National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
COMPARISON OF ANALYTICAL METHODS FOR DETERMINING BASIC SOIL PARAMETERS COMPARISON OF ANALYTICAL METHODS FOR DETERMINING BASIC SOIL PARAMETERS
Nekutová, Tereza
T T ! T I T T T T T T T T t T t T T T T I Summary The methodsfor determinationof soil pH, exchangeableacidity (EA) and cation exchangecapacity (CEC) have been tested with respect to individual chemical parameters,particularly s/l ratio (soliďliquid), interactiontime,extractionreagentandsolutionseparationfrom a solid phase. Modification of s/l ratio influencesthe interfaceareq andthereforethe fractionof H* , EA and CEC increaseswhenthesolid concentrationin solutiondecreases. The interactiontime of soil with extractionreagentdoesn'thavea crucial influenceon pH, until it lasts over 4 hours.DeterminingEA, longerreactiontime inducedissolutionof silicatesand underestimate therealEA value.Longer interactiontime of CEC determinationcausescationredesorptionon thesoil particlessurfaceandcausesunderestimatingof theCEC. In determiningCEC methodby index ion displacementusingamoniumacetateaftersaltsrinse is not suitablefor acid soils.AdjustingpH of saturatingsolutionincreasesamountof EA, thatincreasesCEC valueandthatcausesanoverestimatingof results. The soil organiclayerextractscannotbetreatedusingstandardcentrifugation. For a future researchit would be necessaryto prepare an other referencematerial, than those accessibleatthepresenttime.
COMPARISON OF ANALYTICAL METHODS FOR DETERMINING BASIC SOIL PARAMETERS COMPARISON OF ANALYTICAL METHODS FOR DETERMINING BASIC SOIL PARAMETERS
Nekutová, Tereza
T T ! T I T T T T T T T T t T t T T T T I Summary The methodsfor determinationof soil pH, exchangeableacidity (EA) and cation exchangecapacity (CEC) have been tested with respect to individual chemical parameters,particularly s/l ratio (soliďliquid), interactiontime,extractionreagentandsolutionseparationfrom a solid phase. Modification of s/l ratio influencesthe interfaceareq andthereforethe fractionof H* , EA and CEC increaseswhenthesolid concentrationin solutiondecreases. The interactiontime of soil with extractionreagentdoesn'thavea crucial influenceon pH, until it lasts over 4 hours.DeterminingEA, longerreactiontime inducedissolutionof silicatesand underestimate therealEA value.Longer interactiontime of CEC determinationcausescationredesorptionon thesoil particlessurfaceandcausesunderestimatingof theCEC. In determiningCEC methodby index ion displacementusingamoniumacetateaftersaltsrinse is not suitablefor acid soils.AdjustingpH of saturatingsolutionincreasesamountof EA, thatincreasesCEC valueandthatcausesanoverestimatingof results. The soil organiclayerextractscannotbetreatedusingstandardcentrifugation. For a future researchit would be necessaryto prepare an other referencematerial, than those accessibleatthepresenttime.
Influence of selected Factors on the Performance of Workers
Nekutová, Tereza ; Hiršová, Miloslava (advisor) ; Bína, Vladislav (referee)
This thesis deals with impact of the chosen factors on the performance of employees. It describes performance itself, productivity and difference between them. It examines factors which can have impact on the performance. There are analyzed different ways of evaluation of working performance and productivity and examined possible ways of performance management. There is analyzed which factors have impact on performance in chosen organization where research was made, using logistic regression. There are presented results of research and analyzed impact in practice. Finally it suggests possible solution and recommendation for management of the organization.
Demographic Changes in the Czech Republic as a Social and Economic Problem
Nekutová, Tereza ; Kaczor, Pavel (advisor) ; Krbová, Jana (referee)
The bachelor thesis deals with the demographic changes in the Czech Republic and identifies social and economic problems, which these changes bring. The theoretical part of the thesis describes the demographic development of our country from 1950 to 2010; gives the forecast for the future - until 2065, outlines possible social and economic problems associated with demographic changes and possible solutions of these problems. The practical part, includes the survey, explores the willingness of present generation of young childless people to have children in the future, in which conditions, and whether significant change in the social benefits associated with parenthood would have had an effect on this decision.

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