Silva Fennica
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Performance modelling in forest operations through partial least square regressionPartial Least Square (PLS) regression is a recent soft-modelling technique that generalizes and combines features from principal component analysis (PCA) and multiple regression. It is particularly useful when predicting one or more dependent variables from a large set of independent variables, often collinear. The authors compared the potential of PLS regression and ordinary linear reg... ...
Silva Fennica - Tập 46 Số 2
Forest damage caused by the Canadian beaver (Castor canadensis) in South Savo, Finland
Silva Fennica - Tập 33 Số 4
Crown condition as an indicator of the incidence of root rot caused by Heterobasidion annosum in Scots pine standsTrees in three Scots pine stands seriously infected by Heterobasidion annosum were classified according to their crown condition into four classes, from healthy to dead trees. After cutting the stands, the classification was compared with the symptoms of annosum root rot on stump surfaces (pitched area) and with the extension of decay in the roots of excavated stumps. When dead trees we... ...
Silva Fennica - Tập 36 Số 2
Resistance of Scots pine half-sib families to <i>Heterobasidion annosum</i> in progeny field trialsFive Scots pine ( L.) progeny field trials, each established in different Lithuanian regions of provenance in 1983, were studied. Each progeny field trial consists of 140 half-sib families from seven populations (20 families from each population). The evaluation was carried out in 2012 and 2018 to assess the families resistance to (Fr.) Bref. An index of resistance in the infected plots was... ...
Silva Fennica - Tập 54 Số 4
Regional energy wood logistics – optimizing local fuel supplyThe promotion of electric energy production from solid biomass by the Austrian government has lead to a boom in the construction of new combined heat and power plants. The current total demand for wood chips in the research area for energy purposes is 70 400 m of loose volume chips per year. The expected increase in demand due to these new plants is more than 4 times greater than curren... ...
Silva Fennica - Tập 43 Số 1
The effects of number of stems per stool on cutting productivity in coppiced <i>Eucalyptus</i> plantationsA time study was conducted to determine whether stem crowding had any impact on harvester productivity in stands. This represents an important element when trying to balance the advantages and disadvantages of coppice management in fast growing plantations designated for mechanized harvesting (i.e. machine felling, delimbing, debarking and cross-cutting). The study material consisted of 446... ...
Silva Fennica - Tập 50 Số 2
Needle chronologies on Pinus sylvestris in northern Estonia and southern FinlandA needle trace method was used to reveal the chronology of needle retention on Scots pine (Pinus sylvestris L.) in southern Finland (two stands) and northern Estonia (two stands). The average annual summer needle retention along the main stem varied from 2.2 to 3.1 in Estonian stands and between 3.4 and 4.2 in Finnish stands during the period 1966â1990. The 23-year-mean needle age was... ...
Silva Fennica - Tập 33 Số 3
Precommercial thinning in naturally regenerated Scots pine stands in northern Finland.
Silva Fennica - Tập 31 Số 4
Dynamic interactions between forest structure and fire behavior in boreal ecosystemsThis paper reviews and synthesizes literature on fire as a disturbance factor in boreal forests. Spatial and temporal variation in the biophysical environment, specifically, vegetative structure, terrain, and weather lead to variations in fire behavior. Changes in slope, aspect, elevation, and soil affect site energy and water budgets and the potential plant community. These terrain features... ...
Silva Fennica - Tập 36 Số 1
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