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Soils and chemical cycling of elements after land use changes (case studies)

100%

Harasimiuk A. , Mikulska M.

Miscellanea Geographica. Regional Studies on Development

2008

tom 13

145-151

The process of abandonment of arable land seems to be one of the main factors of changes in landscape and soil properties. This problem occurs on nearly 10% of arable land in Poland. The natural aspect of transformation is connected with the entrance of birch trees on uncultivated land and the anthropogenic aspect is associated with pine plantations. In the beginning, the appearance of trees on the former arable land changes soil properties because soil (and plant) is the most dependent component of the natural environment. In this paper, the role of birch and pine was analysed in comparison to arable land, abandoned land without trees and birch tree communities of different age. After the entrance of birch trees, soil profiles were enriched in nitrogen and elements such as aluminium, iron, cadmium, lead, cobalt, zinc, which were moved from the sod horizon of soil or come from the atmospheric load and were accumulated in litter or the humus horizon. Compared to arable land, some elements, e.g. calcium had lower concentration under birch trees. In comparison to cultivated land, birch and pine trees made the soil environment more natural, as expressed in the chemical properties of soil.

An Estimation of Soil Erosion Rate Hot Spots by Integrated USLE and GIS Methods: a Case Study of the Ghiss Dam and Basin in Northeastern Morocco

88%

Taher M. , Mourabit T. , Bourjila A. , Saadi O. , Errahmouni A. , El Marzkioui F. , El Mousaoui M.

tom Vol. 16, no. 2

95--110

Soil erosion is a major factor leading to dams’ siltation and reducing their storage capacity. This study mapped the hot spots of soil erosion areas to predict the soil erosion/siltation in the Ghiss basin/dam (northeastern Morocco). In this context, various data has been prepared in the geographical information system for the estimation of soil erosion by integrating the universal soil loss equation (USLE). The result of this study revealed that soil loss rate ranges between 0 and 19 t∙ha−1∙yr−1. Therefore, the hot spots in the soil erosion area are to be found upstream, potentially leading to dam siltation over time. To avoid Ghiss dam siltation, we suggest terrace farming and reforestation in the soil erosion area hot spots.

Growth of trees used in reforestation of a Northern slope of the external spoil bank of the "Belchatow" Brown Coal Mine

63%

Pajak M. , Forgiel M. , Krzaklewski W.

nr 2

Growth and development of Polish provenances of Picea abies in the IUFRO 1972 experiment

51%

Matras J.

2009

tom 61 Supplement

The paper presents the results of research on the genetic variability in the growth characteristics and plasticity of Polish provenances of Norway spruce, tested on thirty plots established in Europe and Canada in the IUFRO 1972 provenance experiment. Special consideration was devoted to the plots in Poland, especially in Knyszyn. The variability in the growth and quality characteristics of the provenances, found at experiment level, is high (within 6.099 standard deviation units). At provenance level, it ranges between 4.674 for Kartuzy and 2.192 for Rycerka Zwardoń. This indicates that the performance of the provenances depends much on environmental conditions. Although no provenance can be considered adaptable to any conditions thatmay occur in the cultivation of spruce, the Istebna Bukowiec and Zwierzyniec Lubelski provenances, having a very high breeding value and high plasticity, may be recommended for a wider use in reforestation.

Mites of the order Mesostigmata on plots reforested with Scots pine after various kinds of soil preparation and wood residue utilization after clear-cutting

51%

Skorupski M. , Gornowicz R. , Spaeth M. , Wierzbicka A.

nr 1