Study on the organic carbon and total nitrogen reserves in brown soils in the Chirchik river basin: A case study of Tashkent region, Uzbekistan

To identify the role in carbon stabilization, the content and reserves of SOC and TN in brown soils of the middle mountains of the Chirchik river basin of the Tashkent region of Uzbekistan were investigated in connection with the climatic conditions of the slopes of various topographic aspects. The content and reserves of SOC and N were the highest in the soils of the northern slope, and the lowest in the soils of the southern slopes; the eastern slopes, in this respect, occupied an intermediate position. The climates of slope exposures were the main factors influencing on the content and reserves of SOC and N in the profile of brown soils, indicating the need for separate consideration of carbon emissions from soils which are developed on slopes of various topographic aspects.

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