Understanding the efficacy of organic trace minerals has been increasingly important over the past few years as a result of increased customer awareness of their benefits and the increase in the number of commercial products available to the customer. Organically bound trace minerals of interest in animal nutrition specifically include iron, zinc, manganese, copper, cobalt, and selenium. These elements have been shown to improve reproductive efficiency as measured by conception rate, alleviated calving, and reduced placenta expulsion rate. Additional benefits include improved growth performance of calves. The field trials in the period of 2005 – 2007 with Charolais breed beef cattle cows and calves verified efficacy of the premix PROTRACE G containing Fe, Zn, Cu, Mn, and Co chelates, Se-amino acid (selenomethionine), potassium iodide, and vitamins A, D3 and E. Average calving rate of experimental group cows fed diet with added premix was 20 – 30 min, placenta expulsion time - 28 – 31 min, but in control group fed only basal diet - 2 h 21 min and 1 h 30 min – 2 h 09 min (p is less than 0.05) respectively. Live weight gain of calves and heifers of the experimental group was on 35 – 39% higher (p is less than 0.05) than that in the control group.

Some of best varieties of plants, especially ornamentals and fruits, were polyploid. Polyploids have larger flowers and stems than diploids. In the production of polyploid forms, different types of crosses were made. In present study a cross of diploid (2n = 2x = 24) and tetraploid (4n = 4x = 48) varieties resulted in the production of highly viable seeds 89.3% on average, but a cross of tetraploids and diploids – of 39.5% on average, with fluctuating results between cross combinations. Treating seeds and bulb scales with colchicine solutions can change chromosome number of 9 varieties. These results demonstrated that optimal concentration of colchicine was 1 g kgE-1 for chromosome doubling of seeds. A high concentration (2 g kgE-1) showed phytotoxicity that is detrimental for plant regeneration. The scales of bulbs treated with 1 g kgE-1 colchicine have resulted in the production of lily polyploid forms. The polyploid plants regenerated after pre-treatment by colchicine may be selected in early stage by phenotype of young bulblets. Broad, fleshy bulb scales setting right angle to growth axis were characteristic for regenerated tetraploids. The produced polyploid plants, in comparison with diploids, had a larger diameter of the flower (+2 up to 2.5 cm), more extended plant height (+10 up to 20 cm), increased flower count (+2) and was coming into bloom 4-10 days later than diploids of the same variety.

In this study the development of meat sector in terms of livestock population, production, farm size and reproductive material, which forms economic basis for effective meat production was analysed. The aim of the study was to investigate main tendencies of meat production sector and development of economic basis in Latvian agriculture. To achieve the set aim following objectives were defined: 1) to analyse concentration and specialization processes of pig breeding farms; 2) to describe restructuring processes of reproductive pig breeding; 3) to investigate restructuring processes of farms producing beef; 4) to characterize concentration and integration processes in poultry production. The study was based on annual statistical data and statistical bulletins covering results of the Farm Structure Survey from 2001 to 2006, scientific publications, special literature and reports of international organizations. To carry out the research adequate research methods were used. The results of this study showed that meat industry has structurally changed in recent years, where the structural change can be defined as the change in the number and size of farms in pig, cattle and poultry sectors. The results also suggested that meat production sector in Latvia has become more intensive, concentrating meat production in large and specialized farms, where this tendency can stimulate the increase of meat production. Therefore, knowledge of the current tendencies and strategies of pig, cattle and poultry sectors is a necessary precondition for the development of the meat sector.

It has been shown in previous studies that transaction costs (TC) of agri-environmental policy measures often are very large both in absolute terms and as a share of payments. As agri-environmental policy measures make up an increasingly large share of agricultural policies, not least within the European Union, it is becoming ever more important to improve the knowledge about the factors determining the level of transaction costs. This paper investigates the TC determinants of one Swedish agri-environmental policy measure. More specifically, it aims to investigate if the level of TC is attributable to economic factors, such as pasture density and distances, or if political factors, such as lobby groups and political majorities at the county level, influence the costs. To evaluate if the results are robust with respect to alterations in model specifications, a version of the extreme bounds analysis is applied. Although initial results indicate that political parties influence the level of transaction costs, the extreme bounds analysis reveals that those results are fragile. It shows that five of the economic variables are robust with respect to model specifications, but none of the political variables is.

Primary energy resource consumption in the world is surveyed in the work and oil yield, production and consumption evaluated on the world level, also showing its density in the view of several states. Oil reserves are evaluated and the states with biggest oil reserves stated. The research proves consumption of primary energy oil in the world is increasing continuously. There are primary energy resources to be acquired in Latvia evaluated and primary energy resources in means of final consumption divided between types of energy estimated.

In the vocational education research, different methods including a formation and analysis of the development scenarios can be used. In the research of vocational education method of scenarios analysis is hardly ever used. In the article the chance to use the method of scenarios analysis in the research of vocational education in Latvia is evaluated. There is the AHP (Analytic Hierarchy Process) method for analysis of scenarios of the Latvia vocational education development used in the article. There are given methodological recommendations for the realisation of the formation and analysis of development scenarios.

The article deals with the issue of the impact of teaching practice on training of the future educators. At the Institute of Education and Home Management of the Latvia University of Agriculture, approaches of human pedagogy and education lie at the basis of the conceptual grounds of the school practice. The phases of the school practice are characterized and the readiness obtained by the students within the training are discussed. In every phase of the school practice, students gradually adapt themselves to the school, pedagogic and educational environments. Results of student survey on the development of readiness to pedagogic work in school educational environment and the developing role of competency are presented.

This study was conducted to investigate the lifestyle of post-graduate students. The purpose of the present study was to find out opinion of the post-graduate students how significant are physical activities and healthy eating in their life. The study was initiated due to the growing knowledge of the importance of healthy food. The study was carried out by using empirical methods and the opinion of post-graduate students living in Latvia analysed. The authors have used questionnaire method and in February 2008 received answers from 86 respondents who are the post-graduate students of Latvia University of Agriculture (LLU). Studies showed that the biggest part of research subjects appreciates the importance of physical activities and healthy eating, and treats it as a positive part of the post-graduate studies process.

Forest is the ecosystem which consists of different related components and fulfils important environmental, economic, and social functions. Each of these components is of particular value in public perception. In the beginning of September, 2007 social research was carried out in Latvia in order to understand the meaning and importance of forest value on the questionnaire base. This survey focuses on how people, whose everyday life is related to forest sector, perceive forest values. The forest values were divided into thirteen factors. To determine the most important forest value, the participants’ answers significance was evaluated basing upon the concordance coefficient and using descriptive statistic methods. The research revealed that despite the multifunctional use of forest the basic value is granted to timber and forest land. As well as respondents were not shown significant differences expressing their opinions when they were divided into different groups (forest owners, forest sector employees and other). Results of the survey have shown that the public in Latvia are not able to value and calculate forest environmental and social functions.

This paper deals with the evaluation of the geometrical accuracy of Lithuanian forests compartments geographical data that has been developed using different forest inventory techniques. Geo-reference background database GDB10LT was used as the standard for comparisons. 2500 control points on clearly identifiable places – crossroads, dikes’ intersections, etc. – were selected randomly. The main finding was that the maximal positional root mean square error of clearly identifiable objects in forestry geographic data was 16.47 m (12.37 m and 10.87 m for X and Y coordinates respectively). However, such rather big errors refer to the techniques of GIS database development using paper topographic maps as a background for forest maps and manual digitizing. Enhancement of techniques for GIS database development was found to lead to significant increase in geometrical accuracy of the information.