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Jerzy Jonczak, Marek Degórski and Bogusława Kruczkowska

Abstract

The studies on quartz silt surface microstructures using scanning electron microscopy (SEM) were performed in Brunic Arenosol and Gleyic Ortsteinic Podzol, as major components of soil cover of the lower supra-flood terrace of the Słupia River, N Poland. Brunic Arenosols have developed from coarse- and medium-grained fluvioglacial sands, whereas Podzols from aeolian sands of mid-Holocene age, which in some places were covered with younger aeolian deposits. A group of at least 100 randomly selected grains from each soil horizon have been analyzed. The grains were classified into one of the following groups: fresh (type A), grains with the features of chemical weathering (type B), grains coated with scaly-grain incrustations (type C), grains coated with bulbous incrustations (type D), and cracked grains (type E). Parent materials of the investigated soils did not differ significantly in terms of contribution of grain types and type C predominated in both soils. Significant differences were noted in soil solums. Grains covered by scaly-grained incrustations predominated in Brunic Arenosol, which constituted 62–89%. In the profile of Gleyic Ortsteinic Podzol grains type B predominated in AE and E horizons (65–82%), whereas in the remaining horizons grains type C (54–77%).

Open access

Jerzy Bański, Marek Degórski, Tomasz Komornicki and Przemysław Śleszyński

Abstract

This main aim of this study is the examination and discussion of a conceptual and theoretical model for Poland’s areas of strategic intervention. Following a review of the current strategic documents at national and regional levels, it is possible to propose two basic categories of areas of strategic intervention: 1) growth areas (territories with natural or socioeconomic properties particularly favourable for development); and 2)problem areas (territories with unfavourable features and socioeconomic and/or natural processes). Among the problem areas it is possible to distinguish three main types: the social, the economic and the natural, albeit with the possibility of applying an even more detailed typology that allows for combinations of these types. Scientific findings can be combined with the results of empirical research to encourage the proposal of a new method of delimiting areas of strategic intervention. The identification of growth areas is primarily based on expert knowledge, which is clearly qualitative. In turn, the processes by which problem areas are delimited is quantitative in nature, reflecting analyses of selected diagnostic indicators that take social, economic and natural issues into account. The results which were obtained relate to the concept of endogenous development, as well as the assumptions under pinning policies of territorial cohesion.