The investigation of some available trace element contents of acid soils in Turkey

The contents of available Fe, Cu, Zn and Mn of acid soils for plants were investigated. With this aim, 23 soil samples were collected from the depth of 0-20 cm in The Eastern Black Sea and Thrace regions. The differences betwen the results were due to the differences between the characteristics of these regions. While the levels of Fe, Mn and Cu contents of The Eastern Black Sea Region acid soils were found to be higher, the content of Zn was usually insufficient. In the Thrace Region, only the content of Mn was found to be sufficient; Zn, Cu and in some soils Fe deficiency were obtained. One of the reasons why the result of analysis in these regions were different from each other is due to the differences in farming practices. The available Fe, Cu, Zn and Mn contents of the soils were between 1.88-43.60; 1.92-8.60; 0.00-1.10 and 2.36-62.19 mg kg−1 for The Eastern Black Sea Region and 0.32-5.62; 0.02-0.79; 0.02-0.60 and 13.80-44.62 mg kg−1 for Thrace Region, respectively. In addition, statistics show some significant relationships between some soil properties and Fe, Cu, Zn and Mn contents of the soils which were investigated.