The present research was conducted during the dry and warm growing seasons of 2011, 2012 and 2013 at Guča, which is a well-known potato-growing region of Serbia. Potato was grown under both rainfed conditions and with irrigation, applying two methods: sprinkler and subsurface drip irrigation. The objective of the research was to conduct a comparative analysis and assess the profitability of potato production under rainfed conditions and with irrigation by these two methods. The main outcome of the research showed that higher yields and more profitable production are achievable with irrigation, compared to rainfed conditions. Subsurface drip irrigation was found to be more profitable than sprinkler irrigation. The results provided insight into the structure and distribution of income and expenses, the income and expense growth trend, the percentage profit growth in the case of sprinkler and subsurface drip irrigation, as well as potential income losses at the national level if the irrigation methods considered are not used. A detailed analysis of the production costs provided insight into the feasibility of optimizing potato-growing approaches for all three types of production. The higher profitability of irrigated potato production opens the question of the need to increase irrigation coverage in Serbia. Copyright © 2016 John Wiley & Sons, Ltd. RÉSUMÉLa présente recherche a été menée au cours des saisons de croissance des périodes chaudes et sèches des années 2011, 2012 et 2013 à Guča, une région de la Serbie bien connue pour la culture de la pomme de terre. La pomme de terre a été cultivée sous conditions pluviales et irriguées. Deux techniques d'irrigation sont utilisées: par aspersion et par goutte-à-goutte enterré. L'objectif de cette étude était de réaliser une analyse comparative et d'évaluer la rentabilité de la production de la culture de la pomme de terre en condition pluviale et par les deux techniques d'irrigation. Les résultats principaux de cette étude ont montré qu'un rendement plus élevé et une production plus rentable sont réalisables en conditions irriguées par rapport aux conditions pluviales. L'irrigation au goutte à goutte enterrée a été trouvée être plus rentable que l'irrigation par aspersion. Les résultats ont fourni un aperçu de la structure et de la répartition des revenus et des dépenses, la tendance de la croissance des revenus et des dépenses, la croissance de la marge bénéficiaire dans l'irrigation par aspersion et l'irrigation au goutte à goutte enterrée, ainsi que les pertes de revenus potentiels au niveau national si les techniques d'irrigation choisies ne sont pas utilisées. Une analyse détaillée des coûts de production a donné un aperçu sur la faisabilité de la croissance de l'approche d'optimisation de la culture de la pomme de terre pour les trois types de production. La rentabilité plus élevée de la production de la pomme de terre irriguée ouvre la question de la nécessité d'accroître la couverture de l'irrigation en Serbie.
Summary Years which are encompassed by the research, according to the mean daily air temperatures and precipitation, were characterized by the frequent occurrence of extremely warm and dry vegetation periods. The aim of the research is to estimate the economic viability of the production of maize, potatoes and tomatoes in terms of FI (full irrigation). The assessment of the economic viability of the application of the irrigation system when it comes to maize and potato production is done on the basis of a comparative analysis of the realized profit in the natural water regime and FI, whereas in the case of greenhouse tomato production it is done on the basis of comparative analysis of profit achieved in terms of RDI (regulated deficit irrigation) and FI. The research results indicate a positive economic effect of theirrigation system implementation because in our climate the water needs of a culture cannot be satisfied solely by precipitation, and thus water deficit occurs. This lack of rainfall causes yield reduction because it is the main parameter which increases the production profitability. Therefore, increasing the area under irrigation is very important.
The purpose of this research is to provide feasibility analysis of a long-term sustainable development concept for district heating based on wood residues. In this paper, the experimental study has been conducted starting from the data collected by field researches in municipality of
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