Changes of available phosphorus and potassium, total nitrogen, soil organic carbon were observed on gleyic Fluvisols at the following crops: winter wheat (2005),grain maize (2006), spring barley (2007), soya (2008), winter wheat (2009),grain maize (2010). Experiment was realized at three soil tillage technologies: conventional tillage, minimal tillage and no-tillage. Soil samples were collected from three depths (0.00 – 0.15 m; 0.15 – 0.30 m; 0.30 – 0.45 m). Ratio of soil organic carbon to total nitrogen was also calculated. Contents of available phosphorus and potassium, total nitrogen and soil organic carbon in observed soil depth. The highest content of above mentioned parameters were detected in the depth 0.00 – 0.15 m and the lowest in the depth 0.30 – 0.45 m. Difference between the first and the third soil depth was in available phosphorus 26,4 mg kg-1, in available potassium 39.5 mg kg-1, in total nitrogen content 329 mg kg-1 and in soil organic carbon 2.48 g kg-1.Soil tillage affects the content of available phosphorus and potassium in the soil significantly. The balance showed that content of available phosphorus and potassium increased about 2.5 – 4.3 mg kg-1 P and 5.3 – 8.7 mg kg-1 K.Tillage did not significantly affects the content of total nitrogen and soil organic carbon.

Both pilot experiments were carried out in the district of Veľký Krtíš. The experiment with maize was realized on loamy Luvisol (cadastre Opatovská Nová Ves), characterized by a medium Nan, conforming P, good K content and neutral pH. The experiment with potatoes was realized on loamy Fluvisol (cadastre Malá Čalomija) characterized by a medium Nan, very low P, good K content and neutral pH. The experimental site has a warm climate, with the warm and dry subarea and with mild winters. In the experiment with maize grown for grain were 4 treatments established – a control treatment and three treatments with dose increasing of granulated vermicompost (4.6; 9.2; 11.6 t.ha-1, respectively), which supplied 57, 114 and 142 kg.ha-1 total nitrogen to the soil, respectively. The experiment was not irrigated. The experiment with potatoes included 7 treatments of fertilization. The first treatment was a control treatment, i.e., without the appliance of dry granulated vermicompost. In treatment 2 to 6 increasing doses of vermicompost (3.3; 6.6; 9.9; 13.2 and 19.8 t.ha-1, respectively) were applied. Through the following doses of granulated vermicompost were applied to the soil 40, 80, 120, 160, 240 kg.ha-1 N. Not only was the granular vermicompost applied in treatment 7, but also the industrial NPK fertilizer (150 kg urea + 200 kg.ha-1 NPK 15-15-15). The pre-sowing application of granulated vermicompost was significantly influenced the grain yield of maize, starch content in the grain, a thousand kernel weight and content of five observed macroelements (N, P, K, Ca, Mg). The grain yield was increased with the dose increasing of vermicompost. A thousand kernel weight, starch content and magnesium content parameters with the increasing dose of vermicompost were reduced. A dose of 4.6 t.ha-1 vermicompost seems like the most appropriate for the parameters of a thousand kernel weight, starch and magnesium content. The increasing doses of vermicompost significantly increased the yield of potato tubers, starch content and dry matter content in tubers. The application of granulated vermicompost reduced vitamin C content in potato tubers. The use of fertilizers resulted to increasing the nitrate content in potato tubers however the application of granulated vermicompost has increased the contents of nitrates to a lesser extent than the joint application of NPK fertilizer and granulated vermicompost.

The objective of the experiment was to evaluate the effect of organic chromium on the parameters of the chemical composition and physical quality of the pork. The control group was fed by standard feed mixture. The mineral-protein dough used in feed mixture for experimental group was enriched by chromium-nicotinate, which made 0.75 mg.kg-1 Cr3+ in the complete feed. In the values of pH1 and pH24 parameter, statistically significant differences between groups were not found. We also found statistically non-significant differences in the indicator of electrical conductivity measured 45 minutes p.m and 24 hours p.m. The value of the drip-loss in % in the control group was slightly higher compared with the experimental group, but the results were statistically insignificant. The value of the CIE L* in the control group was 63.17 ± 4.26 compared with the experimental group where we measured the value 61.29 ± 4.11 which means that the control group had slightly lighter colour of meat. In CIE L * value, we found statistically significant difference (P ≤ 0.05). The value of the Warner-Bratzler shear force in the control group was slightly higher compared with the experimental group, but the results were statistically insignificant. The indicators total water, total protein and intramuscular fat were not affected by organic chromium. We found statistically significant difference (P ≤ 0.05) in content of monounsaturated fatty acids in favour of the experimental group.

The aim of this experiment was to determine the influence of mycorrhizal preparations on chosen indicators of the growth and production process of turf. The experiment was realized in the Experimental station of the Department of Grassland Ecosystems and Forage Crops FAFR SUA in Nitra in warm and dry conditions. Four indicators were evaluated: the average height of vegetation, the average daily gain of turfgrass height, the production of dry above-ground phytomass and the average daily gain of dry above-ground phytomass. In the experiment, 4 treatments were evaluated (1. no mycorrhizal preparation 2. the mycorrhizal preparation Turfcomp®, 3. the mycorrhizal preparation Symbivit®, 4. the mycorrhizal preparation Conavit®). The results showed that the lowest rate of the daily gains was detected after the application of the mycorrhizal preparation Symbivit® (4.06 mm.day-1). The lowest production was determined in the treatment with the mycorrhizal preparation Turfcomp® (2.40 g.day-1.m-2). In conclusion, we can say that when it comes to turfgrass, Turfcomp® and Symbivit® proved the most successful.

The aim of our experiment was to observe the differences of IGF-I and cortisol concentrations in the blood serum of pigs when killed immediately after transport and after a 48 hour stay in a slaughterhouse. We tested 24 Large white barrows from one breed with the average weight of 105 kg. The first group went through a 2 hour long transport before slaughter. After being delivered to the slaughterhouse, the barrows were killed immediately. After transport, the second group was stabled for 48 hours in a stabling space near the slaughterhouse and the barrows were killed after that. There were 12 animals in each experimental group. Blood samples were taken immediately after slaughter. We used the ELISA method to determine IGF-I and cortisol concentration in the serum. The IGF-I concentration in the serum was significantly lower (p < 0.01) in the barrow group that was killed after the 48 hour stay in the stabling space near the slaughterhouse, as opposed to the barrow group that was killed immediately after transport. The cortisol concentration in the serum of both experimental groups did not display significant differences. Our results indicate that stabling animals in a waiting stabling space near the slaughterhouse can cause a long-lasting stress instead of relax.

Between 2006 and 2010 at the Experimental place of Slovak Agricultural Research Centre – Institute of Agroecology Michalovce a field experiment took place on heavy Gleyic Fluvisol. The effect of various tillage of soil on soil physical properties was researched. Three soil tillage technologies were studied as follows: conventional tillage – it is traditional tillage with plowing; minimal tillage – soil before sowing was prepare by using skive plough-harrow; no-tillage – it is direct sowing without plowing. Field treatment was carried out in natural conditions without irrigation. Physical properties of Gleyic Fluvisol were determined from undisturbed soil samples taken once a year in spring (14-day after sowing of spring crops). Topsoil was sampled in cylinders of 100 cm3 in depth 0.0 – 0.3 m with four replications. Soil bulk density total porosity and maximum capillary capacity were determined. For modelling of the development of soil parameters the trend analysis was used. The development of the trend component was expressed by equation y = a + bx. The trend lines can be assumed as the major trend of the development of selected soil parameters. On Gleyic Fluvisol at direct sowing without ploughing (no-tillage) we ascertained higher bulk density and lower total porosity in comparison with conventional tillage and minimum tillage, too. Maximum capillary capacity was relatively equal and ascertained values were typical for given soil type. From evaluation of 5-years time series influenced significant increasing of bulk density under conventional tillage and direct sowing without ploughing and its decreasing under minimum tillage. The total porosity was lower under conventional tillage and no-tillage variants and higher under minimum tillage variant. Maximum capillary capacity was slightly increasing under conventional and minimum tillage systems, but it was no-significant decreasing under no-till system. The soil protective technologies, minimum tillage and also direct sowing without ploughing, are one method for keeping and conservation of the soil fertility. For their successful is needful application as whole the farming system and the continuity of this system is very important. Using of the protective technologies may also contribute to keeping of stability of ecologically sensitive the heavy soils.