Rural areas, especially in developing countries, are facing with numerous social, economical, cultural and environmental problems. In the most cases there is a growing concern because only very few farmers or inhabitants are able to follow contemporary, sustainable and environment-friendly methods in farming systems. The consequences of this are numerous, such as: poverty, significant migration to urban areas and unplanned suburban settlements. This has a significant impact on the national economy, demography, and environment.

The aim of this investigation was analysis of main mixing-distribution trailer working parameters. This will serve as a base for evaluation of possibilities for obtaining better feed preparation quality on farms, more uniform feed distribution, higher productivity and energy saving. Results have shown that different conceptions of mixing-distribution trailers have different quality of food distribution. Best uniformity of distribution was achieved by using of trailer with horizontal mixing rotor and with tiller for silage cutting and loading.

In this paper influence of greenhouses' structure was estimated for four different double plastic covered greenhouses in winter lettuce production. Plastic coverings are introduced as mean of making this kind of plant production more efficient. Also, as a mean of lowering energy consumption, the tunnel structures are proposed. Four different double plastic covered greenhouses were used for energy analysis. Two tunnel types, 9 x 58m and 8 x 25m covered with double PE folia, and two gutter connected plastic covered greenhouses.