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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

On Fisher-type inequalities for designs on regular graphs

100%
Mielniczuk J.
Colloquium Biometricum
|
2008
|
tom 38
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

On the Löwner ordering of C-matrices of BTIB designs

63%
Bronowicka-Mielniczuk U., Mielniczuk J.
Colloquium Biometricum
|
2014
|
tom 44
3

On circulant matrices: characterizations and applications

63%
Bronowicka-Mielniczuk U., Mielniczuk J.
Colloquium Biometryczne
|
2002
|
tom 32
4

On some property of cyclic designs related to crop rotation experiments

51%
Przybysz T., Bronowicka-Mielniczuk U., Mielniczuk J.
Colloquium Biometryczne
|
1999
|
tom 29
5

Efficiency factors for crop rotation designs

51%
Przybysz T., Bronowicka-Mielniczuk U., Mielniczuk J.
Colloquium Biometryczne
|
1998
|
tom 28
6
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Content available

Habitat conditions of the endangered species Salix myrtilloides in Eastern Poland

51%
Serafin A., Pogorzelec M., Banach B., Mielniczuk J.
Dendrobiology
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2015
|
tom 73
Changes in habitat conditions in the area of Eastern Poland (Polesie Podlaskie), often associated with anthropopressure, cause a reduction in the number of locations and population size of valuable and rare bog plant species, including a Pleistocene boreal relict, Salix myrtilloides. The aim of this study was to determine the current conditions of occurrence of this species based on the physico-chemical parameters of peatland piezometric groundwater. The results confirm the declining trend in the number of locations and abundance of this species in the past few decades, but at the same time they confirm the wide range of amplitude of the many investigated factors. Among the groundwater parameters studied, the low level of nitrogen fractions, phosphorus fractions, cations, and DOC can be considered to be a set of conditions promoting the preservation of the Salix myrtilloides population. The higher concentrations of phosphates, sulfates, Na, Ca, and Mg as well as higher pH and electrolytic conductivity can be considered to be presumably unfavorable. The lack of significant differences in the values of the piezometric water factors investigated for the sites with different population sizes of the studied species requires the identification of other limiting factors and the implementation of programs for its active protection in Poland.
7

Efektywność układów doświadczeń płodozmianowych o równej liczbie replikacji

51%
Przybysz T., Bronowicka-Mielniczuk U., Mielniczuk J.
Colloquium Biometryczne
|
1997
|
tom 27
8

Soil carbon accumulation as affected by tillage and crop systems in Southern Brazil

51%
Mielniczuk J., Bayer C., Amado T. J. C., Fernandes S. B. V.
Bibliotheca Fragmenta Agronomica
|
1997
|
tom 2B
9
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Physico-chemical groundwater conditions at Salix lapponum stands in Eastern Poland

45%
Serafin A., Pogorzelec M., Banach B., Szczurowska A., Mielniczuk J.
Dendrobiology
|
2015
|
tom 73
A subarctic-boreal relict species, Salix lapponum, found within the area of the Łęczna-Włodawa Lakeland (Eastern Poland), is particularly threatened with extinction due to the southern limit of its range and the specific conditions of its occurrence. This conclusion is evidenced by a systematic reduction in the number of its locations, which is accompanied by a decrease in the numbers of individuals making up its populations. The aim of the present study was to determine habitat conditions of the occurrence of Salix lapponum populations on the basis of an analysis of physico-chemical factors of groundwater at the sites associated with various stages of succession taking place in small peatland water bodies. The results of this study confirm the trend that the stands and population numbers of this species are decreasing with the intensification of ecological succession and the degree of its progress and at the same time show that this species exhibits a wide amplitude of many of the investigated factors. Among the groundwater parameters under investigation, the low level of total nitrogen, phosphorus fraction and DOC as well as the high level of Ca, pH and electrolytic conductivity can be considered to be a set of conditions that promote the maintenance of Salix lapponum populations. On the other hand, in the case of nitrates, nitrites, sulphates as well as the Na, K and Mg ions, the Kruskal-Wallis statistical test showed that the distribution of their values was invariant in relation to the studied habitats, which is probably evidence that they do not determine the development or extinction of the investigated populations in these habitats.
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