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Results 421 to 450 of 638:

Evaluation of harvest losses within a full mechanised grape harvest

Pavel Novák, Patrik Burg

Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(3), 751-756 | DOI: 10.11118/actaun201361030751

Trace metal contamination of the Dyje River stretch between Znojmo and Nové Mlýny, Czech Republic

Tomáš Vítek, Josef Hedbávný, Jan Mareš, Petr Spurný

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(3), 217-224 | DOI: 10.11118/actaun201260030217

Analysis of sound data streamed over the network

Jiří Fejfar, Jiří Šťastný, Martin Pokorný, Jiří Balej, Petr Zach

Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(7), 2105-2110 | DOI: 10.11118/actaun201361072105

Success factors of agricultural company

Helena Chládková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(4), 935-940 | DOI: 10.11118/actaun201361040935

The Response of Basal Area Increment in Old Sprout-origin Sessile Oak (Quercus petraea (Matt.) Liebl.) Trees During Their Conversion to a Coppice-with-standards

Zdeněk Adamec, Jan Kadavý, Michal Kneifl, Markéta Šplíchalová, Martin Klimánek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2014, 62(5), 837-847 | DOI: 10.11118/actaun201462050837

Vztahy mezi respirací, kvalitou humusu a kationtovou výměnnou kapacitou u vybraných subtypů černozemí jižní Moravy

Jiřina Foukalová, Ľubica Pospíšilová, Martin Janček

Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(1), 83-90 | DOI: 10.11118/actaun200856010083

Soil organic matter (SOM) undergoes short and long-term transformation in the soil. Microorganisms through their enzymes are able to mineralize organic carbon while the rate of this process is different. Biological test though referred to one of the main diagnostic methods for evaluating soil quality/health. The aim of our work was to determine basal respiration, total carbon content, fractional composition of humus and basic parameters of soil colloidal complex in selected subtypes of chernozem in South Moravia region. Basal respiration was measured using Vaisala GMT220 apparatus. Total carbon content was determined by oxidimetric titration and basic parameters of soil colloidal according to Mehlich. Results showed that production of carbon dioxide varied from 0.09 to 0.27 mg CO2/100g/h. Linear correlation between basal respiration and humification degree was found. Humus content varied from 2.15% to 4.6%. No correlation between quantity of humus and basal respiration was observed. Higher values of basal respiration were connected with higher quality of HS. Significant linear correlation between total carbon content (TOC) and cation exchange capacity (CEC) was found.

Factors affecting students' attitude towards introduction of tuition fees for higher education in the Czech Republic

Martina Zámková, Veronika Blašková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(7), 2939-2949 | DOI: 10.11118/actaun201361072939

HYDROBIOLOGICKÁ STUDIE ŘÍČKY BOBRAVY

Ivo Sukop

Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(2), 175-180 | DOI: 10.11118/actaun200856020175

The qualitative and quantitative composition of macrozoobenthos in the Bobrava rivulet was summarized utilizing former and recent studies. Altogether, 187 taxa of macrozoobenthos were determined in the Bobrava rivulet and its tributaries until now. The highest values of macrozoobenthos were found on the stony substrate with mean values of biomass and density corresponding to 18.7 g.m-2 and 2922 ind.m-2, respectively. Lower values were determined on the muddy and sandy substrates with 12.4 g.m-2 and 1587 ind.m-2, and 4.2 g.m-2 and 531 ind.m-2, respectively. The index of saprobity upstream the town Rosice corresponded to oligo-betamesosaprobity. Downstream the towns of Rosice, Omice and Radostice on the middle course of the Bobrava rivulet, water duality declined to beta - to alphamesosaprobity. Due to the self-purification ability of the stream, its water quality was improved to beta-mesosaprobity bellow the municipal pollution sources in the river stretch between localities Závist and Želešice.

Effect of season and herd on rennet coagulation time and other parameters of milk technological quality in Holstein dairy cows

Gustav Chládek, Vladimír Čejna, Daniel Falta, Ladislav Máchal

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(5), 113-118 | DOI: 10.11118/actaun201159050113

Analysis of life quality indicators in the area of natural resources in chosen micro-regions in the Czech Republic

Jaroslav Jánský

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(4), 105-116 | DOI: 10.11118/actaun201159040105

SUBJEKTIVNÍ HODNOCENÍ VÝZNAMNOSTI VYBRANÝCH TYPOGRAFICKÝCH VLASTNOSTÍ MARKETINGOVÝCH MATERIÁLŮ

Petra Talandová, Jiří Rybička

Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(3), 211-222 | DOI: 10.11118/actaun200856030211

This paper concentrates on the problems of marketing materials quality evaluation and their formal aspect and also customers' marketing materials evaluation. This area has not been concentrated on very much and nor in the literature is described. The paper presents the results of our own research which queries how the customers subjectively perceive and evaluate the marketing materials. The emphasis was put on the materials quality i.e. on what materials are considered as quality materials by the customers and which attributes mainly influence the quality. The results were aggregated on the basis of customers' responses an also on the basis of practical examples evaluation which included intentional mistakes.
The subjects of the evaluation were marketing materials quality as a general feature, the attributes influencing the quality and marketing materials quality and company quality relation. Also the examples including mistakes were evaluated. According to the questioning results, the respondents' answers vary much. It is not possible to find unambiguously right or wrong marketing materials evaluation. This area will be developed in further research which will be concentrated mainly on the typographical aspects.
The aim of this paper is to delimit and to define the present situation through the research result examination, to define 'quality' and to describe the way how marketing materials are perceived by the customers.

Vyhodnocení některých ukazatelů pitné vody ve vybraných, různě hospodařících chovech dojnic v České republice

Václava Genčurová, Oto Hanuš, Libor Janů, Antonín Macek, Marcela Vyletělová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(4), 57-76 | DOI: 10.11118/actaun200856040057

The paper evaluates drinking water quality on selected dairy farms on the territory of the Czech Republic. The drinking water samples were collected in the farm milk storage rooms of 30 farms with subsequently made analyses. The pre - selected chemical and microbiological indicators were stated according to the regulation No. 252/2004 Coll. (pH, conductivity, chemical oxygen demand, colour, turbidity, Fe, ammonia ions, nitrites, nitrates, colony count growing at 36 °C, colony count growing at 22 °C, coliform bacteria, Escherichia coli, Ca, Mg, Na, K, Zn, Cu, Mn, Pb, Cr and Ni). The statistical evaluation was performed in the obtained data file and these data were compared with the limit values given by the regulation. The nitrate content ranged between 1 and 40.7 mg L-1 with an average of 15.6 mg L-1. The pH values varied from 5.71 to 8. The chloride concentration geometrical means was 7.57 mg L-1. The Ca average concentration 58.5 mg L-1 was in the middle of the recommended interval 40-80 mg L-1. The geometric means in Mg content was 7.9 mg L-1 being under the recommended value 20-30 mg L-1. The Cu, Pb, Cr and Ni limit values were not exceeded. The limit values in microbiological analyses were exceeded 18x in coliform bacteria, 10x in enterococci, 5x in Escherichia coli. The microbiological colonies growing at 36 °C exceeded limit 9x, those growing at 22 °C 5x.
Further, differences are compared between the organic and conventional farms, and between farms producing milk in different type of LFAs (less favourable areas) and farms not included in these areas. The difference found out between the chloride concentrations in organic (6.56 mg L-1) and conventional farms (18.2 mg L-1; p < 0.05) was statistically significant. Locality or altitude, where a given far is situated, were another classifying criterion. A significant dependence was only found out in nitrate content, which decreased (p < 0.05) with increasing altitude (the correlation coefficient value -0.39). It can correspond with the soil use decrease - a lesser fertilization intensity. Statistically significant differences were found out in hardness value as well as in Ca, Mg contents connected with that in all reference criterions. The hardness was clearly lower (1.13 mmol L-1) in organic farms as compared with concentration 2.27 mmol L-1 in conventional ones. It is, however, only a supplementary indicator according to the respective regulation. No statistical significance was found among microbiological finding values in any case.

Evolution of insurance company service quality survey, using self-learning neural network

Vladimír Konečný, Oldřich Trenz, Dana Dvořáková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(2), 149-154 | DOI: 10.11118/actaun201159020149

VLIV VÝUKY NA VNÍMÁNÍ VYBRANÝCH TYPOGRAFICKÝCH VLASTNOSTÍ DOKUMENTŮ

Petra Talandová, Jiří Rybička

Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(6), 189-198 | DOI: 10.11118/actaun200856060189

This paper concentrates on the problems of documents quality evaluation and perception. It presents the results of our own research which was made at our faculty in last months. The research was aimed at marketing materials, their quality and their evaluation by customers. After another comparative research we have concentrated on the question of typography and its evaluation by customers. It has been proved that typography, although not very visible for many readers, does influence readers' evaluation of the whole document.
Quality evaluation is influenced by what readers usually see around them but also by what are they taught at schools. For that reason we should influence readers and teach them how should be documents designed. Future specialist should know about this problem.
Aim of the research was to find how typography influences readers and whether is the typographic quality evaluation influenced by teaching at school. We have been comparing two groups of respondents, of which one was influenced by typography education and one was not. Respondent were asked to fill in a questionnaire which concentrated on right and wrong characteristic of the text. Result analysis has proved that the group influenced by typography lessons had better results. These conclusions will be applied in the new education plan for an innovation of education courses.

Effect of selected factors on basic reproduction, growth and carcass traits and meat production in Texel sheep

Ladislav Štolc, Martin Ptáček, Luděk Stádník, Marek Lux

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(5), 247-252 | DOI: 10.11118/actaun201159050247

Columnar apple trees and their varieties

Libor Dokoupil, Vojtěch Řezníček

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(8), 37-48 | DOI: 10.11118/actaun201260080037

Evaluation of employee training in retail business

Jana Stehlíková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(2), 375-378 | DOI: 10.11118/actaun201260020375

Evaluation of viniculture and viticulture in the Czech Republic from the perspective of industry and prediction of development until 2020 according to selected variables

Zdeněk Hicl

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(7), 89-100 | DOI: 10.11118/actaun201260070089

Influence of ripening on the ethylene and carbon dioxide production during storage of plum fruits

Jarmila Kožíšková, Jana Goliáš

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(8), 133-140 | DOI: 10.11118/actaun201260080133

The relationship between inter-organizational trust and performance

Roman Fiala, Martin Prokop, Iva Živělová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(4), 89-98 | DOI: 10.11118/actaun201260040089

Analysis of distribution impact of subsidies within the Common Agricultural Policy on field production businesses in the Czech Republic

Gabriela Trnková, Z. Malá

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(7), 415-424 | DOI: 10.11118/actaun201260070415

The influence of changes to abiotic parameters on the fish assemblage structure of a lowland stream

Tomáš Vítek, R. Kopp, J. Mareš, T. Brabec, P. Spurný

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(3), 207-216 | DOI: 10.11118/actaun201260030207

The effect of clay amendment on substrate properties and growth of woody plants

Tomáš Meisl, Martin Dubský, František Šrámek, Tomáš Nečas

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(8), 163-170 | DOI: 10.11118/actaun201260080163

Development of mergers in the Czech Republic in 2001-2010

Eva Hýblová, Jaroslav Sedláček, Zuzana Křížová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(4), 133-140 | DOI: 10.11118/actaun201260040133

Vliv redukce listové plochy na výnos a kvalitu cukrovky (Beta vulgaris L. var. altissima Döll)

Radim Cerkal, Jan Dvořák, Karel Vejražka, Jiří Kamler

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 37-44 | DOI: 10.11118/actaun200755050037

The yield of sugar beet is directly affected by LAI (leaf area index) and values of LAD (leaf area duration). The integral leaf area plays, except for other factors, an important role during the damage or reduction of leaf apparatus. There are many sources of leaf damage: natural disasters (hailstorm), diseases, pests (including game browsing) etc. The intensity of the root production and quality differs in relation to the growth stage of the damage plant. The aim of this study was to evaluate the extent of losses in the root yield and the quality of sugar beet upon gradual reduction of the leaf area. Two diploid varieties Monza and Compact were used in the small-plot trials conducted in years 2004 to 2006 (in the experimental station Žabčice - maize production region, zone K2, average altitude 184 m, soil type was classified as gley fluvisoil, soil is medium heavy to heavy, clay-loam to loam type). The leaf area was manually reduced by 25% and 50% at BBCH 18-19 growth phase (8-9 leaves unfolded). The results were statistically evaluated by analysis of variance and testing by Tukey test (at the significance level α = 5%). Reduction of the leaf area was reflected on the decrease of the root yield by 1 to 10% depending on the year of harvest. In addition, the stressful state of the plants after defoliation resulted in the decrease of the yield of polarization sugar per hectare, namely by 0.45 to 1.66 t.ha-1. In 2005, the leaf area reduction caused a rise of the α-amino nitrogen content. The rise in the potassium and sodium cations content caused by the leaf area reduction also increased the sugar content in the treacle (by 0.1 to 0.16%). The increasing leaf area reduction lead to decreasing of yield of polarization sugar. However, this descent was statistically significant in harvest year 2006 only.

Textural properties of bread formulations based on buckwheat and rye flour

Petra Dvořáková, Iva Burešová, Stanislav Kráčmar

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(5), 61-68 | DOI: 10.11118/actaun201260050061

Digestate is equal or a better alternative to mineral fertilization of kohlrabi

Tomáš Lošák, Ludmila Musilová, Andrea Zatloukalová, Monika Szostková, Jaroslav Hlušek, Jiří Fryč, Tomáš Vítěz, Martin Haitl, Eduardo von Bennewitz, Anna Martensson

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(1), 91-96 | DOI: 10.11118/actaun201260010091

A study of potential output and output gap in the Czech Republic

Václav Adamec, Luboš Střelec

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(2), 9-16 | DOI: 10.11118/actaun201260020009

Analysis of inequality in the consumption of foodstuffs and beverages - the example of the Czech Republic

Zdeňka Malá, Gabriela Červená

Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(4), 255-266 | DOI: 10.11118/actaun201260040255

Vliv uhelných popelů na úroveň výnosu a kvalitu kukuřice. Část 1. Těžké kovy.

Jacek Antonkiewicz, Tomáš Lošák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 7-16 | DOI: 10.11118/actaun200755010007

The studies aimed at identification of various ash doses effect on the amount of yield and concentrations of Cr, Zn, Pb, Cu, Cd and Ni in maize. The studies were conducted as a pot experiment on mineral soil, to which ash doses of between 13.33 and 800.0 g∙pot-1 were supplied in proportions corresponding to quantities between 10 and 600 t∙ha-1. The amount of maize yield was diversified and depending on the treatment ranged between 35.59-121.64 g d.m.∙pot-1. Ash dose of 13.33 g.pot-1 significantly affected an increase in maize yield, while the dose over 26.67 g.pot-1 and equivalent to over 20 t.ha-1 applied to the soil markedly declined maize yield. Element concentrations in maize was diversified, depending on the treatment and plant part, and fluctuated from 0.32-3.48 mg Cr; 13.45-341.19 mg Zn; 0.50-5.02 mg Pb; 1.83-22.10 mg Cu; 0.02-1.71 mg Cd and 0.15-6.07 mg Ni∙kg-1d.m. It was found that with increasing ash dose Cr and Cu content increased systematically, whereas Zn, Pb, Cd and Ni concentrations in maize decreased. The content of investigated heavy metals in maize aboveground parts fulfilled the norms for good quality fodder. Under the influence of growing ash doses added to the soil a regularly declining Cr, Zn, Pb, Cd and Ni uptake by maize aboveground parts was observed.

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