Structural Elements and Morphological Characteristics of Pedunculate Oak (Quercus robur L.) in Young Even-Aged Stands of Spačva Forest

Background and Purpose: Croatian Forest Research Institute and Croatian Forests Ltd., Zagreb, have in 2010 jointly proposed a scientific experiment on permanent experimental plots called “The Impact of the Intensity of Silvicultural Tending on Pedunculate Oak Dieback”. The basis for setting up experimental plots were the results of the analysis of surface structure of pedunculate oak (Quercus robur L.) stands of Spačva Forest and its projection area for the next 140 years, and the related issues of regeneration of old and tending of young stands in conditions of increasing climate change. In the future this will present a major problem for forestry practice in silvicultural operations, both in terms of workers and materials. Materials and Methods: The experiment was conducted in the area of Forest Administration Vinkovci, Forest Office Vinkovci, Management Unit Kunjevci, in three subcompartments of different age (10, 15 and 20 years) where different intensities tending operations of cleaning were conducted. A total of 20 plots were established by using the already established network of silvicultural lines and paths, while the position was recorded by a GPS device. On each plot 30 pedunculate oak trees were permanently marked (600 trees in total). Tree selection was based on spatial and phenotypic criteria. Results: The initial measurement on permanent experimental plots shows unsatisfactory number of pedunculate oak trees along with the high number of common hornbeam trees. The overall basal area has a tendency of continuous growth in relation to the age of experimental plots. The value of crown length in relation to the total height of pedunculate oak trees is 74.3% in subcompartment 32A, 53.5% in subcompartment 34 A, and 54.3% in subcompartment 38A. Trunk length, i.e. trunk purity also increases with age; in subcompartment 32A on average it amounts to 1.35 m, in subcompartment 34A to 3.28 m and in subcompartment 38A to 4.85 m. Conclusion: After conducting periodic surveys of the established plots by the year 2020 enough data should be collected whose processing, analysis and interpretation would provide guidelines for improving the future management of young pedunculate oak stands

Communication Channel Preferences of Corn and Soybean Producers

The study reported here sought to identify the types of communication channels Iowa corn and soybean producers prefer for agricultural information. Data were gathered through focus groups and analyzed using theme coding and qualitative data charts. Conclusions included: 1) producers looked to Extension for assistance in evaluating information from other sources rather than acquiring information; 2) producers preferred a variety of communication channels; 3) producers highly preferred consultations highly; 4) producers preferred mass media channels for general information and interpersonal communication channels for specific and applicable information; 5) among mass media channels, producers preferred radio; and 6) among interpersonal channels, producers preferred consultations

Iowa Corn and Soybean Producers\u27 Use of Communication Channels

The purpose of this study was to determine the agricultural information preferences of corn and soybean producers in Iowa and the implications for agricultural Extension education. The specific objective of this report was to identify how Iowa producers use communication channels to obtain agricultural information. The results will help agricultural Extension educators and communicators make informed decisions regarding program delivery. The study collected data from corn and soybean producers in five focus groups held throughout Iowa. Focus group data were collected as audiotapes and transcriptions. Analysis was performed through theme coding and qualitative data charts. Study findings revealed that a) producers used a variety of communication channels to gather agricultural information, b) producers primarily used radio and consultations for gathering agricultural information, c) producers used mass media channels for general information and interpersonal communication channels for specific and applicable information, and d) producers looked to Extension for assistance in evaluating information gathered from other sources

Study of the Effects of Polypropylene Tree Shelters and Hydrophilic Polymers on Growth, Survival, Health and Physiological Condition of Pedunculate Oak Seedlings (Quercus robur L.)

This paper presents the results of eight years of scientific research on the effect of polypropylene shelters (Tully tubes) and hydrophilic polymers on growth, survival, health and physiological condition of pedunculate oak seedlings (Quercus robur L.). The experiment was established in 2014 on relative forest soil, on partially forested land in subcompartment 35a, forest management unit Kragujna, which is managed by the Forest Administration Vinkovci, Forest Office Županja. In the autumn of 2014, one-year-old bare-rooted pedunculate oak seedlings were planted as a randomized block design experiment - four blocks with four repetitions. Four types of planting were tested: seedlings without a polypropylene shelter, without the addition of Zeba hydrophilic polymer granules (S variant), seedlings without a polypropylene shelter, with the addition of Zeba hydrophilic polymer granules (SP variant), seedlings with a polypropylene shelter, without the addition of Zeba hydrophilic polymer granules (SS variant), and seedlings with a polypropylene shelter, with the addition of Zeba hydrophilic polymer granules (SSP variant). The experiment was established as a result of considering the long-term problem of difficulties in natural regeneration. Disturbances in natural regeneration are certainly caused by increasing climate changes (floods, long-term droughts, storms, hailstorms, etc.) and other unfavourable biotic and abiotic factors that cause a significant reduction in quantities and/or an almost complete absence of pedunculate oak acorn yield. Due to the aforementioned circumstances, in the very near future we will be forced to resort more often to different forms of artificial forest regeneration, such as regeneration by planting sheltered seedlings that are less exposed to risks and challenges during survival, and which have greater competitiveness in relation to other vegetation on the regeneration surface (higher growth). Nowadays, this method of regeneration is used mostly for filling in places where, for various reasons, natural regeneration has been unsuccessful on several occasions and over a long period of time, and/or where there are great difficulties in carrying out natural regeneration (floods, areas damaged by fires, game damages and competition of weeds). This paper presents the results of scientific research after five periodic measurements, i.e. after the first, second, fifth, sixth and eighth growing season. The results show that even after the eighth growing season, seedlings protected with a polypropylene shelter have greater survival rate and greater height growth than unprotected seedlings. The highest survival rate was found in seedlings protected with a polypropylene shelter, with the addition of Zeba hydrophilic polymer of 82.14% (SSP variant), while unprotected seedlings with the addition of Zeba hydrophilic polymer (SP variant) had the lowest survival rate of 62.63%. The highest growth was recorded on seedlings protected with a polypropylene shelter, with the addition of Zeba hydrophilic polymer (SSP variant) amounting to 202.75 cm, while on average the smallest seedlings were those without polypropylene shelter protection and without the addition of Zeba hydrophilic polymer (S variant), amounting to 129.02 cm

The Effect of Polypropylene Tree Shelters on Growth and Survival of Pedunculate Oak Seedlings (Quercus robur L.)

Background and Purpose: The declining and dieback of lowland oak forests as the result of global climate change, as well as the attack of various pathogenic organisms, industrial pollution, and other negative effects reduce acorn yield and will continue to do so in the future. As a result of this fact, the areas on which artificial regeneration will be applied by planting seedlings will have to be increased. The artificial regeneration process is more expensive than the natural one, so protection measures need to be applied to minimize the loss of young seedlings. Materials and Methods: Experimental plots were set up in the forest area of Spačva Basin. A completely randomized block design experiment in four repetitions was used, in which four variants of planting and protection of oak seedlings were examined. We tested polypropylene tree shelters and hydrophilic superabsorbent based on maize starch. Heights of the plants were measured by measuring tape, and survival was registered by numbering of dead and living plants. For statistical purposes, we have used analysis of variance (repeated measure ANOVA), which allows us to prove statistically significant difference between morphological traits of studied variants. Results: Two years after planting, the lowest level of survival was found in unprotected seedlings (79.5%), while tree shelters provided the best conditions for seedlings survival (88.75%). In the case with the hydrophilic granules Zeba the result is slightly worse. When analyzing average height in a particular case, significantly higher plants are recorded in cases where the polypropylene tree shelters are used. The average height, with tree shelters (128.27 cm), is more than three times higher than the unprotected seedlings (37.97 cm). The addition of hydrophilic granules did not show a statistically significant difference. In cases where the seedlings were not under the tree shelter protection, the effect of hydrophilic granules was also not statistically significant. Conclusions: Sheltering accelerated the height growth of the planted oaks substantially and also provided best conditions for seedlings survival. During the research period the usage of Zeba did not justify the purpose for which it was applied. Although the first results are promising in order to gain a complete insight into the potential of tree shelters it is necessary to record the changes and maintain the experiment for a further 2-3 years with quantification of other harmful factors that may appear (drought, game etc.) after which a more reliable judgment regarding their usefulness could be provided

Elections in digital times: a guide for electoral practitioners

Strengthening democracy and electoral processes in the era of social media and Artificial Intelligence Democracy requires free, periodic, transparent, and inclusive elections. Freedom of expression, freedom of the press, and the right to political participation are also critical to societies ruled by the respect of human rights. In today’s rapidly evolving digital environment, opportunities for communication between citizens, politicians and political parties are unprecedented –– with information related to elections flowing faster and easier than ever, coupled with expanded opportunities for its verification and correction by a growing number of stakeholders. However, with billions of human beings connected, and disinformation and misinformation circulating unhinged around the networks, democratic processes and access to reliable information are at risk. With an estimated 56.8% of the world’s population active on social media and an estimate of 4 billion eligible voters, the ubiquity of social networks and the impact of Artificial Intelligence can intentionally or unintentionally undermine electoral processes, thereby delegitimizing democracies worldwide. In this context, all actors involved in electoral processes have an essential role to play. Electoral management bodies, electoral practitioners, the media, voters, political parties, and civil society organizations must understand the scope and impact of social media and Artificial Intelligence in the electoral cycle. They also need to have access to the tools to identify who instigates and spreads disinformation and misinformation, and the tools and strategies to combat it. This handbook aims to be a toolbox that helps better understand the current scenario and share experiences of good practices in different electoral settings and equip electoral practitioners and other key actors from all over the world to ensure the credibility of the democratic system in times of profound transformations

Begleit- und Wirkungsforschung zur Hightech-Strategie : Ex-Post-Evaluierung der Fördermaßnahmen BioChance und BioChancePlus im Rahmen der Systemevaluierung

Der vorliegende Bericht stellt die Ergebnisse der Evaluation der BMBF-Fördermaßnahmen BioChance und BioChancePlus dar. Beide zielten als Vorläufer der Förderinitiative "KMUinnovativ: Biotechnologie" darauf ab, innovative und anspruchsvolle Forschungsvorhaben von kleinen und mittleren Unternehmen in der Biotechnologie zu ermöglichen. Die beiden Fördermaßnahmen unterschieden sich in Förderziel und Design: Während BioChance ab 1999 darauf abzielte, neu gegründete Firmen zu unterstützen, ging es in BioChancePlus ab 2003 darum, die weitere Entwicklung junger Biotechnologie- Unternehmen und deren risikoreichen Projekte voranzutreiben. Die vorliegende Analyse zeigt, dass BioChance und BioChancePlus eine angemessene Reaktion auf die Schwierigkeiten waren, mit denen die dedizierten Biotechnologie-Unternehmen in Deutschland in den Jahren 1999-2009 zu kämpfen hatten. Die Fördermaßnahmen wurden in ihrem Design jeweils adäquat weiterentwickelt und den Erfordernissen der Zielgruppe entsprechend angepasst. BioChance und BioChancePlus haben ihre Zielgruppen in hohem Maße erreicht: Von BioChance profitierten 15% der jungen Biotechnologiefirmen in Deutschland, der Nachfolger BioChancePlus erreichte 40% seiner Zielgruppe. Insgesamt erhielten 260 Unternehmen eine Zuwendung. 85% davon wurden nur einmal gefördert. Die öffentliche Förderung stellte eine wichtige, jedoch keineswegs die dominierende Finanzierungsquelle für die Unternehmen dar. So flossen im Zeitraum 2000-2009 rund 3 Mrd. Euro an VC-Investitionen in die Biotechnologie-Branche, während sich die öffentliche Förderung auf ca. 5% dieser Summe belief. Bei BioChance erhielten 17% der eingereichten Anträge eine Förderung, bei BioChancePlus waren es 29%. Insgesamt wurden durch die Maßnahme BioChance etwa 36 Millionen Euro und durch BioChancePlus 133 Millionen Euro an Fördergeldern gewährt