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Öğe Assessment of soil quality index for wheat and sugar beet cropping systems on an entisol in Central Anatolia(SPRINGER, 2017) Seker, Cevdet; Ozaytekin, Hasan Huseyin; Negis, Hamza; Gumus, Ilknur; Dedeoglu, Mert; Atmaca, Etnel; Karaca, UmmuhanThe sustainable use of agricultural lands is significantly affected by the implemented management and land processing methods. In sugar beet and wheat cropping, because the agronomic characteristics of plants are different, the tillage methods applied also exhibit significant variability. Soil quality concept is used, as a holistic approach to determining the effects of these applications on the sustainable use of soil. Agricultural soil quality evaluation is essential for economic success and environmental stability in rapidly developing regions. At present, a variety of methods are used to evaluate soil quality using different indicators. This study was conducted in one of the most important irrigated agriculture areas of Cumra plain in Central Anatolia, Turkey. In the soil under sugar beet and wheat cultivation, 12 soil quality indicators (aggregate stability (AS), available water capacity (AWC), surface penetration resistance (PR0-20), subsurface penetration resistance (PR20-40), organic matter (OM), active carbon (AC), potentially mineralizable nitrogen (PMN), root health value (RHV), pH, available phosphorus (AP), potassium (K), and macro-micro elements (ME) (Mg, Fe, Mn, and Zn)) were measured and scored according to the Cornell Soil Health Assessment (CSHA) and the Soil Management Assessment Framework (SMAF). The differences among 8 (AS, AWC, PR0-20, PR20-40, AC, PMN, AP, and ME) of these 12 soil quality characteristics measured in two different plant cultivation were found statistically significant. The result of the soil quality evaluation with scoring function in the examined area revealed a soil quality score of 61.46 in the wheat area and of 51.20 in the sugar beet area, which can be classified as medium and low, respectively. Low soil quality scores especially depend on physical and biological soil properties. Therefore, improvement of soil physical and biological properties with sustainable management is necessary to enhance the soil quality in the study area soils.Öğe Determining the Zn Content of Cherry in Field Using VNIR Spectroscopy(OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS, 2015) Dedeoglu, Mert; Basayigit, LeventVisible and near-infrared (VNIR) spectroscopy is an eco-friendly method used for estimating plant nutrient deficiencies. The aim of this study was to investigate the possibility of using VNIR method for estimating Zn content in cherry orchard leaves under field conditions. The study was conducted in 3 different locations in Isparta region of Turkey. Fifteen cherry orchards containing normal and Zn deficient plants were chosen, and 60 leaf samples were collected from each location. The reflectance spectra of the leaves were measured with an ASD FieldSpec HandHeld spectroradiometer and a plant probe. The Zn contents of leaf samples were predicted through laboratory analysis. The spectral reflectance measurements were used to estimate the Zn levels using stepwise multiple linear regression analysis method. Prediction models were created using the highest coefficient of determination value. The results show that Zn content of cherry trees can be estimated using the VNIR spectroscopic method (87. 5Öğe Identification of regional soil quality factors and indicators: a case study on an alluvial plain (central Turkey)(COPERNICUS GESELLSCHAFT MBH, 2017) Seker, Cevdet; Ozaytekin, Hasan Huseyin; Negis, Hamza; Gumus, Ilknur; Dedeoglu, Mert; Atmaca, Emel; Karaca, UmmuhanSustainable agriculture largely depends on soil quality. The evaluation of agricultural soil quality is essential for economic success and environmental stability in rapidly developing regions. In this context, a wide variety of methods using vastly different indicators are currently used to evaluate soil quality. This study was conducted in one of the most important irrigated agriculture areas of Konya in central Anatolia, Turkey, to analyze the soil quality indicators of Cumra County in combination with an indicator selection method, with the minimum data set using a total of 38 soil parameters. We therefore determined a minimum data set with principle component analysis to assess soil quality in the study area and soil quality was evaluated on the basis of a scoring function. From the broad range of soil properties analyzed, the following parameters were chosen: field capacity, bulk density, aggregate stability, and permanent wilting point (from physical soil properties); electrical conductivity, Mn, total nitrogen, available phosphorus, pH, and NO3-N (from chemical soil properties); and urease enzyme activity, root health value, organic carbon, respiration, and potentially mineralized nitrogen (from biological properties). According to the results, the chosen properties were found as the most sensitive indicators of soil quality and they can be used as indicators for evaluating and monitoring soil quality at a regional scale.Öğe THE PEDOGENIC DEVELOPMENT AND CLASSIFICATION OF SOIL DEVELOPED ON MOUNT HASANDAG'S VOLCANIC MATERIALS IN A SEMI-ARID ENVIRONMENT(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2018) Ozaytekin, Hasan Huseyin; Uzun, Cihan; Karaarslan, Emel; Dedeoglu, MertIn comparison with Andisols from humid regions, very little information is available regarding the volcanic soils of semi-arid climates. The objectives of this research were to discuss the extent to which these soils meet the requirements of real Andisols, as defined by Soil Taxonomy and to investigate the physical and chemical properties, as well as to define the weathering processes and pedogenic products, of the soils formed over the volcanic materials of Mt. Hasandag in a semi -arid environment. For this purpose, 4 representative soil profiles were evaluated; after morphological identifications were completed, the soil samples were collected from the horizons to investigate the physical, chemical, geochemical and mineralogical properties to analyze the soil formation over time in a semiarid region. The soils also underwent FT-IR and Scanning Electron Microscope (SEM) analysis in the range of 4000 to 400 cm(-1) with pellets and at magnifications ranging from 250 to 20.000 X. The results indicated that the content of the sand and coarse silt fractions were higher than 30% in all soils. Phosphate retention is generally low, and it is lower than 85% in all profiles. The pH values in NaF are lower than 9.5, in general. The bulk density is higher than 0.90 gr.cm(-3) in all profiles. The Al + 1/2 Fe percentages (by ammonium oxalate) are lower than 2% in all profiles. Selective extraction in all of the horizons in profile 5 exhibited the following relationships: Fe-o>Fe-d>Fe-p and in other profiles, and in most horizons, Al-p>Al-d>Al-0 Selective extraction indicated that in contrast to the soils usually forming on volcanic material worldwide, these soils lack noncrystalline minerals, such as allophone, imogolite and iron humus complexes. The only noncrystalline minerals that are present in great quantities are Al-humus complexes and Ferrihydrite. The crystallized Fe minerals were higher than the other Fe minerals. Feldspar (anorthite and albite), amphibole (diopside, Actinolite, tremolite, hornblende) apatite, hematite, olivine and biotite were more common primer minerals. X-ray diffraction indicates smectite, kaolinite and illite were dominant minerals in the clay fraction. Furthermore, a considerable quantity of chlorite-smectite interstrafied was identified in the clay fraction. The results indicated that the dominant soil-forming processes include the following: 1. desilication and the loss of base cations and Al from the solum; and 2. transformation of iron and aluminum from the sand and silt-size fractions into secondary clay and crystalline Fe minerals. The climate, topography and the nature of the parent materials affected by the leaching regime and weathering rates were identified as the major factors determining soil genesis on Mt. Hasandag. The studied soils were not classified as Andisol because of their lack of andic properties.
