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    Effects of Different Land Use on Soil C and N Dynamics and Soil Chemical Characteristics
    (Gültekin ÖZDEMİR, 2025) Yanardag, İbrahim Halil
    This study aimed to evaluate the effects of different land use types (quince, almond, wheat, persimmon, cherry, and sour cherry) on soil chemical properties and carbon (C) and nitrogen (N) dynamics in semi-arid calcareous soils. Soil parameters, including pH, electrical conductivity (EC), organic matter (OM), CaCO?, and macro- and micronutrients (N, P, K, Fe, Zn, Cu, Mn) were analyzed. Multivariate approaches such as Principal Component Analysis (PCA), Hierarchical Cluster Analysis (HCA), and correlation analysis were employed to identify patterns across land uses. Results indicated that soil pH remained alkaline (7.59–7.86) and relatively stable among land uses, while EC values suggested a low salinity risk. Soil organic matter was higher in wheat fields (3.13%) compared to orchards (2.14–2.35%), whereas orchard systems supported greater microbial activity, with cherry showing the highest biomass N (39.78 mg kg?¹). Wheat soils contained higher levels of available P (35.20 mg kg?¹), Fe (7.08 mg kg?¹), and Zn (2.48 mg kg?¹) than orchards, where micronutrient availability was comparatively lower. PCA and HCA distinguished orchard and annual cropping systems, highlighting contrasting soil fertility profiles shaped by land use. These findings emphasize the role of perennial systems in sustaining microbial activity and the vulnerability of annual systems to organic matter depletion. The study contributes to sustainable soil management by demonstrating how land use influences nutrient dynamics and guides integrated management strategies in calcareous, semi-arid regions.
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    Evaluation of Malatya province soils for apricot cultivation
    (Harran University, 2025) Yanardag, İbrahim Halil
    Malatya is the world’s leading region in terms of dried apricot production. Understanding the optimal soil conditions for apricot growth is crucial for enhancing production. This study evaluated the soil fertility status of apricot orchards in Malatya province by analyzing key physicochemical soil properties and mapping their spatial variability using Geographic Information Systems (GIS). Malatya soils generally have high lime content (26.79%), neutral to slightly alkaline pH (7.25–8.13), high levels of Ca (5534.40 mg kg?¹) and K (633.25 mg kg?¹), moderate Fe (3.26 mg kg?¹), and low levels of organic matter, Zn (0.48 mg kg?¹), Mn (5.72 mg kg?¹), and B (0.33 mg kg?¹). While high levels of Ca and K improve fruit flavor, aroma, vitamin, and mineral content, limited availability of micronutrients restricts yield. Therefore, reducing soil pH with sulfur or acidic materials, improving soil properties by organic matter addition, and supplementing deficient micronutrients with foliar or soil applications are important for sustainable apricot production and yield improvement.