Increased demand for food production, influenced by the constant growth of population, resulted in the agricultural production systems that are more energy and economy intensive. The aim of this study was to evaluate the energetic and economic efficiency of sugar beet and wheat production. Attention was given to the fertilizer usage and its share in energy consumption since it can amount to 50%. Data show that energy input in wheat production was 5.84 MJ·kg−1 and in sugar beet it was 0.93 MJ·kg−1. The highest share of energy input both in wheat and sugar beet was observed for fertilizers, 52.45% and 46.70%, respectively. Economic analysis has shown that wheat production is a low profitable production with a net return of only 20.69 USD·ha−1, in comparison with sugar beet production with a net return of 513.53 USD·ha−1. Costs related to the fertilizer use prevailed in total variable and total production costs. Economic analysis has also shown that the benefit-to-cost ratio was higher in sugar beet production (1.33) compared to wheat production (1.03). Furthermore, it was determined that these economic indicators were less sensitive in sugar beet production than in wheat production regarding the variation of fertilizer.
Using the models of family farms implementing cattle production, it has been analyzed how economic efficiency and financial feasibility of the cattle production investments is influenced by the size of family farms; the type of production; the way of securing of the land for the forage production, both under the safe and risky circumstances. During the analysis of economic efficiency the dynamical methods of investment evaluation have been used, as well as the appropriate method for risk estimation of investments. Besides, in the study has been analyzed an earlier development of the cattle production in the Republic of Serbia, its present conditions, as well as the prospective developments of the bovine production. Judging by the acquired data, it has been established that the family farms investments with a larger number of cows are more economically efficient and more financially feasible, as well as that these investments have a lower level of risk taking in the uncertain conditions of business undertakings
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