Letter | Published:

Low-Temperature Research on Nitrate Release from Soil

Nature volume 193, pages 803804 (24 February 1962) | Download Citation



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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  1. 1.

    , and , Soil Sci. Soc. Amer. Proc., 24, 381 (1960).

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  1. Soil Research Institute, Research Branch, Canada Department of Agriculture, Ottawa.

    • A. R. MACK


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