P. Kokkonen 
Observations on the soil frost of the winter 1941-1942
Kokkonen P. (1942). Observations on the soil frost of the winter 1941-1942. Acta Forestalia Fennica vol. 50 no. 22 article id 7375. https://doi.org/10.14214/aff.7375
Abstract
Soil frost from the winter 1941-1942 was of a special form. To create such a strong soil frost there need to be capillary soil form and long period of permanent and intense cold, meaning minus temperatures. The frost layer was thicker than normally.
Such a frost causes many problems on the fields and roads when the soil rises because of the frost and then falls unevenly back when the frost melts.
The PDF contains a summary in Finnish.
Keywords
soil frost;
formation
Published in 1942
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