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Articles by Liisa Pohjola

Category : Article

article id 5109, category Article

Esteri Ohenoja, Liisa Pohjola. (1981). Metsämaan lämpöolojen mittaaminen ruokosokerin inversioon perustuvalla menetelmällä. Silva Fennica vol. 15 no. 2 article id 5109. https://doi.org/10.14214/sf.a15050

English title: Sucrose inversion method for measuring the temperature conditions in forest soil.

Original keywords: metsämaa; maaperä; lämpötila; mittausmenetelmät; sakkaroosi-inversiomenetelmä

English keywords: forest soil; soil temperature; measurement methods; Sucrose inversion method

Abstract | View details | Full text in PDF | Author Info

The use and problems of the sucrose inversion method for the study of forest humus and soil are discussed. The method is based on the temperature dependence of sucrose inversion, changes in rotation angle being determined with a circle polarimeter. Average temperatures and thermal sums for forest humus in different forests in Finland were measured, using this method, for a period of ca. 100 days. The results are not considered definitive but are regarded rather as examples. Average temperatures were somewhat higher in the humus of dry and poor heath forests than in that of moist and herb-rich forests, with exceptions that could be explicable by topographic position.

The PDF includes a summary in English.

Ohenoja, E-mail: eo@mm.unknown
Pohjola, E-mail: lp@mm.unknown

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