Papers by Dragana Blagojević
Zenodo (CERN European Organization for Nuclear Research), Apr 21, 2015
Marriage structure of the population is one of the basic demographic indicators because of the im... more Marriage structure of the population is one of the basic demographic indicators because of the importance that has for the birth rate and population replacement. In this paper we have analyzed data from the registers of marriages of local offices in the village Temska. Data of the marriage date, place of birth of the spouses, year of birth of the spouses, the data on the distance traveled from the place of birth to the place of marriage, as well as data on the number of divorces were collected. Analyses of these data is the most important part of this paper. The results show that the Temska is in the serious depopulation problem. The constant decline in population automatically caused rapid aging of the population. This is also connected to emigration and most certainly with the decline of the marriage rate. This problem of depopulation is at the beginning so it is necessary to undertake certain measures in order to prevent and stop thisnegative trend.
Zenodo (CERN European Organization for Nuclear Research), Mar 28, 2023
16th International Conference on Meteorology, Climatology and Atmospheric Physics—COMECAP 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Agronomy
Although corn production is affected by several harmful insects, its most important pest in the s... more Although corn production is affected by several harmful insects, its most important pest in the southeastern region of Europe is the European corn borer (ECB), Ostrinia nubilalis Hübner, 1796 (Lepidoptera: Pyralidae). Chemical control of O. nubilalis remains the main strategy in conventional corn production. The key to successfully achieving a high efficiency of insecticides is determining the appropriate moment of application, including the exact time in the insect’s life cycle when it is most vulnerable. In this study, monitoring data on the flight dynamics of ECB adults from a seven-year period (2014–2020) were exploited for the development of a predictive model of adult numbers within the growing season. ECB monitoring was performed by using light traps at 15 different locations in the Vojvodina region (Serbia) during the specified time period. First, the calendar for Vojvodina was created based on the analytics of the collected monitoring data. Additionally, the calendar was co...
Atmosphere
The drought in Serbia in the summer of 2017 heavily affected agricultural production, decreasing ... more The drought in Serbia in the summer of 2017 heavily affected agricultural production, decreasing yields of maize, sunflower, soybean, and sugar beet. Monitoring moisture levels in crops can provide timely information about potential risk within a growing season, thus helping to create an early warning system for various stakeholders. The purpose of this study was to quantify the level of moisture stress in crops during summer and the consequences that it can have on yields. For that, maize and sunflower yield data provided by an agricultural company were used at specific parcels in the Backa region of Vojvodina province (Serbia) for 2017, 2018, 2019, and 2020. The crop moisture level was estimated at each parcel by calculating the normalized difference moisture index (NDMI) from Sentinel-2 data during the summer months (June–July–August). Based on the average NDMI value in July, the new crop moisture stress (CMS) index was introduced. The results showed that the CMS values at a spec...
Zenodo (CERN European Organization for Nuclear Research), Sep 11, 2021
Fertility in the modern world is influenced by many factors, from the individual, through the inf... more Fertility in the modern world is influenced by many factors, from the individual, through the influence of the environment, to perennial changes in lifestyle and also population policy in countries. The delay in starting a family significantly affects the demographic picture of birth rates. Reduced number of children per person in the fertile period, emigration of young generations from Serbia, and large losses during the war in these areas can lead to the depopulation of one state, and thus one nation. The task of the paper is to investigate and analyze the fertility of highly educated women in the area of Novi Sad, primarily the level of education, the number of children, the desired number of children, the number of children, and the factors that influenced this achievement. The results showed that the majority of respondents want a larger number of children, two, three, or four, with only six respondents having three children and two respondents having four children. Lack of housing, incomes that are not enough to provide basic needs for one child, working hours, especially for women employed in private companies, certainly affect the realization of the desired number of children.
The possibility of using renewable energy in Serbia include energy source such as solar energy, h... more The possibility of using renewable energy in Serbia include energy source such as solar energy, hydropower energy, geothermal energy, wind energy, energy from biomass and biofuel The main potential of RES in the Republic of Serbia is the energy from biomass and it is estimated at 3,405 Mtoe where 60,3% of the potential is used through biomass The most used is hydropower energy, The Republic of Serbia is specified to have the target of 27% share of renewable energy sources in gross final energy consumption in 2020. Of the total available technical potential of RES, which is estimated at 5,6 Mtoe per year, 35% of the potential is used through hydropower (0,9 Mtoe per year), biomass and geothermal energy (1,06 Mtoe per year).
The Journal "Agriculture and Forestry", 2020
The properties of zinc oxide nanoparticles (ZnO NPs) and their use have been shown as prominent f... more The properties of zinc oxide nanoparticles (ZnO NPs) and their use have been shown as prominent for application in agriculture since it can bring certain benefits in agricultural production. The objective of this study was to estimate the impact of seed priming with ZnO NPs on yield components, plant height and spike length on wheat. In order to estimate the effects of ZnO nanoparticles on yield component, four winter wheat genotypes namely, NS Pobeda, NS Futura, NS 40S and NK Ingenio were selected. Seeds of each wheat genotypes were primed with different concentrations of ZnO NPs (0, 10, 100 and 1000 mg l-1) for 48 h in dark box by continuous aeration. Primed seeds were after sown in soil pots with 60-70% moisture contents during the till maturity. Considerable improvement was observed in plant height and spike length which increased with rates of ZnO NPs compared to the control. At rates of 10 mg l-1 ZnO NPs, the greatest increases in plant height and spike length were observed for genotypes NS Pobeda and NS Futura. At 100 mg l-1 ZnO NPs, the greatest increase for both traits was observed for genotypes NS 40S and NK Ingenio. Maximum rates of ZnO nanoparticles reduced both observed traits of wheat. The result indicated that ZnO nanoparticles can significantly increase plant height and spike length of wheat, but also plant response to ZnO nanoparticles significantly depends on concentration of application, as well as from wheat genotype.
Australian Journal of Agricultural Research, 2008
Wheat cultivars grown in south-eastern Europe are exposed to variable rainfed environments. Clima... more Wheat cultivars grown in south-eastern Europe are exposed to variable rainfed environments. Climate change predictions indicate that the frequency of dry years will likely increase in the future. This study examined relationships among agronomic traits and some drought indices with grain yield as influenced by genotype and environment. In a 4-year experiment, 100 cultivars and landraces of bread wheat (Triticum aestivum L.) from different countries were tested under 3 watering regimes: fully irrigated, rainfed, and in a rain-out plot shelter. Three selection indices, mean productivity (MP), tolerance (TOL), and stress susceptibility index (SSI), were calculated based on grain yield in irrigated and drought-stressed conditions. The additive main effects and multiplicative interaction (AMMI) models were used to study the genotype × environment effects. Average yield reduction due to drought in the sheltered plots was 37.5%. High-yielding genotypes in each treatment showed high values ...
<p>The drought in south-eastern Europe in the summer of 2017 heavily affected agric... more <p>The drought in south-eastern Europe in the summer of 2017 heavily affected agricultural production, subsequently decreasing yields of maize. The European Drought Observatory provides Combined Drought Indicator for a 10-day period with coarse spatial resolution of 5 km, which is not localized on field level. It is derived from the combination of Standardized Precipitation Index (SPI), the Soil Moisture Index Anomaly (SMA), and the anomaly of the fraction of absorbed photosynthetically active radiation (FAPAR). Monitoring moisture levels in crops can provide timely information about the presence of abiotic stress in plants and improper development within a growing season. Heat stress and low levels of moisture in maize during summer can thereafter have detrimental consequences on yield. For that reason, in this study, the crop moisture level was estimated at specific parcels by calculating the normalized difference moisture index (NDMI) from Sentinel-2 multispectral imagery during summer months (June–July–August) and the time-series of NDMI were analyzed. Based on the average NDMI value in July, the crop moisture stress (CMS) index was calculated and divided into six classes. Maize yield data on parcel level were provided by an agricultural company for the period 2017 – 2021 in the Backa region of Vojvodina province, Serbia. Yield data for the period 2017-2020 were used to calculate average yield for each class of CMS, whereas yield data from 2021 were used for validation. Mean absolute error (MAE) and root-mean-square error (RMSE) were calculated and were around 1 t/ha. The results showed that the CMS values at a specific parcel could be used for within-season estimation of maize yield and the assessment of drought effects. Also, the CMS index was tested for the 2022 growing season which had drought hazard conditions in south-eastern Europe according to the European Drought Observatory. Expected maize yield reduction estimated for specific scouted fields showed substantial and below average yield values.</p>
INTRODUCTION: In recent times, satellite-derived vegetation indices were widely used in the field... more INTRODUCTION: In recent times, satellite-derived vegetation indices were widely used in the field of agriculture especially in the assessment of crop damage and crop progress as well as in clarification of spatial variability of yield. These types of analyses play an important role in the estimation of the health condition of each crop during its growth and provide an opportunity for timely decision making. OBJECTIVES: This research aimed to inspect the correlation coefficients, during the crop growth stages, between vegetation indices (VIs) derived from Sentinel-2 imagery and grain winter wheat yield derived from yield monitoring and select the most promising indices for monitoring crop growth and yield estimation. METHOD / DESIGN: The satellite images in 10m resolution were selected based on crop growth stages, from the end of tillering phase (beginning of March 2019) until the full ripening (end of June 2019). For the analysis, the BBCH-scale for cereals was used. Yield observati...
The Law of school curriculum defines the curriculum for students from the first to the eighth gra... more The Law of school curriculum defines the curriculum for students from the first to the eighth grade of primary school. School curriculum is one of the most important school documents, which regulates the overview of the scope and structure of teaching for a longer period, according to the age of the students. The curriculum of each subject clearly defines the goals and tasks, hence the structured teaching contents and provides basic didactic-methodical instructions for its realization. This paper is focusing on the research where the target groups were the teachers of geography in primary schools. The aim was to determine the attitudes of the teachers about the school curriculum in Serbia, the possibilities of implementing innovations in the teaching, as well as activating students. Furthermore, one of the aims was to pay attention to the student workload, and the curriculum coherence by subjects.
Precision Agriculture
The upcoming technological breakthrough in the cropping system will offer a more detailed insight... more The upcoming technological breakthrough in the cropping system will offer a more detailed insight into soil-to-plant, man-to-soil, and man-to-plant impacts, thus improving the forecasting and ensuring more efficient in-field management. This study presents various on-the-go sensing procedures which were conducted in order to evaluate the quality of spatial estimations of soil physical properties such as soil compaction, soil moisture content, bulk density and texture. Standard statistical tools showed high positive correlations between soil specific resistance and soil compaction (R2 = .75), soil electromagnetic conductivity and moisture content (R2 = .72) and tractor wheel slip and soil compaction (R2 = .64). Variogram modeling of spatial autocorrelation gave the highest prediction error for tillage resistance (9.85%), followed by cone index (4.49%), moisture content (3.7%), bulk density (1.39%), clay + silt content (.98%), soil electromagnetic conductivity (.95%) and the least error was obtained for tractor wheel slip (.58%). The Central Composite Design (CCD) analysis confirmed significant contribution of soil compaction in the modeling of the specific soil resistance and tractor wheel slip, while soil moisture content and fine particle (clay + silt) content had a major impact on soil electromagnetic conductivity measurement. Soil bulk density had considerable importance in CCD modeling of tractor wheel slip.
The average temperature of the world over the past 100 years has risen by 0.6°C. The rising tempe... more The average temperature of the world over the past 100 years has risen by 0.6°C. The rising temperature will likely present a big challenge for society and the environment in the future. The population has the ability to respond to it in a variety of ways, especially nowadays when technology is evolving daily. In order to reduce the harmful impacts of climate change and allow communities to thrive in the face of it, adaptation strategies are needed. These strategies need to be accepted by local and national governments, households, and industry. This paper has aimed to derive information about each and discuss the best solution. A theory of smart cities, eco-city theory, city logistics, and sustainable cities are the main strategies whose concepts have upgraded urban planning and building design that can prevent climatic damage but are still consistent with the environment. Innovative cities in developed and developing countries have demonstrated that with the appropriate strategies...
Grain yield of wheat is a complex trait made up of the interaction between different yield compon... more Grain yield of wheat is a complex trait made up of the interaction between different yield components and environmental effects. Due to the importance of yield traits, breeders need efficient and precise methods to measure differences among genotypes. Since that spectral proximal sensing is promising for high-throughput non-destructivephenotyping, recent findings suggest that multispectral proximal sensors can be used in place of labour intensive methods to estimate specific plant traits. The objective of this study was to evaluate the impact of different spectral reflectance indices (SRIs) in assessing stem height and spike length in 4 winter wheat genotypes grown in different conditions of seed priming. Seeds of each winter wheat genotypes were primed with different concentrations of zinc oxide nanoparticles (ZnO NPs) and after sown in soil pots. Spectral reflectance from the plants at different growth stages during vegetation was measured using an active multispectral, optical se...
DETUROPE - The Central European Journal of Tourism and Regional Development, 2020
The average temperature of the world over the past 100 years has risen by 0.6°C. The rising tempe... more The average temperature of the world over the past 100 years has risen by 0.6°C. The rising temperature will likely present a big challenge for society and the environment in the future. The population has the ability to respond to it in a variety of ways, especially nowadays when technology is evolving daily. In order to reduce the harmful impacts of climate change and allow communities to thrive in the face of it, adaptation strategies are needed. These strategies need to be accepted by local and national governments, households, and industry. This paper has aimed to derive information about each and discuss the best solution. A theory of smart cities, eco-city theory, city logistics, and sustainable cities are the main strategies whose concepts have upgraded urban planning and building design that can prevent climatic damage but are still consistent with the environment. Innovative cities in developed and developing countries have demonstrated that with the appropriate strategies resource efficiency can be economically enhanced while simultaneously reducing pollution and waste. It is shown that this way improves the quality of life and supports the development of a culture of sustainability.
Zbornik radova Departmana za geografiju, turizam i hotelijerstvo, 2020
The outbreak of Coronavirus Disease 2019 (COVID-19) has affected the lives of 5,698,246 people gl... more The outbreak of Coronavirus Disease 2019 (COVID-19) has affected the lives of 5,698,246 people globally. Originating in China, the virus progressed rapidly to other countries. The COVID-19 outbreak has mostly affected cities and seriously threatened citizens' health, the economy, and the infrastructures of the urban territories. Several states were relatively quick to deploy smart technology solutions to respond to the emergence of COVID-19. Existing and new digital technologies are proposed to supplement the traditional measures within the response to the first pandemic of the decade. The term smart technologies imply the Internet of Things (IoT), Big Data, and Artificial Intelligence. The focus of this paper was to propose smart technologies as a part of the solution toward reducing the spread of pandemics in urbanized areas. One of the aims was to find positive examples of the smart city implementation during the pandemics and show its usefulness in facing it. The possibility of using real-time data, thus conducting real-time action is their main advantage and that is why more cities should use this smart concept to respond to the global crises.
Agronomy, 2021
The challenges of the global food supply and environment conservation require ongoing scientific ... more The challenges of the global food supply and environment conservation require ongoing scientific observations of soil-to-plant and plant-to-environment interactions with the aim of improving agriculture resource management. This study included observations of winter wheat yield and biomass of four varieties over three consecutive growing seasons and four site-year cases to assess the effects of nitrogen (N) fertilization rate and time of application on grain yield and biomass. For different wheat varieties, the full factorial design was performed, where factorial combinations of year, location, fall and spring N applications were laid out in a randomized complete block design. The N rate significantly influenced grain yield and biomass production efficiency. The time of N application had a highly significant effect on grain yield, biomass and NUE traits. The N rate of 120 kg ha−1 was recognized as a breakpoint over which the grain yield and biomass showed a downtrend. N application ...
The Journal "Agriculture and Forestry"
The study was conducted on a test field with an area of 255 ha including four winter wheat variet... more The study was conducted on a test field with an area of 255 ha including four winter wheat varieties (Basmati, Farinelli, Balaton, and NS40S). The objective of this research was to evaluate the suitability of NDVI and soil ECa data in the modeling of selected winter wheat properties. The results in this paper are based on observations of a plant canopy at 40 locations using an NDVI sensor measured at four stages (BBCH65, BBCH75, BBCH83, and BBCH89), as well as soil electromagnetic conductivity using an EC probe before analysis had commenced. The strongest relation between yield components and NDVIs was observed in the milk growth stage (R ranged from 0.30 to 0.67). Poor correlation was determined between soil ECa and wheat traits. Ordinary least squares regression gave models where average NDVI and soil ECa described 75% variation in plant height of the Balaton variety; 74% of Farinelli plant height changes were characterized by NDVIBBCH65 and EC; 73% of Basmati yield was explained by NDVIBBCH75 and EC. Sufficient rainfall during the growing season, high fertility of the soil and appropriate temperature regime lowered the influence of spatial heterogeneity on final crop outcomes due to optimal water and nutrition uptake.
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Papers by Dragana Blagojević