Výsledky vyhledávání - "Heikkinen, Juha"

Akademický článek

Re-calibrating stem volume models – is there change in the tree trunk form from the 1970s to the 2010s in Finland?

Autor: Kangas, Annika, Henttonen, Helena, Pitkänen, Timo, Sarkkola, Sakari, Heikkinen, Juha

Publikováno v: Silva Fennica, Vol 54, Iss 4 (2020)

The tree stem volume models of Norway spruce, Scots pine and silver and downy birch currently used in Finland are based on data collected during 1968â1972. These models include four different formulations of a volume model, with three different comb

Externí odkaz: https://doaj.org/article/1ab163a22ed44964a19e5bfbb94990f6

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Akademický článek

Two-stage, model-assisted estimation using remotely sensed auxiliary data

Autor: McRoberts, Ronald E., Næsset, Erik, Heikkinen, Juha, Strimbu, Victor

Publikováno v: In Remote Sensing of Environment 1 June 2024 307

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Akademický článek

Stratification of regional sampling by model-predicted changes of carbon stocks in forested mineral soils

Autor: Peltoniemi, Mikko, Heikkinen, Juha, Mäkipää, Raisa

Publikováno v: Silva Fennica, Vol 41, Iss 3 (2007)

Monitoring changes in soil C has recently received interest due to reporting under the Kyoto Protocol. Model-based approaches to estimate changes in soil C stocks exist, but they cannot fully replace repeated measurements. Measuring changes in soil C

Externí odkaz: https://doaj.org/article/ce721c4f7f474c15bab57e1fbb7f6813

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Akademický článek

Multi-source inventory of the forests of the Hebei Forestry Bureau, Heilongjiang, China

Autor: Tomppo, Erkki, Korhonen, Kari, Heikkinen, Juha, Yli-Kojola, Hannu

Publikováno v: Silva Fennica, Vol 35, Iss 3 (2001)

A multi-source forest inventory method is applied to the estimation of forest resources in the area of the Hebei Forest Bureau in Heilongjiang province in North-East China. A stratified systematic cluster sampling design was utilised in field measure

Externí odkaz: https://doaj.org/article/fd2b85f8f0c54fe88d02c735d3c4d265

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