In this paper I intend to defend Broome’s cognitivist view that reduces practical normativity to theoretical normativity, but argue that this leaves unaccounted for distinctively practical norms that I seek to capture as a system of local obligations to have particular intentions. The krasia requirement dictates what obligations we have relative to the normative beliefs that we have but does not tell us what intentions it is rational to have all-things-considered., V této práci zamýšlím obhájit Broomeův kognitivistický pohled, který redukuje praktickou normativnost na teoretickou normativitu, ale argumentuje tím, že tyto listy nezohledňují výrazně praktické normy, které se snažím zachytit jako systém místních povinností, které mají konkrétní záměry. Požadavek krasia diktuje, jaké povinnosti máme ve vztahu k normativním názorům, které máme, ale neříká nám, jaké úmysly je racionální mít všechny věci., and David Botting
The aim of this paper is to investigate the influence of COM (Cellular Organic Matter) produced by Microcystis aeruginosa on the process of water purification by destabilisation and subsequent aggregation of the impurity particles. The research was carried out with a raw water into which COM was added. The removal efficiency of the most significant components of COM, i.e. polysaccharides and proteins, was investigated. It was found that the removal efficiency of polysaccharides and proteins was dependent on the reaction conditions (pH, type of destabilisation reagent and its dosage). The removal efficiency of COM was relatively low. It was about 46% and 41% using ferric sulphate and aluminium sulphate aggregation, respectively. In comparison to the other organic components of COM, mainly polysaccharides, the proteins are removed with a higher efficiency. The GPC analyses of the residual COM showed that the proteins of higher molecular weight were aggregated with a higher efficiency. and Cílem práce je opis vlivu buněčných organických látek (COM) produkovaných sinicí Microcystis aeruginosa na proces úpravy vody pomocí destabilizace a následné agregace znečišťujících příměsí. Výzkum byl uskutečňován se syntetickou surovou vodou, do které byly přidány COM získané laboratorní kultivací M. aeruginosa. V průběhu laboratorních testů byla sledována především účinnost odstranění dvou základních složek COM, tj. polysacharidů a proteinů. Bylo zjištěno, že tato účinnost závisí především na reakčních podmínkách (typu a dávce destabilizačního činidla a pH). Účinnost odstranění COM byla poměrně nízká, maximální dosažená účinnost byla 46% při destabilizaci pomocí síranu železitého a 41% při použití síranu hlinitého. Bylo zjištěno, že s vyšší účinností jsou odstraňovány proteiny, obzvláště pak proteiny s vyšší molekulovou hmotností.
Results of the effect of subsidence of the Little Hungarian Plain on vertical movement of the riverbed and the downstream riverbed slope changes of the regulated flowchannel of Danube are presented. Subsidence of the flowchannel is also affected by the tectonic movements. The subsidence rate is attenuated by the andesitic Börzsöny and Visegrád Mountains since they function as natural barriers for the river. In the eastern vicinity of the Börzsöny and the Mátra, where the river flows in loose, unconsolidated sediments, the deepening of the flowchannel is considerable. and Príspevok prezentuje výsledky účinku poklesu Malej Uhorskej nížiny (geogr.) na vertikálny pohyb riečneho koryta a na zmeny pozdĺžneho sklonu upraveného koryta Dunaja. Pokles koryta toku je ovplyvnený aj tektonickými pohybmi. Intenzita poklesu je tlmená účinkom andezitovej línie horských celkov Börzsöny a Visegrád, ktoré pôsobia na rieku ako prírodné bariéry. Na východ od týchto horských celkov, kde rieka preteká cez voľnejšie uložené, nespevnené usadeniny, vyskytuje sa značné prehĺbenie riečneho koryta.
We established a multifactoral long-term field experiment at the Látókép experimental site of the University of Debrecen (Debrecen, Hungary), on mid-heavy calcareous chernozem soil in 1984, using experimental data from 17 years (1990-2008). We examined the extent to which soil fertility affects maize yield under natural conditions (without fertilisation). We analysed the effect of precipitation in the winter period (from the harvest of the previous crop (maize) until sowing (i.e. October-March)) and the growing season (i.e. April-September) on yield and we evaluated yield per FAO group. We examined the joint effect of crop year and hybrid maturity groups on maize yield; then we evaluated how hybrid maturity groups per crop year and wet and dry years per ripening group affected maize yield. It was shown that the pH value of soil significantly affected yield and also that there was a strong positive correlation between pH value and yield (r = 0.81) at a 1% significance level. The correlation between the two variables is described by a linear regression line. The slope shows that a 0.1 soil pH increase results in a 510 kg ha-1 maize yield increase on average. The correlation between the amount of precipitation during the growing season and maize yield is average, positive (r = 0.718) and linear. Based on the parameters of the estimated regression line - within non-fertilised conditions - 1 mm increase of precipitation resulted in a 9 kg ha-1 increase in yield. The analysis of the joint effect of hybrid maturity groups and crop year on yield showed that crop year determines standard deviation six times more than hybrid maturity groups, whereas the effect their interaction was not significant. and Práca bsahuje výsledky multifaktorového, dlhodobého pokusu na experimentálnej ploche Látókép, Univerzity v Debrecíne (Debrecen, Maďarsko). Experiment prebiehal od roku 1984, v tejto práci boli použité údaje z experimentu získané počas 17tich rokov (1990-2008). Pôda je stredne ťažká černozem. Bol skúmaný vplyv pôdnej úrodnosti na úrodu kukurice v prirodzených podmienkach, bez hnojenia. Študoval sa predovšetkým vplyv zrážok počas zimného obdobia (od zberu úrody kukurice až po nasledujúcu sejbu, t.j. od októbra do marca) a vplyv zrážok počas vegetačného obdobia (apríl -september) na úrodu kukurice. Okrem toho sa študoval vplyv ''sezóny'' a skupín skorosti hybridov na úrodu kukurice. Bolo vyhodnotený tiež vplyv skupiny skorosti hybridov počas suchých a mokrých rokov na úrodu kukurice. Bolo preukázané, že hodnota pH pôdy významne ovplyvňuje úrodu; súčiniteľ lineárnej korelácie medzi pH a úrodou na úrovni významnosti 1% bol r = 0,81. Z tejto korelácie vyplýva, že zvýšenie pH o 0,1 spôsobuje zvýšenie úrody kukurice priemerne o 510 kg ha-1. Korelácia medzi úrnom zrážok počas vegetačného obdobia kukurice a úrodou je pozitívna a lineárna (r = 0,718), z analýzy vyplýva, že zvýšenie úhrnu zrážok o 1 mm spôsobí priemerné zvýšenie úrody kukurice o 9 kg ha-1. Z výsledkov analýzy spoločného vplyvu skupín skorosti hybridov a sezóny vyplýva, že konkrétna sezóna ovplyvňuje tvorbu úrod 6-krát významnejšie, ako skupina skorosti hybridov; interakcia medzi skupinami skorosti hybridov a vlastnosťami sezóny nie je významná.
Soil water repellency causes at least temporal changes in the hydrological properties of a soil which result in, among other things, suboptimal growing conditions and increased irrigation requirements. Water repellency in soil is more widespread than previously thought and has been identified in many soil types under a wide array of climatic conditions worldwide. Consequences of soil water repellency include loss of wettability, increased runoff and preferential flow, reduced access to water for plants, reduced irrigation efficiency, increased requirement for water and other inputs, and increased potential for non-point source pollution. Research indicates that certain soil surfactants can be used to manage soil water repellency by modifying the flow dynamics of water and restoring soil wettability. This results in improved hydrological behavior of those soils. Consequently, the plant growth environment is also improved and significant water conservation is possible through more efficient functioning of the soil. and Vodoodpudivosť pôdy spôsobuje prinajmenšom dočasné zmeny v hydrologických vlastnostiach pôdy, ktoré okrem iného môžu viesť k suboptimálnym podmienkam rastu rastlín a k zvýšenej potrebe závlah. Vodoodpudivosť pôdy je rozšírenejší jav, ako sa pôvodne predpokladalo; bola identifikovaná v mnohých pôdnych typoch a klimatických podmienkach na celom svete. Dôsledkom vodoodpudivosti pôdy je strata zmáčavosti, zvýšený povrchový odtok a preferenčné prúdenie, znížená dostupnosť vody a iných vstupov pre rastliny, znížený účinok závlah, zvýšené požiadavky na vodu a iné vstupy, ako aj zvýšené riziko plošného znečistenia. Výskum naznačuje, že niektoré povrchovo aktívne látky (soil surfactants) môžu upraviť vodoodpudivosť pôdy obnovením omáčania a modifikáciou dynamiky vody. Výsledkom je zlepšenie hydrologických vlastností pôdy. Podobne, výsledkom je zlepšenie prostredia pre rast rastlín, zvýšenie retencie vody v pôde a teda aj efektívnejšia funkcia pôdy.
Different sustainable systems of husbandry on soil with various protective technologies are frequently studied. Direct sowing without ploughing is one of the alternatives. This article presents results of the effect of conventional tillage (CT) and no-tillage system (NT) on soil bulk density, soil porosity, maximum capillary capacity and available water capacity of Gleyic Fluvisol in conditions of the East-Slovakian Lowland. Observed years 1999 - 2005 from point of wiev of annual sum of precipitation are valued as dry till humid and of annual average air temperature as normal or warm. The effect of used agrotechnical arrangements was statistically highly significant (α = 0.01) for porosity changes and statistically significant for soil bulk density (α = 0.05). Non-significant effect was found for maximum capillary capacity and available water capacity. In the soil layer 0 - 0.3 m during years 1999 - 2005 soil bulk density increased about 22 kg m-3 (1.54 %) at no-tillage system in comparison to conventional tillage. At no-tillage system average values of porosity decreased about 1.32 %, maximum capillary capacity and available water capacity non-significantly decreased about 0.32 % in comparison to conventional tillage. and V trvalo udržateľných sústavách hospodárenia na pôde sa do popredia dostávajú rôzne ochranné technológie obrábania pôdy, medzi ktoré patrí aj priama sejba bez orby. Predkladaný príspevok sa zaoberá vplyvom konvenčnej agrotechniky (CT) a bezorbového systému (NT) na objemovú hmotnosť, pórovitosť, maximálnu kapilárnu kapacitu a využiteľnú vodnú kapacitu fluvizeme glejovej v podmienkach Východoslovenskej nížiny. Sledované roky 1999 - 2005 sú z hľadiska ročných zrážkových úhrnov hodnotené ako suché až vlhké a z hľadiska priemerných ročných teplôt vzduchu ako normálne, resp. teplé. Vplyv použitých systémov agrotechnických opatrení sa štatisticky významne (α = 0,01) prejavil pri pórovitosti, štatisticky na hranici významnosti (α = 0,05) pri objemovej hmotnosti a štatisticky nevýznamne pri maximálnej kapilárnej kapacite a využiteľnej vodnej kapacite. V porovnaní s konvenčnou agrotechnikou sa pri bezorbovom systéme zvýšili priemerné hodnoty objemovej hmotnosti vo vrstve pôdneho profilu do 0 - 0,3 m za roky 1999 - 2005 o 22 kg m-3 (1,54 %); priemerné hodnoty pórovitosti sa znížili o 1,32 %, hodnoty maximálnej kapilárnej kapacity a využiteľnej vodnej kapacity o 0,32 %.
The changes of runoff in the middle reaches of the Yellow River basin of China have received considerable attention owing to their sharply decline during recent decades. In this paper, the impacts of rainfall characteristics and land use and cover change on water yields in the Jingle sub-basin of the middle reaches of the Yellow River basin were investigated using a combination of statistical analysis and hydrological simulations. The Levenberg Marquardt and Analysis of Variance methods were used to construct multivariate, nonlinear, model equations between runoff coefficient and rainfall intensity and vegetation coverage. The land use changes from 1971 to 2017 were ascertained using transition matrix analysis. The impact of land use on water yields was estimated using the M-EIES hydrological model. The results show that the runoff during flood season (July to September) decreased significantly after 2000, whereas slightly decreasing trend was detected for precipitation. Furthermore, there were increase in short, intense, rainfall events after 2000 and this rainfall events were more conducive to flood generation. The “Grain for Green” project was carried out in 1999, and the land use in the middle reaches of the Yellow River improved significantly, which make the vegetation coverage (Vc) of the Jingle sub-basin increased by 13%. When Vc approaches 48%, the runoff coefficient decreased to the lowest, and the vegetation conditions have the greatest effect on reducing runoff. Both land use and climate can change the water yield in the basin, but for areas where land use has significantly improved, the impact of land use change on water yield plays a dominant role. The results acquired in this study provide a useful reference for water resources planning and soil and water conservation in the erodible areas of the middle reaches of the Yellow River basin.
In a previous study, the topsoil and root zone ASCAT satellite soil moisture data were implemented into three multi-objective calibration approaches of the TUW hydrological model in 209 Austrian catchments. This paper examines the model parametrization in those catchments, which in the validation of the dual-layer conceptual semi-distributed model showed improvement in the runoff simulation efficiency compared to the single objective runoff calibration. The runoff simulation efficiency of the three multi-objective approaches was separately considered. Inferences about the specific location and the physiographic properties of the catchments where the inclusion of ASCAT data proved beneficial were made. Improvements were primarily observed in the watersheds with lower slopes (median of the catchment slope less than 15 per cent) and a higher proportion of farming land use (median of the proportion of agricultural land above 20 per cent), as well as in catchments where the runoff is not significantly influenced by snowmelt and glacier runoff. Changes in the mean and variability of the field capacity parameter FC of the soil moisture regime were analysed. The values of FC decreased by 20 per cent on average. Consequently, the catchments’ water balance closure generally improved by the increase in catchment evapotranspiration during the validation period. Improvements in model efficiency could be attributed to better runoff simulation in the spring and autumn month. The findings refine recommendations regarding when hydrological modelling could consider satellite soil moisture data added to runoff signatures in calibration useful.
The experiments of stemflow of two semiarid shrubs (Caragana korshinskii and Hippophae rhamnoides) and its effect on soil water enhancement were conducted from 1st May to 30th September of 2009–2013 in the Chinese Loess Plateau. Stemflow values in C. korshinskii and H. rhamnoides averaged 6.7% and 2.4% of total rainfall. The rainfall threshold for stemflow generation was 0.5 and 2.5 mm for C. korshinskii and H. rhamnoides. When rainfall was less than 17.0 mm, the funnelling ratios were highly variable, however, stable funnelling ratios were found for rainfall greater than 17.0 mm for C. korshinskii. The funnelling ratios of H. rhamnoides first increased until a threshold value of 10.0 mm and then the funnelling ratios begin stabilize. The wetting front depths in the area around stem was 1.4–6.7 and 1.3–2.9 times deeper than area outside the canopy for C. korshinskii and H. rhamnoides. Soil moisture at soil depth 0–200 cm was 25.6% and 23.4% higher in soil around stem than that outside canopy for C. korshinskii and H. rhamnoides. The wetting front advanced to depths of 120 and 100 cm in the area around stem and to depths of 50 cm in the area outside the canopy for C. korshinskii and H. rhamnoides suggested that more rain water can be conserved into the deep soil layers through shrub stemflow. Soil moisture was enhanced in the area outside the shrub canopy, only when rainfall depth is > 4.7 and 5.1 mm, which is an effective rainfall for the area for C. korshinskii and H. rhamnoides. While for the area around stem of C. korshinskii and H. rhamnoides, the corresponding threshold values are 3.2 and 4.3 mm. These results confirmed that stemflow has a positive effect on soil moisture balance of the root zone and the enhancement in soil moisture of deeper soil layers.