulty. However, Cd concentrations in the above-ground tissues of all species mentioned above were not over the 100 mg kg-1 dry matter threshold value for hyperaccumulating cadmium. © TÜBİTAK.
Gokalp Z.,Erciyes University |
Tas I.,Harran University |
Ozkay F.,Soil Fertilizer and Water Resources Central Research Institute |
Akgul S.,Soil Fertilizer and Water Resources Central Research Institute
African Journal of Agricultural Research | Year: 2011
Demand for water is increasing in the world parallel to increase in population and industrialization. Thus, efforts are geared toward finding ways of utilizing the previously unused sources of water and/or recycling wastewater. Sustainability and effective use are the vital issues for these new sources of water as well as the existing ones. This study examined the possible use of treated wastewater of Ankara Wastewater Treatment Plant over agricultural areas for irrigation purposes. It focused on effective ways in which cleaned water can be used for agricultural purposes and on the economic advantages of such use. Implications for sustainable water management were also discussed. ©2011 Academic Journals.
Ozbahce A.,Soil Fertilizer and Water Resources Central Research Institute |
Tari A.F.,Harran University |
Gonulal E.,Soil and Water and Combating Desertification Research Station |
Simsekli N.,Soil and Water and Combating Desertification Research Station |
Padem H.,International BURCH University
Archives of Agronomy and Soil Science | Year: 2015
In this study, the effects of different zeolite doses (Z0:0, Z3:30, Z6:60, Z9:90, and Z12:120 t ha−1) and water levels (I50: 0.50, I75: 0.75, and I100:1.00) on yield, quality, and nutrient absorption of common bean were evaluated under arid conditions in Karapinar Konya, Turkey, in 2011 and 2012. The experiment was carried out in a split-plot design with three replications. The results showed that in each treatment different doses of zeolite together with changes in the rate of irrigation levels effected yield and yield components. Water use efficiency was also affected by zeolite and irrigation treatments. The highest yields, 4777 and 4114 kg ha−1, respectively, were obtained from the Z9I100 application in 2011 and 2012. During the experimental years, water consumptions at the same treatment were determined 451 and 468 mm, respectively. In addition to this, zeolite treatments affected the contents of N, K, Zn, Mn, and Cu in leaf samples (p < 0.05). These nutrient levels increased with raising zeolite doses. © 2014, © 2014 Taylor & Francis.
Ozbahce A.,Soil Fertilizer and Water Resources Central Research Institute
Australasian Plant Pathology | Year: 2014
In this study, the effect of fungicides used to control the soil-borne pathogen (Fusarium oxysporum f.sp.melonis), on melons growth (Cucumis melo cv. EdalI), under water stress was researched. The experiment was conducted in a field naturally infested as in a split-plot design with four replications in 2011-2012, at Çumra in the Konya Plain, Turkey. The main plots were four levels of water supply. Irrigation was supplied at the appropriate crop development stage with enough water to fill the soil depth of 0-90 cm to capacity (I1), 25 % (I2), 50 % (I3) decreased water supply levels and in a water-free (I4) condition were maintained. In subplots, fungicides that are no fungicide (F0), Fludioxonil + Metalaxyl-m (F1) and Hymexazol (F2) were used. The F1 (250 ml da-1) and F2 (500 ml da-1) were drip chemigated at planting and again 15 days after planting. Both fungicides applied through chemigation were similarly effective on soil-borne pathogen management and resulted in yields higher than untreated control in both years. The highest yield (2.88-3.75 t da-1) was obtained under no water stress (I1) and F1 applications (p∈<∈0.01). Other fruit quality parameters were significantly affected by treatments. The seasonal water consumptive use (ET) of I1 treatment was recorded at 470 and 501 mm, respectively, for both years. © 2014 Australasian Plant Pathology Society Inc.
Kusvuran A.,Çankiri Karatekin University |
Kiran S.U.,Soil Fertilizer and Water Resources Central Research Institute |
Nazli R.I.,Cukurova University |
Kusvuran S.,Çankiri Karatekin University
Fresenius Environmental Bulletin | Year: 2015
A screening study was conducted in order to determine the genotypic differences of 20 maize varieties, and to evaluate the mechanism of ion regulation under salt stress conditions. The study was arranged in a completely randomized plot design with 4 replications under controlled conditions in 2013. Seeds were planted in plastic pots with a mixture of peatperlite at a ratio of 2:1. At 27 days after sowing, the salt (NaCI) treatment was started. The varieties were classified according to the severity of the leaf damage symptoms, using symptoms score of 1-5. The fresh and dry shoot weights, fresh and dry root weight, leaf number, plant height, stem diameter, relative water content, and the shoot and root concentrations of sodium, potassium, calcium, and chlorine were also investigated. The varieties exposed to 250 mM NaCI application developed different mechanisms to be protected against toxic effects of Na ion. Salt tolerant varieties limited Na accumulation and acted selectively among ions. K and Ca concentrations were high in shoot and root in which Na concentration was low, and tolerant varieties had higher K/Na and Ca/Na ratios than sensitive varieties. In conclusion, the maize varieties showed a wide variation in their response to salt stress. Reliable and effective screening parameters, such as scale, shoot and root freshdry weight, ion content, for determination of salt tolerance level of the maize varieties were discussed. Overall findings suggest that PG 1661, Ada 523, Colonia, PG Pasha, and PG 1610 varieties were more tolerant varieties than the other ones.
Koksal E.S.,Ondokuz Mayis University |
Ustun H.,International Agricultural Training Center |
Ozcan H.,Soil Fertilizer and Water Resources Central Research Institute |
Gunturk A.,Soil Fertilizer and Water Resources Central Research Institute
Pakistan Journal of Botany | Year: 2010
In this study, the relationship between leaf pigment concentration (analyzed in the laboratory) and four spectral indexes (measured in the field) was investigated. For this purpose, field experiments consisting of six different irrigation treatments were conducted with dwarf green beans during 2005 growing season. Based on spectral data, spectral indexes were plotted against pigment concentration. Results showed that under water stress, the chlorophyll and carotene contents of green bean leaves rose. According to linear regression analysis between spectral indexes and pigment contents, the Normalized Difference Pigment Chlorophyll Index (NPCI) and Normalized Difference Vegetation Index (NDVI) had the highest correlations with the chlorophyll (a, b and total), and carotene content of leaves.
Kale S.,Suleyman Demirel University of Turkey |
Karabulut A.,Soil Fertilizer and Water Resources Central Research Institute |
Ergul F.,Izmir Development Agency
Journal of Food, Agriculture and Environment | Year: 2012
Trace element transfer model was performed to estimate salt loading in soil on 1500-hectare study area located on Kesikkopru Basin of Central Anatolia Region in Turkey. The model was run for 43 sampling locations, which are selected from different crop patterns and different soil types. The predicted and measured salt loads in soil were compared at the end of the study period. The soil salinity observation data and model estimation results in different depths were prepared as a geodatabase to be integrated into ArGIS. The salinity map was produced by ordinary kriging interpolation method. According to statistical evaluations, model showed acceptable prediction for soil salinity with the coefficient of determination (R 2) values (0.75 to 0.88) and modeling efficiency (E) values (0.58 to 0.72). Also, the model was run for the next 10 years to simulate soil salinity changes in the future. The results show that salinity will be a potential risk for the basin in the future. The salinity projection in soil for 2014 was estimated with leaching and without leaching fractions. While the salinity in soil profile varied between 8 and 12 dS m -1 without leaching, the salinity amount reduced drastically to 0-6 dS m-1 with leaching applications.
Ozbahce A.,Soil Fertilizer and Water Resources Central Research Institute |
Zengin M.,Selcuk University
Journal of Plant Nutrition | Year: 2014
This study was carried out in order to determine the effect of various manganese fertilizers [manganese sulfate (MnSO4.3H2O) (MS), 27% manganese (Mn) and manganese ethylenediaminetetraacetic acid (Mn-EDTA) (ME), 12% Mn], their doses (0, 6, 9, 12 mg Mn kg-1 for the soil and 0, 0.2, 0.3, 0.4% for the leaf) on yield and net return of dwarf bean. Field experiments were conducted in the randomized blocks split plot design with four replications under Konya ecological conditions in Turkey. Soil applications were made on bands as a single application at sowing whereas foliar applications (FA) were made at two times. Results of the field experiments showed the highest bean yields were significantly obtained by the fertilizer of ME-FA sprayed (243.80 and 257.74 kg da-1). For both years, the lowest yields were obtained by the MS-SA applications (166.97 and 180.60 kg da-1). The maximum net income was US $104.16 da-1 and US $156.06 da-1 by years. © 2014 Copyright Taylor and Francis Group, LLC.