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Field experiments with natural population of European corn borer (ECB) were conducted in three vegetation seasons (2012-2014) at Agricultural Institute in Osijek. The experiment was set up in a randomized block design as split-split plot method, with three repetitions. This plot has been constantly maize - soybean rotation for already 15 years. It was a 3x3x4 factorial experiment with three irrigation levels (A1- non-irrigated (only natural precipitation), A2-from 60% to 80% field water capacity - FWC and A3-from 80% to100% FWC), three nitrogen fertilizer levels (B1-0, B2-100 and B3-200 kg N/ha) and four different genotypes (C1-0SSK 596; C2-0SSK 617; C3-0SSK 602 and C4-0SSK 552).The aim of this study was to determine the effect of different levels of irrigation, nitrogen fertilization and genotypes on occurrence and damage of maize plants by the European corn borer larvae and relation between leaf feeding larvae with nitrogen and silicon concentration as well as C/N ratio. At the end of each growing season, ten maize plants from each variant were cut. Ear weight for each specific plant (g), tunnel length (cm), number of larvae in stalk, number of larvae in the ear shank, ear shank damage (cm) and total number of larvae in maize plantwere determined. In silking stage (middle of July) ten leaves (below the ear), from 10 maize plants were sampled on each variant. Nitrogen, carbon and silicon concentrations were determined in maize leaf (%) and C/N ratio calculated. In 2014, a significantly lower ECB attack was determined taking into account lower temperatures and higher amount of precipitate compared to the previous years. Dominance of Z-type European corn borer on pheromone traps in the area of eastern Slavonia was confirmed. Increasing the level of soil water content, damage from larvae was reduced and increasing the level of nitrogen fertilization feeding activity was increased. We have confirmed different hybrid resistance in regards to damage from larvae, so C4 (OSSK 552) genotype was the most resistant while C1 (OSSK 596) was the most susceptible. Concentration of nitrogen and silicon in a maize leaf was in negative correlation as well as nitrogen concentration and C/N ratio. Hybrid resistance didn't entirely depend on nitrogen and silicon concentrations, even though there was greater damage on most hybrids with higher concentration of nitrogen, while damage was reduced with higher concentration of silicon. © 2015, Faculty of Agriculture in Osijek. All rights Reserved. Source

Kusljic D.,Center for Monitoring Business Activities in the Energy Sector and Investments | Marenjak S.,Sveuciliste Josipa Jurja Strossmayera u Osijeku
Tehnicki Vjesnik | Year: 2012

Private Finance Initiative (PFI) is a model of Public Private Partnership (PPP) used to deliver public services which are not commercial in nature. Naturally, lients want to achieve successful PFI projects and they need to have a tool for evaluating the achieved success. Generally there are still no accepted frameworks for assessing project success but several recommendations for development of an evaluation template for assessing the success of PFI schemes exist. To enable success assessment there is a need to identify adequate success criteria. In this paper, important PFI project success criterion for lient called "Starting Date of Operation" will be identified. Model for its application on evaluating PFI project success will be recommended and its empirical applicability on suitable PFI projects in Croatia will be demonstrated. Descriptive statistics indicator will be calculated and referent base for success evaluation of PFI projects in Croatia applying "Starting Date of Operation" success criterion will be established. Source

Stober D.,Sveuciliste Josipa Jurja Strossmayera u Osijeku | Nagy I.,University of Novi Sad | Nagy I.,Hungarian Academy of Sciences
Tehnicki Vjesnik | Year: 2014

The first part of the paper gives an overview of research papers on the landscape with special emphasis on the visual and environmental studies. Long-time development of visual research landscape provides a basis for a critical review pointing to the need to increase the validity of visual research, the category selection, visual perspective of a landscape, as well as the technical characteristics of the performance of visual material. In this paper the results of research of attitudes of Hungarian and Croatian students, conducted through visual materials and questionnaires on river landscape transformation are interpreted. The results indicate the need for harmonization of cross-border categorizations of the observed landscape, as well as the complement of the objective parameters by the parameters which include cultural accumulation. Source

Stober D.,Sveuciliste Josipa Jurja Strossmayera u Osijeku | Pogacnik A.,University of Ljubljana | Loncar-Vickovic S.,Sveuciliste Josipa Jurja Strossmayera u Osijeku
Tehnicki Vjesnik | Year: 2012

River landscapes are perceived and preferred as a particular phenomenon of nature. Planning and management of river areas anticipate conflicts of various interest groups that are most commonly identified in researches as experts and non- experts (the public). The article presents the results of the comparison of student attitudes and those of experts for regional, cross-border area of Slovenia, Hungary and the Croatian landscape transformations on the Drava and the Mura rivers. The questionnaire, which consisted of visual and written parts, explored attitudes on the dimensions of the landscape, linkage with river scenery, views on the transformation of river landscapes and trust in the authorities responsible for planning and management of the river area. The results suggest a common positive platform of trust in a paradigm of sustainable management, and international border rivers management, but also indicate different sensitivity of the observed groups considering the transformation of river landscapes and trust in the authorities. Source

Miskulin M.,Sveuciliste Josipa Jurja Strossmayera u Osijeku | Mujkic A.,University of Zagreb | Miskulin I.,Sveuciliste Josipa Jurja Strossmayera u Osijeku
Paediatria Croatica | Year: 2015

Aim: To determine the frequency of baby walker use and the knowledge of parents of preschool children from the city of Osijek about baby walkers and to evaluate the interconnection between these variables as well as the interconnection between these variables and the level of parental education. Methods: This cross-sectional study was conducted using an anonymous questionnaire in May 2011 among parents of preschool children attending kindergartens in the city of Osijek. The questionnaire used in this study contained questions relating to age, gender and education level of parents, usage of baby walkers and knowledge of parents about this usage. The response rate was 38.4% (653/1700). Results: Among all the parents there were 63.1% (412/653) of those who used baby walkers. Parents with college or university education used baby walkers much less compared to parents with lower levels of education, and this difference was statistically significant (x2 = 45.093, df = 2, p Source

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