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Silva Fennica 1926-1997
Acta Forestalia Fennica

Articles containing the keyword 'podzol'

Category: Article

article id 5560, category Article
Carl Johan Westman. (1995). A simple device for sampling of volumetric forest soil cores. Silva Fennica vol. 29 no. 3 article id 5560.
Keywords: fine roots; soil density; sampling; root biomass; soil samples; podzolic soil; spatial sampling
Abstract | View details | Full text in PDF | Author Info

A simple, manually-operated and easily portable device for sampling volumetric soil cores to a depth of 100 cm with a minimum soil disturbance is described. The device consists of a sample tube, a sampler and an extension tube. A dead blow nylon mallet is used to force the sampler into the soil and a small winch attached to an aluminium tube pulls the sampler from the soil. The total weight of the equipment (sampler, mallet and winch) is 18.5 kg and may be carried in the trunk of a small car. Sampling is easily done by one person in good physical condition but four-handed operation is recommended as more efficient. The sampling device has been in heavy use during the summers of 1993–95 when several hundred soil cores have been extracted on various sites all over Finland.

  • Westman, E-mail: cw@mm.unknown (email)
article id 5416, category Article
Carl Johan Westman. (1990). Metsämaan fysikaaliset ja fysikaalis-kemialliset ominaisuudet CT-OMaT kasvupaikkasarjassa. Silva Fennica vol. 24 no. 1 article id 5416.
English title: Soil physical and physio-chemical properties of Finnish upland forest sites.
Original keywords: kasvupaikkatyyppi; ravinteisuus; kationinvaihtokapasiteetti; podzoli
English keywords: pH; fertility; site factors; podzols; porosity; CEC
Abstract | View details | Full text in PDF | Author Info

In soil profiles from a series of uplands of different site types bulk density, density of solids and porosity of soil were clearly related to soil organic matter content and its distribution in the soil profile. Soil organic matter contents were also strongly correlated to effective cation exchange capacity (CEC) and soil acidity. Site fertility was primarily related to the fine fraction (ø<0.06 mm) content in the C horizon and related properties (i.e. CEC). In the humus layer, the content of exchangeable bases and base saturation most strongly related to site fertility.

The PDF includes an abstract in English.

  • Westman, E-mail: cw@mm.unknown (email)
article id 5345, category Article
Leo Koutaniemi, Raimo Koponen, Kyösti Rajanen. (1988). Podzolization as studied from terraces of various ages in two river valleys, Northern Finland. Silva Fennica vol. 22 no. 2 article id 5345.
Keywords: boreal forest; Finland; Lapland; nutrient concentration; podzol; podzolization; taiga
Abstract | View details | Full text in PDF | Author Info

The study was made in the Ivalojoki and Oulankajoki valleys, consisting of terraces of well sorted sandy material aged 9500–300 B.P. The vegetation is characterized by dry and moderately dry forest types with Scots pine (Pinus sylvestris L.) as the dominant tree species. The study included: forest types, particle size and sorting of mineral horizons, thickness of horizons, amount of organic material, pH, electrical conductivity, and NH4OAc (pH 4.56) extractable Fe, Al, P, K, Mg, Mn and Zn concentrations. The principal aim was to study the interrelationships between all these properties with special reference to the age of the soil.

The results allowed a distinction to be made between the following categories: (1) features typical of podsolization (e.g. increase in leaching of Fe and Al with age of soil from the A2), (2) certain factors showing higher values in the north (Ivalo) than in the south (Oulanka), principally Fe and Mg, (3) declining trends in P, Mg, Mn and Zn concentrations with age, which may partly be due to the geological history, and (4) declining trends in amount of organic material and electrical conductivity with age, these both being factors arising from the geological history rather than from podzolization.

The PDF includes a summary in Finnish.

  • Koutaniemi, E-mail: lk@mm.unknown (email)
  • Koponen, E-mail: rk@mm.unknown
  • Rajanen, E-mail: kr@mm.unknown

Category: Article

article id 7047, category Article
O. J. Lukkala. (1920). Lisä ortsteinikysymyksen valaisemiseksi. Acta Forestalia Fennica vol. 16 no. 5 article id 7047.
English title: Studies on the effect of ortstein on paludification.
Original keywords: soistuminen; podsoli; ortstein
English keywords: paludification; podzol; ortstein
Abstract | View details | Full text in PDF | Author Info

No agreement has yet been reached about formation of podzols, and their distribution in Finland has not been studied. It is, however, known that most of the forest soils are leached. The compacted ortstein is relatively rare in Southern Finland, but common in the gravely soils in Lapland. This study focuses on whether ortstein formations facilitate paludification. The study is based on observations in drained peatlands in Toivakka and Multia. Ortstein can rarely be found under the actual peatlands. It is often formed in mineral soil threshold areas, where it can be up to one meter thick. The ortstein formation was stronger in poorer soil types. Also, it is compacted into a harder layer in gravely soils than in sandy soil. These formations seem to be caused by humus-rich water flowing from the peatlands.

The soil is not leached, and ortstein is not formed in wet, low-lying peatlands, and has, therefore, no role in their paludification. In drier peatlands, especially in slopes, an A horizon can be found. However, ortstein seems not to have a marked effect on paludification. When ortstein is formed in mineral soil threshold areas, their formation seems to be caused by water flow from the peatland. It may make the threshold area more compact, and thus further facilitate paludification.

The PDF includes a summary in German.

  • Lukkala, E-mail: ol@mm.unknown (email)

Category: Research note

article id 679, category Research note
Hans-Örjan Nohrstedt, Gunnar Börjesson. (1998). Respiration in a forest soil 27 years after fertilization with different doses of urea. Silva Fennica vol. 32 no. 4 article id 679.
Keywords: mineral soil; Pinus sylvestris L.; carbon mineralization; humus; podzol
Abstract | View details | Full text in PDF | Author Info
A number of previous studies have shown that N fertilization often reduces respiration in forest soils. However, the durability of this effect has not been fully explored. In this study, the response of soil respiration to a single fertilization with urea, applied 27 years earlier, was examined in a field experiment located in a stand of Pinus sylvestris in central Sweden. The doses that had been added were 120, 240 and 600 kg N ha–1. Samples were taken from the humus layer and the upper 7.5 cm of the mineral soil. Sieved samples were incubated in the laboratory. No effect of the previous fertilization on soil respiration was found, thus indicating that the reduction shown in earlier studies is not persistent. There was a tendency that the highest N dose had caused a higher N concentration and a lower C/N-ratio in the humus layer and a higher C concentration in the mineral soil.
  • Nohrstedt, The Forestry Research Institute of Sweden, Uppsala Science Park, S-751 83 Uppsala, Sweden E-mail: (email)
  • Börjesson, Department of Microbiology, Swedish University of Agricultural Sciences, P.O. Box 7025, S-750 07 Uppsala, Sweden E-mail:

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