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Abstract
In this article the effect of different nitrogen fertilizer application on the availability of zinc (Zn) content in non calcic brown forest soil was investigated. For this purpose increasing rates of NH4Cl, (NH4)2S04; NH4N03 and Ca(N03)2.4H20 fertilizers were applied for having different physical and chemical properties in two soil samples. An incubation experiment was carried out over 4 months. The available Zn content of the soils was determined each month. According to the results the highest available Zn content of the soils was obtained from NH4Cl applied to the soils followed by (NH4)2S04; NH4N03 and Ca(N03)2.4H20 application to soil. At the end of the experiment the average available Zn content of non calcic brown forest soils for NH4Cl, (NH4)2S04; NH4N03 and Ca(N03)2.4H20 fertilizers are 0.93, 0.91, 0.88 and 0.77 mg kg−1, respectively.