Most often in plant protection pressure sprayers are used which change potential energy of compressed liquid into kinetic energy of sprayed liquid. Amount of produced drops and their spectrum depend on operating pressure, size and shape of a nozzle and parameters of sprayed liquid. The aim of this study is to determine the size and amount of drifting of drops produced in sprayer with different wind velocity. The conducted calculations of the Rosin-Rammler function have revealed that the irregularity of spraying occurring as a result of drifting of drops by wind is significant. The biggest irregularity of spraying occurs within a small distance from sprayer. With the increase of this distance the amount of drifted liquid is decreasing rapidly

The energy and economic performance analysis of integrated photovoltaic and geothermal systems, for greenhouse heating, was investigated in a experimental study developed at the University of Bari, Southern Italy. A 7.2 kW geothermal heat pump combined with a 120 m vertical double U-bend ground heat exchanger was installed in order to supply the thermal energy demand of 48 m² single plastic skin greenhouse. Heat extraction energy from the soil, air temperature above the heated cultivated surface, growing media temperature, water temperature inside the heating system were measured and recorded continuously by a system composed of sensors and data logger. Results of the experiment showed that the use of geothermal sources integrated with photovoltaic panels can supply of totally heat energy demand of greenhouse with zero air emission and economy saving of 40% compared to the traditional heating systems.

The research in this paper were conducted to presents the impact of magnetically treated water on the seeds germination of narrow-leaf lupine, and next on morphological diversity of seedlings in their early stages of development. The magnetic water treatment was conducted by means of a measuring system where the water flowed through a teflon tube placed between direct current electromagnet pole pieces. Water was passed between the electromagnet pole pieces for induction of direct current electromagnet field pieces B = 100 mT, 300 mT, 600 mT i 900 mT. The highest germination capacity of lupine seeds was reached after using induction of 300 mT. This same induction of magnetically treated water additionally improved the values of root/shoot ratio, stimulated seedling weight and number of leaves. The obtained results for the laboratory experiments may also have importance for the later development stages of plant, so it important to continue resarches with influence of magnetically treated water for growth and yield of plant on the field condition.

The paper presents the test stand to the exposure of potato tubers UVC rays. Test stand (chamber) will be used in the study of the effectiveness of UVC radiation impact on the development of Rhizoctonia solani. Inside the chamber was measured: light intensity, temperature and relative humidity. Variability of the parameters ranges from 2.2 to 12.1% depending on the distance from the bottom of the heater chamber.

The paper presents the results of studies on the variation in protein and fat contents in broad bean seed covers of Hangdown White SNF variety, during the germination process at temperature of 20°C ± 1°C. The first samples were collected for analysis the next day from the beginning of the experiment while the others were taken every 24 hours during 5 consecutive days. The experiment showed an increase of fat contents in seed covers (0.94–1.35 g/100 g d.m.) with increasing germination intensity within the entire period of time and simultaneously reduction of the protein contents (4.5–3.8 g/100 g d.m.) along with the germ growth. The experiment was terminated after 144 hours when the majority of seed had germinated. During this time, the greatest decrease of protein contents (4.39–3.88 g/100 g d.m.) was observed.