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To identify the sources of contamination with potentially toxic elements (PTEs) in roadside orchard soils and to evaluate the potential ecological and environmental impacts in Gaziantep, soil samples from 20 mixed pistachio and olive orchards on roadsides with different traffic densities and at different distances to the roads were analyzed. Concentrations were 23,407.36 ± 4183.76 mg·kg−1 for Fe, 421.78 ± 100.26 mg·kg−1 for Mn, 100.20 ± 41.92 mg·kg−1 for Ni, 73.30 ± 25.58 mg·kg−1 for Cr, 65.03 ± 12.19 mg·kg−1 for Zn, 60.38± 7.91 mg·kg−1 for Pb, 17.74 ± 3.35 mg·kg−1 for Cu, 14.93 ± 4.94 mg·kg−1 for Co, and 0.30 ± 0.12 mg·kg−1 for Cd. It was found that the Ni content in 51% and the Cr content in 18% of orchard soils were above the legal limits for agricultural soils (pH > 6) in Türkiye. Factor analysis (FA) showed that Co, Cr, Cu, Fe, Mn, Ni, and Pb loaded on the first factor (FC1), while Cd and Zn loaded mostly on the second factor (FC2). It was found that Cr, Ni, and Pb were primarily enriched through pedogenic processes, whereas Cd most likely originated from agricultural activities, while the impact of road traffic as source of PTE contamination was insignificant. It has been revealed that the soils are of low quality for agricultural production due to PTE contamination (PIave ≥ 1). The SOPI values from environmental and ecological individual indices showed that the soil pollution level was moderate for Cd, Ni, and Pb, and low for Cr. The soil pollution index (SOPI) proved to be suitable for evaluating and comparing PTE pollution in regions with different soil properties.

This research was conducted to determining the fertility of the agricultural lands and mapping thematically in Osmaniye. Soil texture of the samples ranges from sandy loam to silty clay, with 33% coarse and 67% clay. The pH of the soil samples was predominantly medium alkaline, and the half of the samples' EC were in the light salty class. Almost all of the samples were calcareous and mostly lack in organic matter. Overall, 50% of soil samples sustained insufficient and 50% possessed sufficient level of available phosphorus (P). Available magnesium (Mg) content was sufficient (except 8%); available calcium (Ca) was at high levels; available sodium (Na) levels were found in 5% of the soils. Available zinc (Zn) was low in all samples; nearly all samples were insufficient iron (Fe) available; Manganese (Mn) and copper (Cu) levels were found sufficient in almost all of samples. Available boron (B) was found at insufficient level in 12% of the soils. Important relationships have been determined between nutrient content and soil properties. Maps of soil properties were made by using geographic information systems and the distribution of the features over the area has been determined. Fe, Zn and P soil fertilization should be done according to soil analysis Research Article

Önemli bir potansiyele sahip olan Zeytin yetiştiriciliğinde, periyodisite ile beraber verim kaybının nedenleri bahçelerdeki bitki besleme durumu ve su yetersizliğidir. Çalışma, Kilis’te zeytin yetiştiriciliği yapılan toprakların bazı fiziksel, kimyasal özellikleri ve besin elementi içeriklerinin belirlenmesi için yürütülmüştür. Analizler, Merkez, Musabeyli, Elbeyli ve Polateli ilçelerinden 40 farklı köyden toplam 49 bahçeden aynı zamanda alınan toprak (0-30 cm) örneklerinde yapılmıştır. Toprak örneklerinde; alınabilir B, Fe, Cu, Zn, Mn analizleri yapılmıştır. Toprakların bor içeriğinin %34.7’si az, %65.3’ü yeterli, Fe ve Cu içeriklerinin tamamının yeterli, Zn içeriğinin %28.6’sının çok az %65.3’ünün az %6.1’inin yeterli olduğu, Mn bakımından ise toprakların % 26.5’inin yeterli, %73.5’inin fazla olduğu belirlenmiştir. Ayrıca toprakların %58.3’ünün P, %27.1’ininde Mg bakımından yetersiz olduğu belirlenmiştir. B, Zn, P ve Mg bakımından önemli bitki beslenme sorunlarının olduğu belirlenmiştir. Mangan yönünden toprakların büyük bölümünün sınır değerlerin üzerinde olduğu belirlenmiştir. Kilis ilinde gerçekleştirilen bu çalışmanın sonuçları dikkate alındığında zeytin yetiştirilen alanlarda Zn ve B gübrelerinin topraktan veya yapraktan uygulanması gerekliliği ortaya çıkmıştır.