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One of the reasons for emergency failures and poor sod formation on the grass sports fields can be found in poor seed ąuality of some species included in the mixtures. Moreover, contribution of individual components in the mixture often differs from the composition declared on the package. The studies carried out showed that out of 7 grass mixtures for the sports fields sodding, the share of seeds...
Analitical model of grundwater discharge in two layer medium has been considered. Formulas for drain discharge, pressure in the two layers and lowering of groundwater level have been found.
Field experiments were carried out in 2005 and 2006 at two localities: Lipnik near Stargard Szczeciński and Kruszyn Krajeński near Bydgoszcz. The experiments were designed by split-plot method in 3 replications. Two factors were considered: irrigation (control, sprinkler irrigation) and nitrogen fertilization (0, 40, 80 and 120 kg N ha-1). Yields of non-irrigated true millet grown on the soil of the...
The paper discusses at the beginning the term of thermal modernization, ways of its realization and causes of implementation in dwelling houses on rural areas. Those houses mostly do not fulfill current strict requirements on rational energy consumption. The most important cause of excessive heat consumption is mainly its loss through external components. The second part of the paper characterizes...
The paper deals with periodic composites which material structure is described by the anisotropic conductivity matrix invariant with respect to the pair of orthogonal translations such that the periodic cell determined by them coincides with the shape of chess-board cell. Moreover, it will be assumed that the material structure is invariant over the π /2-rotations with the symmetry axes of any chess-board...
This study aims to predict the sound transmission properties of composite layered beams structures with the system of dynamic vibration absorbers (DVA’s). The effective stiffness constants of equivalent to lamina Timoshenko beam and their damping properties have been determined by using a procedure based on refined numerical schemes and eigen-frequencies comparison. Numerical evaluations obtained...
The article presents studies concerning the influence of sodium chloride salinization on the germination of pepper, radish, in-ground and greenhouse tomato, butterhead lettuce, carrot and cucumber seeds. The studies revealed that an increased sodium chloride content had a negative effect on the germination ability of all tested plant species. An aqueous solution of NaCl characterized by a conductivity...
Reactivation of mass movements in the Warsaw slope, which resulted in a major construction failure of two buildings, indicate a need to update the geomorphologic analysis and evaluation of slope stability in that area. The area is located near the st. Orszady and st. Kiedacza and is at risk due to increase in the development intensity and the future localization of the Southern Beltway of Warsaw....
This study aims to predict the sound transmission properties of composite layered beams structures with the system of dynamic vibration absorbers (DVA’s). The effective stiffness constants of equivalent to lamina Timoshenko beam and their damping properties have been determined by using a procedure based on multi-level numerical schemes and eigen-frequencies comparison. The strategy of an anisotropic...
Streams of the Polish Carpathians are characterized by a high gradient as well as a great changeability of their volume and velocity of flow. The processes which take place in these streams are those connected with lateral, bottom and channel erosion. In order to reduce those types of erosion, various methods of channel regulation are used. In mountain streams these are mainly: river bars, drop hydraulic...
Streams of the Polish Carpathians are characterized by a high gradient as well as a great changeability of their volume and velocity of flow. The processes which take place in these streams are those connected with lateral, bottom and channel erosion. In order to reduce those types of erosion, various methods of channel regulation are used. In mountain streams these are mainly: river bars, drop hydraulic...
The article outlines the legislation concerning the methodology of estimating the value of works in Poland and the Czech Republic. In both countries it is necessary for the public investor to respect the law governing public procurement, which defines the structure of compulsory documents needed for the tender documentation, but not directly the way of their preparation. In both countries, though,...
The effects of two types of agricultural practice: (1) Variable Rate Application (VRA) and (2) uniform (UNI) N dose on selected chemical properties of soil were compared in a field fertilization experiment. Nitrogen, in doses 60 or 80 kgN.ha-1 (UNI), and 55-105 kgN.ha-1 (VRA) was applied to soil farmed with winter wheat (Triticum aestivum L.). The research was conducted in the 2012/2013 growing season...
The paper presents issues concerning former and contemporary wooden skeleton constructions. As the groundbreaking period between the historical and contemporary skeleton constructions, the World War II has been assumed. In the introduction, the constructions have been characterized basing on a literature review as well as direct investigations on selected Polish realizations. As one of originally...
The paper presents the results of research into the activity of alkaline and acid phosphatase, the content of available phosphorus, heavy metals and total organic carbon, against in soil with mineral fertilization only. The first experimental factor was phosphorus, potassium, magnesium, calcium and sulphur fertilization in six fertilizer combinations: 1: (PKMgCaS), 2: (KMgCaS), 3: (PMgCaS), 4: (PKCaS),...
The problem of underestimating or overestimating the aerosols loading over Kano is readily becoming a global challenge. Recent health outcomes from an extensive effect of aerosols pollution has started manifesting in Kano. The aim of the research is to estimate the aerosols loading and retention over Kano. Thirteen years aerosol optical depth (AOD) data was obtained from the Multi-angle imaging spectroradiometer...
An irrevocable effect of the process of tillage erosion is truncation of the surface horizon and the translocation and accumulation of the eroded soil material at the foot of the slope. It concerns mostly fine soil fractions, humus and nutrients (C, N, P). The rate of that process depends on the original morphology of soil profiles and the susceptibility to erosion, the amount and intensity of precipitation,...
In this study the performance of GEM-LAM numerical weather forecast focused on phenomena relevant to planning on-farm activities (i.e. frost and precipitation), is presented. Values from forecast were compared with observations gathered at 15 meteorological stations from Poland, for 1-year period. Based on data collected in contingency table, six verification scores were calculated. The results show...
The paper presents the test results of vertical strain versus logarithm time with the especially consideration of tertiary compression that is obvious in Polish peats. The consolidation models for soft organic soil, as peats, should also include the tertiary compression in the deformation process. The average values of times ta and tk for the transitions from primary to secondary and from secondary...
A number of definitions related to collaborative governance have been developed since early 2000. The common characteristics of collaborative governance are, among others, policy consensus, community visioning, consensus rule-making, and collaborative network structures. Collaborative planning is a new paradigm of planning for a complex contemporary society through which it encourages people to be...
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