Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2019 (vol. 67), issue 3
Three-Dimensions Modelling of a Jet Pile Construction in the Karolinka Dam
Somia Bredy, Jan Jandora
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 637-648 | DOI: 10.11118/actaun201967030637 
Karolinka Earth Fill dam was built on the Stanovnice river above the town of Karolinka in the region of Vsetín. Because of leakage on the downstream dam face due to bad compacting of soil during the construction stage, the reservoir was used to a limited level. There were some steps to improve safety which had been developed to reconstruct the dam after extensive surveys in 2005. The major rehabilitation was commenced in period from September 2012 till October 2013, included the remediation of central impervious core in the dam by using the diaphragm wall (I also have worked on) and jet grouting pile from self-hardening cement-bentonite suspension....
Failure Mechanism and Mechanical Characteristics of NiCrBSi Coating
Martin Buchtík, Matěj Březina, Ondřej Vyklický, Jan Filipenský, Jaromír Wasserbauer
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 649-657 | DOI: 10.11118/actaun201967030649
Mechanical properties of NiCrBSi coatings on plain carbon steel substrate prepared by HVOF (High velocity flame spraying) were studied in this work. Sprayed coatings with average thicknesses of 0.25 mm, 0.5 mm and 1 mm were prepared on preheated steel strips and steel strips without preheating. Chemical analysis of the coatings cross-section offered information about material structure and distribution of chemical elements within the coating. Hardness of the coating was measured with the aim to reveal the influence of coating thickness and coated substrate preheating on coating hardness. Similar hardness was observed regardless coating preparation...
Assessment of the Electricity Production from Renewable Energy Sources in Selected Countries of the European Union in 2010 and in 2016 Using Multidimensional Exploratory Techniques
Tomasz K. Dobek, Marek Rynkiewicz
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 659-666 | DOI: 10.11118/actaun201967030659
The study presents assessment of the production of electricity obtained from renewable sources in selected European Union countries in 2010 and 2016. Among selected countries, the largest amount of electricity from renewable sources in 2010 was produced in Germany - 9,546.56 ktoe and in 2016 - 16,409.73 ktoe. In the analyzed countries of the European Union there was an increase in the production of energy obtained from renewable sources in comparison to 2010 and the dynamics of this growth in selected countries ranged from 106.1% to 217.0%. On the basis of the cluster analysis, it was found that Poland was in a similar group as Hungary in obtaining...
Host Plant Selection in Phyllonorycter Species Living on Willows and Their Hybrids (Lepidoptera: Gracillariidae)
František Gregor, Hana Šefrová, Aleš Laštůvka, Zdeněk Laštůvka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 667-678 | DOI: 10.11118/actaun201967030667
Own knowledge on host plants and on the breadth of the trophic specialization of central European species of Phyllonorycter Hübner, 1822 living on Salix spp. obtained over the past 60 years are presented. A total of 8 species were evaluated and divided into four groups after their trophic relationships; monophagous species: Phyllonorycter quinqueguttella (Stainton, 1851) on Salix repens s. l., and P. viminetorum (Stainton, 1854) on Salix viminalis (here only provisorly due to the small number of reared specimens); narrowly oligophagous species: P. dubitella (Herrich-Schäffer, 1855) and P. salicicolella...
Relationship Between Phenological and Meteorological Data as an Important Input Into Spring Barley Phenological Model
Lenka Hájková, Martin Možný, Věra Kožnarová, Lenka Bartošová, Zdeněk Žalud
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 679-688 | DOI: 10.11118/actaun201967030679
In this study, phenological and meteorological data have been used to interpret the relationship and influence of weather on current phenological stages of spring barley. The analyses were focused mainly on the stages closely connected with yield and grain filling period - tillering (BBCH 21), heading (BBCH 55) and yellow ripeness (BBCH 85). The aims of this paper were to: (1) calculate the trend in phenological development of spring barley from CHMI phenological stations in period 1991-2012 at different climatic zones; (2) evaluate the trend in number of days between phenological stages; (3) evaluate the sums of growing degree days above threshold...
The Impact of Storage on Phthalic Acid Esters Concentrations in Yogurts Packed in Plastic Cups
Marcela Jandlová, Vojtěch Kumbár, Alžbeta Jarošová, Markéta Stará, Roman Pytel, Šárka Nedomová, Sylvie Ondrušíková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 689-693 | DOI: 10.11118/actaun201967030689
Phthalic acid esters are used as plastic softeners and also can be found in food packaging materials. European legislation defines specific migration limits of plastic additives for plastic materials that come into contact with food. This study monitors the phthalic acid ester concentrations in yogurts after manufacturing and then after a 3-week storage. The studied yoghurts were natural yogurt with 1 % of chia flour, natural yogurt with 5 % of chia flour, natural yogurt with 1 % of bamboo fibre, natural yogurt with 5 % of bamboo fibre and natural yogurt. The analysed phthalic acid esters were dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate...
Comparison of Microbiological Parameters of Fresh Goat Cheeses Produced on Farms in the Czech Republic Using Conventional and Organic Farming Method
Libor Kalhotka, Jitka Přichystalová, Lenka Dostálová, Květoslava Šustová, Michaela Hůlová, Eva Burdová, Jan Kuchtík
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 695-704 | DOI: 10.11118/actaun201967030695
The paper deals with microbiological parameters of goat cheeses produced on two farms during several years. The first farm used conventional farming method with about 130 dairy goats and the second one applied organic farming method with approximately 500 dairy goats. In samples of fresh goat cheese taken in four years, there were determined the following groups of microorganisms: total count of microorganisms, lactic acid bacteria, coliform bacteria, psychrotrophic microorganisms, enterococci and micromycetes. The comparison of the average numbers of individual groups of microorganisms in cheeses showed a statistically significant difference between...
Evaluation of Czech Warm-Blood Stallions Based on Performance of Their Daughters
Barbora Kubištová, Iva Jiskrová, Zuzana Kubíková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 705-710 | DOI: 10.11118/actaun201967030705
The objective of the present study was to assess the Czech warm-blood stallions based on results of basic performance tests of their daughters. We evaluated 1140 daughters of 51 fathers. On the basis of calculations we eliminated the following effects: year of the test, registration of the mare in the appropriate section of the Stud Book and group of commissioners. Data were evaluated using the GLM procedure and included the effect of the stallion, year of the performance test of the mares and filing in the respective section of the Stud Book. We discovered that the impact of all three effects was statistically significant. The effect of the stallion...
First Experience with Ozone Used in Fruit Tree Storage
Luděk Laňar, Bronislava Hortová, Pavlína Jaklová, Michal Skalský, Jana Ouředníčková, Klára Kyselová, Martin Mészáros, Patrik Čonka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 711-721 | DOI: 10.11118/actaun201967030711
In the present study we investigated the possibility to use air ozone in fruit tree storage. The variables were: rate of ozonization, length of exposure to ozonized air and storage temperature. We assessed the impact of ozone on the vitality of the trees or bench grafted rootstocks, any changes appearing after storage and the feasibility of this technique under real conditions. Supplementary research was done to test the impact of ozonization on the potential occurrence of microorganisms and pests on trees. Results showed that trees can withstand relatively high rates of ozonization except for peach which is the most sensitive fruit; all the ozonization...
Remote Infiltration Areas as a Main Source of Ground Water for Floodplain Forest Without Floods
Jitka Novotná, David Juřička, Marcela Burnog, Michaela Kotlánová, Jindřich Kynický
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 723-731 | DOI: 10.11118/actaun201967030723
This article brings new information about phenomenon of the growth of floodplain forest without influence of floods over 50 years. Floodplain forest and its hydrogeological regime are under detail research for 10 years and detail 10 years data from hydrogeological well is used in this study. The area of interest belongs to nature reserve Plackuv les what together with brook Satava represents a unique relic of a floodplain forest in the confluence area of the rivers Svratka and Jihlava in southern Moravia (South-Moravian Region). The damming of the channel of the river Svratka has caused the end of floods. Despite the anthropogenic regulations performed,...
Catenas of Grain Size and Chemical Forest Soil Properties in Outer Western Carpathians of the Czech Republic Characterized by Principal Component Analysis
Pavel Samec, Tomáš Mikita, Aleš Bajer
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 733-747 | DOI: 10.11118/actaun201967030733
More frequent occurence of hillwashes in altitudinal-differentiated landscapes causes changes of relationships among terrain, bedrock and soils. The aim of the study was to characterize catenas of the terrain-bedrock-soil relationships by PCA of forest soil properties generalized into 2 × 2 km grid in Outer Western Carpathians (OWC) of the Czech Republic. The spatial relationships of the soil catenas with terrain and rocks were verified by ANOVA. Typification of the catenas was carried out by frequencies in the presented terrain and bedrock types according to biogeographical division system. Base saturation, CaO and P2O5 divide...
Possibilities of Detecting Diesel Leaking Into Engine Oil with Fuel Sniffer
Marie Sejkorová, Petr Jilek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 749-755 | DOI: 10.11118/actaun201967030749
The paper presents the possibilities of detecting diesel fuel without rapeseed methyl ester (RME) in the concentration range of 0-9.54 wt% leaking into engine oil of SAE 15W-40 viscosity specifications using Spectro FDM Q600-Fuel Sniffer. The results are confronted with regard to the determination of the accuracy and precision of the repeatability of measuring diesel fuel in oil with this type of instrument. By expressing the linear dependence between the diesel concentration determined by Fuel Sniffer and the actual diesel concentration in engine oil of model samples, correlation R = 0.998 was obtained.From the point of view of verifying the accuracy...
Determination of Mechanical and Energetic Properties of Reed Canary Grass Pellets Production
Jiří Souček, Algirdas Jasinskas, Fanni Sillinger, Kornél Szalay
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 757-762 | DOI: 10.11118/actaun201967030757
Authors of the article are evaluating characteristics of half-operational experimental agro-pellets production. The problems of production and use of agro-pellets is the current issue. It's a way to apply part of the agricultural production in the market. It is also an opportunity to replace part of the fossil fuels and increase the share of renewables. But the use of phytomass is bringing many problems. First, it is important that the manufactured products will be succeeded on the raw materials market. Agro-pellets therefore must have characteristics that support their competitiveness and allow their classification. The advantage comes if the agro-pellets...
Potential of Blue-Grey Cattle Managed Under Organic Farming Conditions of Czechia
Renata Toušová, Jaromír Ducháček, Martin Ptáček, Matúš Gašparík
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 763-770 | DOI: 10.11118/actaun201967030763
The aim of this work was to evaluate growth potential of Blue-Grey cattle in Czech conditions as the compare its growth traits to initial population. Suitability of specific conditions was evaluated based on growth ability and daily weight gains (DWG). Tested breeds included Shorthorn, Galloway and their crossbred variation called Blue-Grey cattle. A total of 428 animals were evaluated over a period from 2010 until 2016. Birth weight, live weight at 120, 210 and 365 days of age was monitored for each animal. Also, DWG at 120, 210 and 365 days of age was part of the evaluation. Mixed model (SAS 9.3) was used for statistical evaluation. The influence...
Contribution to the Knowledge of Incidence, Development and Galls of the Bisexual Generation of Biorhiza pallida (Hymenoptera: Cynipidae)
Jaroslav Urban
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 771-785 | DOI: 10.11118/actaun201967030771
The research study deals with the occurrence, cecidogenesis and development of the bisexual generation of Biorhiza pallida in the Brno region. Galls were found most frequently on Quercus petraea and on Q. robur. At the end of the winter season, females deposited 2-290 (on average 83.6) eggs, mainly into the above average sized buds on last-year's shoots. Larvae came to age in May in the 3rd instar, in the extremely warm and dry growing period of 2015 already in the 2nd instar. Adult individuals were leaving galls from the end of May to the end of July. Females were 3-4.5 - times superior to males in numbers....
Vertical Distribution of Nutsedge (Cyperus spp. L.) and Bahiagrass (Paspalum notatum L.) Seed Bank in Rice Growth Cycle
Mohammad Yaghoubi Khanghahi, Hemmatollah Pirdashti, Mohsen Mohseni-Moghadam, Raheleh Roham
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 787-795 | DOI: 10.11118/actaun201967030787
Weed management in rice continues to be a major challenge to the success of rice growers in northern Iran. Field experiments were conducted at Sari Agricultural Sciences and Natural Resources University to investigate the spatial distribution of weed seeds in the rice growth cycle in 2010 and 2011. Transplanting was done on June 6 in both years. Samples for seedbank analysis were collected 10 days before transplanting and emerged weed density was determined on three different dates during the growing season. Results indicated that nutsedge (Cyperus spp) and bahiagrass (Paspalum notatum) were the two most abundant weed species. The vertical...
Modelling Elasticity of Non-Oil Tax Revenues to Oil Price Changes: is There U-Shaped Association? Evidence from Azerbaijan
Khatai Aliyev, Altay Ismayilov, Ilkin Gasimov
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 799-810 | DOI: 10.11118/actaun201967030799
Oil price changes has a great influence on the behaviour of firms in oil exporting countries which displays itself in amount of non-oil tax receipts of the state budget. Employing FMOLS, DOLS, and CCR cointegration methods for 2001Q1-2015Q4, the study aims to analyse how oil price changes affects non-oil tax revenues in Azerbaijan. Empirical results altogether provide strong scientific evidence that there is U-shaped causality from oil price changes to total non-oil tax revenues , corporate income tax receipts and labour income tax payments , and inverse U-shaped to non-oil VAT revenues of the state budget. Results show that firms face with the trade-off...
Are Partnerships Enhancing Tourism Destination Competitiveness?
Diana Kvasnová, Tomáš Gajdošík, Vanda Maráková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 811-821 | DOI: 10.11118/actaun201967030811
The competitiveness and networking in tourism destinations is a well discussed topic among tourism scholars. However, the influence of partnerships of destination stakeholders on tourism competitiveness is under-researched. This paper contributes to the recent debate on partnerships and tourism destination competitiveness, including the gargantuan compilations of competitiveness factors by Ritchie and Crouch (2003), or Dwyer and Kim (2003), by examining the link among these two variables. The central question underlying this paper is whether partnerships of private and public sector stakeholders contribute to the destination competitiveness. The analysis...
Discretionary Disclosure of Listed Non-Financial Firms in an Emerging Market: Evidence from Ghana
Abdul Mansulu, Daniel Anarfi
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 823-837 | DOI: 10.11118/actaun201967030823
The main objectives of this study are to measure the extent of voluntary disclosure of listed non-financial firms in Ghana. The paper also seeks to identify the corporate governance attributes that influence voluntary disclosure, and finally, it rated the importance of voluntary items in the annual reports from the viewpoint of investors in Ghana. The paper makes use of 2013 to 2016 annual reports for 17 firms. The corporate governance attributes examined are board size, the proportion of independent non-executive directors on the board, blockholder ownership and the audit committee. Five control variables were also used to support the study. We developed...
Comparison of Tax Burden on Farms in Selected US States
Lukáš Moravec, Jana Hinke, Gabriela Kukalová, Adéla Šlapáková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 839-851 | DOI: 10.11118/actaun201967030839
This paper deals with the comparison of the tax burden of selected US States within the framework of two taxes - income tax and sales tax. When drawing up this issue, the authors were led by the idea that there may be significant differences among particular states, so they chose as the objective to identify fiscally attractive areas. The quantification research of tax burden on model farms in 12 US states - Corn Belt was carried out in order to meet the objective. To the three groups of taxpayers (single, married and head of household) were applied federal and state taxation on natural persons income, social security and health insurance contributions,...
The Effects of Capital Structure on Banks' Performance, the Ugandan Perspective
Isah Serwadda
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 853-868 | DOI: 10.11118/actaun201967030853
The paper aims to investigate the effects of capital structure on banks' performance on Ugandan banks for a ten years period, 2006-2015 with a sample of 20 commercial banks. The study employs four performance indicators of return on equity, return on assets, net interest margin and cost to income ratio to determine bank performance. Panel regression models are used to determine the effects of capital structure on bank performance. Independent variables are sub-divided into capital structure variables namely; long-term debt to total assets, short-term debt to total assets and total debt ratio and then control variables are bank size and tangibility...
On Measuring Countries' Innovation Performance: Organisational Level Perspective
Eva Švandová, Michal Jirásek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 871-881 | DOI: 10.11118/actaun201967030871
Innovation performance of countries is an important input for the governmental policy-making. However, currently popular rankings such as Eurostat's Summary Innovation Index instil one-approach-fits-all perspective by clearly specifying success conditions without considering contingency factors that make each country's situation unique. Our aim is to contrast current approach for innovation performance measurement on both country and organisational levels. We believe that the organisational level perspective can offer an inspiration for a change in the country level indicators themselves. Our study raises several concerns about the current state of...
VAT Collection Methods
Hana Zídková, Aneta Šťastná
Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(3), 883-895 | DOI: 10.11118/actaun201967030883
Although, the VAT contributes significantly to tax revenues in all EU Member States, the current VAT system is vulnerable to organized fraud schemes and suffers from large scale tax evasion. The EU Member States and the European Commission are discussing new ways of VAT collection to prevent the evasive and fraudulent practices. This paper aims at the description of different VAT collection methods including their flaws and benefits that are addressed in the available literature. The conclusion is that reverse charge and split payment method are changing the character of the VAT system. The One stop shop system is lacking trust of the EU member states....