Climate factors have an impact on plant life cycle, yield, productivity, economy and profitability of agricultural production. There are not a lot of studies on understanding of influence of climate factors variation on maize yield in agro-ecological conditions of Serbia. The aim of this paper is analysis of variation of climatic factors over a long-time period, as well as assessment of impact of the examined climate parameters on maize yield in two localities in the Republic of Serbia. For the analysis of climatic factors (temperature, precipitation, sunshine, humidity) in the region of Central Serbia and Vojvodina, the data of meteorological stations Kragujevac and Sombor during two thirty-year periods (1961–1990 and 1991–2020) were used. In order to determine the existence and strength of the relationship between the observed climatic factors and maize yield, a correlation analysis of these indicators for the period 2005–2020 years, was performed. In the period 1991–2020, the average values of temperature were annually increased for 0.046 °C in Kragujevac and for 0.05 °C in Sombor, and in the same period the average value of sunshine on an annual level was increased for 1.3 h in Kragujevac and for 5.01 h in Sombor, 2020 in comparison to average values in period of 1961–1990. The humidity was decline annually for 1.3 in Kragujevac and for 3.4 in Sombor in period 1991–2020 in comparison to average humidity in period of 1961–1990. The results of the correlation analysis showed that the maize yield was significantly lower in the years with expressed high temperatures and precipitation deficit. Based on these studies, established effect of climate change on maize yield and that this demand developing adaptation agricultural practice through creating maize hybrids and varieties with greater adaptability and improvement of agrotechnic measure.

The concept of corporate social responsibility in the broadest sense means the ways in which companies communicate with their stakeholders. The aim is to establish a balance between the economic, social and environmental aspects of the environment. In recent years, corporate social responsibility in Serbia is becoming more and more interesting. Serbia is, as a country, still in the process of transition with economic and social problems that further have an impact on the lack of responsible behavior by companies. As companies have an impact on social development in the communities in which they operate, they therefore also have responsibility that extends beyond the boundaries of making a profit. An important feature of our society is the responsibility of ranking on a scale of values of successful and modern companies. The aim of the study was to examine the effect of educational level on the perception of the concept of corporate social responsibility. The research was carried out on the territory of Šumadija district. Respondents' answers were analyzed by applying the method analysis of variance (ANOVA).

The paper starts from the hypothesis that the examined area is characterized by a process of intensive functional transformation accompanied by certain population changes. The transformation of the settlement structure is shown in the area of Sumadija district. The trend of demographic and economic development was observed with a historical overview. It was upgraded with quantitative analyzes (chain index, population change index, functional classification, index of specialization and localization) for the period 1971-2011. The aim was to determine the degree of socio-economic transformation of Sumadija district and the regularities according to which these changes took place. Industrialization generally brings changes in the functional orientation and redistribution of the population. The deagrarianization was one of the main features, with parallel emigration of the rural population. These changes were intensive in 1961-1981, when the peak of employment in secondary activities was registered. Since then, significant spatial transformation in Sumadija district was visible. Special analyzes were used to confirm the assumption that Kragujevac is a dominant labor center, an administrative and service nucleus, which has a propulsive influence on the development of its immediate surroundings (suburban belt) and the wider area (Sumadija district). The contribution of this paper is in the understanding of the scope, spatial distribution, and intensity of changes that have occurred in Sumadija district. It introduces the historical circumstances and quantitative research into a broader concept as a basis for understanding the trajectories of spatial and socio-economic development, and responds to many social challenges specific for this territory.

The goal of this paper is to examine the existence of correlation between temperature and precipitation as independent variables and crop yield (wheat, corn) as dependent variable by applying Spearman's rank correlation coefficient. As the research field, region of Gruža is taken, more precisely county of Knić. Climate features of previously mentioned territory are obtained by monitoring the climate elements condition (temperature and precipitation) for the time period from 1991 to 2011 in weather stations Kragujevac, Kraljevo and Rudnik. Shifts in climate elements values are usually consequences of climate changes, which manifest in our country and shave significant impact to crop yield.

It is important for every consumer that the product he consumes is of good quality and safe for his health. An organic product for the consumer means quality and health. It is of crucial importance to look into the the organic food market, and based on that determine what the goals are and create a strategy to achieve the set goals. The organic market is the main source of information for organic food producers. Before organic products are being placed on the market, the target group of consumers to whom the marketing mix will be directed should be determined on the basis of information from the market. Various surrounding impulses affect consumer behavior, so it is necessary to continuously monitor all important factors, in order to meet consumer demands in a timely manner. Consumer behavior in the market is the result of the tendency of consumers to best meet their needs and desires. The goal of the research is why and how consumers buy and consume certain products, respectively, what are the motives for their purchase. The research was conducted in the period from September until December 2020. on the sample 250 respondents in the territory Republic Serbia. Field research was conducted through a questionnaire consisting of seven question and based on the answers received, the results were processed. The most important indicators of this research are that consumers are less likely to buy organic products due to the lower purchasing power of the population, but also insufficient information, and the main motive for buying is that organic products are healthy products.

Average global temperatures have increased over the last decades and a further rising trend is predicted. Such events are usually explained in the scientific community because of increased concentrations of greenhouse gases, as evidenced by reports of the Intergovernmental Panel on Climate Change. The paper presents data on the concentration of greenhouse gases in the territory of the Republic of Serbia for 1999, 1998 and 2013. Comparison of air temperature as one of the basic climatic elements was performed. This is done by using the data processing meteorological stations in Kragujevac. Data were compared to the state of air temperature for the period 1961-90. years and 1981-2010. years. The obtained results show that the air temperature increased by 0.6° degrees Celsius.