In this study effective radium content and radon exhalation rates in soil samples collected from Adapazar? district of Sakarya, Turkey have been measured using LR-115 type-II plastic track detectors by closed-can technique for the first time. The obtained effective radium contents are found to vary from 6.66 to 34.32 Bqkg~(-1) with a mean value of 18.01 Bqkg~(-1). The radon exhalation rates measured in terms of mass and area of soil samples are found to vary from 50.35-259.41 mBqkg~(-1)h~(-1) with a mean value of 136.12 mBqkg~(-1)h~(-1) and 1035.18-5333.39 mBqm~(-2)h~(-1) with a mean value of 2798.57 mBqm~(-2)h~(-1). All the measurements show that the values of radium content are under the safe limit recommended by Organization for Cooperation and Development.
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