In Serbia irrigation is not widely utilized to reduce water scarcity in crop production. Therefore, wheat yields largely depend on weather factors. Over the past two decades, there has been recorded a significant change in weather conditions in Serbia. Such change produces concerns about Serbia's food security and exports since wheat is among the most important agricultural products. In this paper authors analyze and quantify the impact of weather factors on the achieved wheat yields, using a set of panel data on selected Serbian municipalities in fourteen years (2000-2013). The multidimensional regression was conducted as a sort of quasi-experiment, combining data on achieved yields in selected municipalities, with data on weather factors: temperature, precipitation, extraterrestrial radiation, and evapotranspiration. Utilizing the Hargreaves method of determining reference evapotranspiration, average daily water deficit was computed as a single representative indicator of weather conditions. Testing was conducted on four predefined sub-periods within the vegetation season of wheat, and the impact of average daily water deficit on wheat yields was estimated for each of these sub-periods. Results show a robust, statistically significant impact of change in average daily water deficit on decreased wheat yields. Growth of water deficit by 0.1 mm, in the period November 15th to April 1st results with 175 kg/ha lower yields, while in the period April 1st to May 15th results in 45 kg/ha lower yields. Impact shows to be conditional on the altitude, rapidly losing on intensity and significance above 100 m.

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Fruit production has important role in development of the Serbian agriculture. Within the structure of grown fruits, apple takes remarkable share. As a fruit species suitable for processing and longer storage, apple is traditionally use in households as fresh or processed. One of the alternatives for apple processing that could be a good solution for small family agricultural holdings represents the production of apple chips. Implementation of mentioned processing is suitable as from the aspect of size of needed investments and relatively simple technological requirements, as well as towards the quit a short period of return on invested assets, or possibility to engage installed equipment and farm members out of apple processing campaign. On the other hand, apple processing would certainly ensure the creation of added value and continuity of the farm income, what would primarily have a positive effect on farm sustainability. The main goal of paper is to consider the power of contribution margin obtained in apple chips production at farm level. Research involves one production cycle (three-month campaign), where presented data and results are referring to 2018. According to gained results, derives a conclusion that processing of apples into the apple chips could be a good alternative for small farms concerning the creation of its additional income.

The aim of this paper is to determine the economic viability of the electronic warehouse receipt registry introduction, as a step toward electronic warehouse receipts. Both forms of warehouse receipt paper and electronic exist in practice, but paper warehouse receipts are more widespread. In this paper, the dematerialization process is analysed in two steps. The first step is the dematerialization of warehouse receipt registry, with warehouse receipts still in paper form. The second step is the introduction of electronic warehouse receipts themselves. Dematerialization of warehouse receipts is more complex than that for financial securities, because of the individual characteristics of each warehouse receipt. As a consequence, electronic warehouse receipts are in place for only to a handful of commodities, namely cotton and a few grains. Nevertheless, the movement towards the electronic warehouse receipt, which began several decades ago with financial securities, is now taking hold in the agricultural sector. In this paper is analysed Serbian electronic registry, since the Serbia is first country in EU with electronic warehouse receipts registry donated by FAO. Performed analysis shows the considerable impact of electronic warehouse receipts registry establishment on enhancing the security of the system of public warehouses, and on advancing the trade with warehouse receipt.

Water is the source of life for all living beings, but also an irreplaceable input in agricultural production. According to the available water and land potentials in Serbia irrigation is used at generally negligible arable areas. Although it represents an agro-technical measure whose implementation usually causes significant investment costs for the farm, its application ensures high and stable yields of high quality crops' fruits, while indirectly it affects increase in incomes and continuity in farm sustainability. The main goal of the paper is presenting an assessment of the effects of investing in implementation of the irrigation system (type Tifon) on a small family farm primarily active in crop farming. Investment analysis was based on basic static and dynamic methods for assessing the effectiveness of investments. The assessment was focused to two modalities in crop production, i.e. implementation of irrigation in crop farming at 25 ha and 30 ha. In both observed modalities the investment was assessed as economically justified alternative for farm business improvement, while there are shown slightly better results with the rise of used agricultural surfaces.

Paper's focus is on the economic effects of introducing energy from renewable sources (solar energy) in the raspberry production (mainly for irrigation). Main goal is to assess economic effectiveness of investment in establishing and exploiting raspberry plantation, as well as implementation of required equipment and mechanization, from the point of two investment scenarios. First scenario considers conventional way of raspberry production, compared to raspberry production under mobile solar robotized electric generator. Methodologically, the analysis implies application of a set of methods for dynamic evaluation of investment and methods for evaluation of investments under uncertainty (the net present value, the internal rate of return, the payback period and the break-even point).The result of conducted assessment shows that, apart from ecological benefit, there is high economic justification of investment into device used for transfer of renewable into electric energy in raspberry production.

The process of improving tourism requires prior determination of the existing offer, as well as assessment of the advantages and weaknesses of the given offer. Upon the analysis, it is possible to improve the tourist offer. This study examined ways in which agro-tourism can be improved, related to the foundation of sustainability. Methodologically, this article involves the use of expert assessment, additionally supported with fuzzy logic based on the fuzzy PIPRECIA and fuzzy MARCOS methods. Using the fuzzy PIPRECIA method, the criteria and sub-criteria were weighted, while the observed agro-tourism facilities in Bosnia and Herzegovina (BiH) were ranked according to the applied fuzzy MARCOS method. The results of the application of the fuzzy PIPRECIA method showed that for experts the most important are economic criteria, then environmental, and the latter important are social criteria. The most important sub-criterion is the quality of services. Out of the six facilities in question, the most appropriate results are achieved at the “Šadrvan” rural household, while the worst outcome is exhibited at the agro-tourism facility, (rural household) “Kovačević.” Sensitivity analysis confirmed these results. The aim of this article was to evaluate the agritourism offer in BiH, taking into consideration these six agritourism facilities. Based on that, it is necessary to determine on what advantages to build agritourism in BiH, and what should be corrected in order to be more competitive. Based on the obtained results, the facilities management should determine which sustainability criteria would need to be improved, as well as on which criteria it is desirable to build a competitive advantage, aiming to advance the tourist offer.

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