Abstract
WITH ordinary soils the results obtained in different countries show that as a rule the higher the mean temperature of the soil the greater is the carbohydrate/nitrogen (C/N) ratio. Dhar and Mukherjil have reported that in India the C/N is highest in the soils from the Punjab with the average value of 14.4, in the United Provinces it is 11.3, in Bihar it is 9.2 and in Bengal the ratio is 9.1. In Wales it is 9.2. In the State of Washington after long cultivation the value is 10.2. In the Sudan it is 12.6 and in the Transvaal it is 14.4. It seems, therefore, that the C/N ratio of normal surface soils is in general an indication of the average temperature of a locality.
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References
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DHAR, N., PANT, N. INFLUENCE OF TEMPERATURE AND pH ON THE C/N RATIO OF SOILS. Nature 149, 83–84 (1942). https://doi.org/10.1038/149083a0
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DOI: https://doi.org/10.1038/149083a0
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