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Selected technical parameters of juvenile wood in Scots pine (Pinus sylvestris L.) – variation between social classes of tree position in the dominant stand

100%

Tomczak A.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2013

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tom 12

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nr 4

The study compared basic density, compressive strength along the grain, static bending strength and modulus of elasticity of juvenile wood in pines from different Kraft’s classes. Analyses were conducted in 8 mature pine monocultures in north-western Poland. In each experimental site a total of 9 trees were selected, thus the analyses were conducted on 72 model trees (with 24 for each social class of tree position in the stand). The highest values of analysed technical parameters were recorded for wood of co-dominant trees, the lowest were found for predominant trees, while intermediate values were recorded for wood of dominant trees. All the reported differences were statistically significant. Similar dependencies were observed when comparing wood from different sections of stems, with the greatest disproportions, frequently statistically significant, found in their lower sections.

2

Effect of a rootstock and tree location on yield and fruit quality of King Jonagold apples

100%

Bielicki P., Czynczyk A., Chlebowska D.

Journal of Fruit and Ornamental Plant Research

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2000

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tom 08

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nr 2

3

Pod ziemniaki na wczesny zbior

80%

Marchewka T.

Agrochemia

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1995

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nr 09

23

4

Allometric models of foliage biomass in Scots pine (Pinus sylvestris L.)

80%

Jelonek T., Pazdrowski W., Walkowiak R., Arasimowicz-Jelonek M., Tomczak A.

Polish Journal of Environmental Studies

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2011

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tom 20

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nr 2

Presented analyses were connected with modelling foliage biomass of Scots pine (Pinus sylvestris L.) growing in northern and western Poland. In order to realize the study, a total of 38 one-hectare experimental plots were established in commercial pine monocultures growing on sites optimal for this species at a given geographical location. A total of 114 trees aged 32-114 years were felled and their needle weight and the weight of needles and young, 1-year old twigs were measured. Since social variation in the stand could affect the fit of the model, for each social class of tree position an individual allometric equation was proposed, based on easily measurable biometric traits of trees. Analysis of stepwise backward regression was conducted in order to determine variables in these equations. It turned out that to estimate foliage biomass of predominant and dominant trees, it seems most appropriate to apply diameter at breast height and tree age. In turn, for co-dominant trees, apart from diameter at breast height and tree age, the model needs to include additionally tree height and crown length. Moreover, due to the fact that the dependence between needle weight and the weight of needles and young twigs is practically linear, prediction was conducted for the biomass of foliage with young twigs. From the practical point of view, this makes it possible to precisely determine needle biomass on the basis of the weight of needles with young, 1-year-old shoots.

5

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Lobelia jeziorna (Lobelia dortmanna L.) w jeziorach Tucholskiego Parku Narodowego i Nadleśnictwa Kościerzyna

80%

Nawrocka-Grzeskowiak U., Frydel K.

Zarządzanie Ochroną Przyrody w Lasach

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2015

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tom 09

Lobelia jeziorna (Lobelia dortmanna L.) w Polsce jest gatunkiem objętym całkowitą ochroną gatunkową. Występuje jedynie w północnej części kraju na Pojezierzu Pomorskim i w kilku odizolowanych stanowiskach. Obserwacje występowania lobelii jeziornej prowadzono na terenie Borów Tucholskich w Parku Narodowym Bory Tucholskie, Nadleśnictwach Kaliska i Kościerzyna. W wyniku rozpoznania terenowego, analizy dostępnej dokumentacji stwierdzono występowanie tej rośliny w jeziorze Wielkie Krzywce oraz dwa stanowiska na obszarze 40 tys. hektarów lasu – Jeziora: Małe i Wielkie Oczko. Najliczniej lobelia występuje w Jeziorze Małe Oczko, gdzie można ją spotkać w kilku miejscach. Zagrożeniem dla tego gatunku będą: zarastanie brzegów, zmiana składu wód oraz turystyka.

6

Axial and radial variation in the proportions of sapwood and heartwood in stems of common oak [Quercus robur L.] depending on site type, age class and social class of tree position

80%

Szymanski M., Pazdrowski W., Kazmierczak K., Manka K., Nawrot M.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2008

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tom 07

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nr 2

45-58

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Proton transfer reaction mass spectrometry approach to monitor monoterpenes emission from Aleppo pine (Pinus halepensis) woods growing in different locations

80%

Sandak J., Sandak A., Boschetti A., Dimauro M., Negri M.

Folia Forestalia Polonica. Series B - Drzewnictwo

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2010

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tom 41

8

Cyclical wood heterogeneity of Norway spruce Picea abies (L) Karst. on stem profiles of trees from different social positions in stands of age class IV

80%

Giefing D. F., Pazdrowski W., Jelonek T., Tomczak A., Kupczyk G.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2008

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tom 11

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nr 1

9

Zasady uprawy lnu oleistego

61%

Walkowski T.

Agrochemia

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1995

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nr 04

14-15

10

Chwasty - grozny konkurent rzepaku

61%

Bakuniak E., Ziminska Z.

Agrochemia

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1995

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nr 07

9-10

11

Gospodarskie rady

51%

jan

Agrochemia

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1996

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nr 10

Ograniczanie wyników

Selected technical parameters of juvenile wood in Scots pine (Pinus sylvestris L.) – variation between social classes of tree position in the dominant stand

Effect of a rootstock and tree location on yield and fruit quality of King Jonagold apples

Pod ziemniaki na wczesny zbior

Allometric models of foliage biomass in Scots pine (Pinus sylvestris L.)

Lobelia jeziorna (Lobelia dortmanna L.) w jeziorach Tucholskiego Parku Narodowego i Nadleśnictwa Kościerzyna

Axial and radial variation in the proportions of sapwood and heartwood in stems of common oak [Quercus robur L.] depending on site type, age class and social class of tree position

Proton transfer reaction mass spectrometry approach to monitor monoterpenes emission from Aleppo pine (Pinus halepensis) woods growing in different locations

Cyclical wood heterogeneity of Norway spruce Picea abies (L) Karst. on stem profiles of trees from different social positions in stands of age class IV

Zasady uprawy lnu oleistego

Chwasty - grozny konkurent rzepaku

Gospodarskie rady