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The agricultural sector in Poland accounted for 8% of the country's total greenhouse gas (GHG) emissions in 2014 [1]. It was the second largest source after the energy sector (81.3%) [1]. From 1988 to 2014 in Poland, GHG emissions from agriculture have decreased by 36%, whereas in the European Union (EU) the decrease has been 24% since 1990 [1-2]. The reduction of GHG emissions from agriculture was a consequence of implementing the following EU policies: Nitrate, Landfill Waste, and Renewable Energy Directives (RED), and the

Purpose The purpose of this paper is to analyse tendency of farms to switch from conventional to organic production. Design/methodology/approach The study used data on 6,229 individual farms, which in 2009–2016 continued to participate in the Polish FADN. Estimation of logit models allowed the authors to indicate, separately for each period in the years between 2009 and 2015, a set of characteristics influencing the decision of farms on the use of organic production. Findings The authors demonstrate that, first of all, land factors were of major importance when deciding on conversion to organic farming, with only the own land inputs (owned by the farm) having a positive impact on the transition of farms to organic production. But then the resource of the capital factor, identified with the assets owned by the farm, exercised a significant negative impact. Income derived from the family farm, although had a positive impact, did not significantly determine the farm’s decision on conversion to organic production. While support for agri-environmental purposes had a positive impact on the decision of farm to convert, the payments received under the direct payments affected this decision negatively. The tendency to start organic production is also conditioned regionally. Research limitations/implications The data of this study are limited in size, and limited to the Polish context. Originality/value The research setting for this paper is original; the study takes part in the discussion about factors of conversion to organic farming, on example of Poland and is a voice in the discussion on effective support for the development of organic farming in the context of sustainable development.

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The objective of this article is to assess farm efficiency and productivity change in specialised large farms located in the region of Mazowsze and Podlasie during the years 2014 − 2016. For this, we used the non-parametric Data Envelopment Analysis (DEA) method and Malmquist index. Calculations were performed for three types of large farms classified as: field crop, pig and dairy. The study shows that mean technical efficiency of large field crop, pig and dairy farms amounted to 80, 75 and 70%, respectively. Technical inefficiency of field crop farms come mainly from scale efficiency, while of pig and dairy farms equally from pure technical and scale efficiency. It shows that inefficient management practices had an impact on farm performance. Therefore, in order to increase competitiveness of farms, an improvement of management practices is required. In the studied period the share of farms operating under increasing return was as follows: 67, 72, and 81%, respectively for field crops, pig and dairy farms. The improvement of efficiency of those farms could be achieved by increasing their size. The results indicate that 8% of field crops, 12% of dairy and 16% of large pig farms were operating under decreasing scale efficiency, which means that those farms were operating above the optimal scale. The increase in their efficiency could be achieved through size reduction. In dairy farms the average annual productivity growth of 2% was recorded. In pig farms the productivity reduction of 5.4% was observed. It was the result of a decrease in technological efficiency.