Articles by Ridvan Kizilkaya (2)

Relationship Between Phosphatase Activity and Phosphorus Fractions in Agricultural Soils

Ridvan Kizilkaya, Fethi Bayrakli and Abdulkadir Surucu

International Journal of Soil Science 2 ( 2 ): 107 - 118 , 2007

Heavy Metal Contents of St. John’s wort (Hypericum perforatum L.) Growing in Northern Turkey

Ali Kemal Ayan, Ridvan Kizilkaya, Cuneyt Cirak and Kudret Kevseroglu

Journal of Plant Sciences 1 ( 3 ): 182 - 186 , 2006

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