Abstract
PREVIOUSLY, Mack and Barber1 found that phosphorus fractions in soils are affected by freezing. They showed that more water-soluble phosphorus was released from soil which had been previously frozen at − 20.5° C. than from one incubated at 2.7° C. To examine the effect of temperature (from + 24 down to − 196° C.) on nitrate release a brown forest soil (Grenville silt loam) having an organic matter content of 5.6 per cent was selected. The soil was sampled in the field and stored in a moist state in a controlled temperature room at + 1° C. until required for three experiments.
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References
Mack, A. R., and Barber, S. A., Soil Sci. Soc. Amer. Proc., 24, 381 (1960).
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MACK, A. Low-Temperature Research on Nitrate Release from Soil. Nature 193, 803–804 (1962). https://doi.org/10.1038/193803a0
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DOI: https://doi.org/10.1038/193803a0
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