Regional development should not be a unified process even for a small country such as Latvia. There is a stereotype that people living in big cities and rural areas differ in their values and behaviour. This study compares the human values of Riga, the Riga district urban area and different rural regions in Latvia. During the last three years - 2007, 2008 and 2009 the survey of 1450 inhabitants showed no substantial difference in peoples' social values; comparing rural and urban locations. Rather, a noticeable difference in human values between people living in different regions of Latvia was observed. It was also observed that the set of values expands in different directions over time, forcing a future increase in fragmentation and segmentation of the population in the country.

Despite Latvia being a small country, it bears marked territorial or regional differences both between smaller administrative territorial units (local municipalities, republican cities and districts) and between larger territories – regions. From 2004 till 2008 Riga received 50% of all European Union (EU) funding. Latgale received the smallest part of financing (10%); the rest of the funding was split almost equally among Zemgale (12%), Vidzeme (12%) and Kurzeme (13%). As specific tasks for the development of specific territories or a balanced distribution of financing were not put forward for the strategy of acquiring funds, the fund investment has been attracted only to those territories where the yield could be the biggest or where the absorption capacity was the highest.

Appropriate resources, availability of infrastructure, economic significance and food market forecasts determine the rationale for development of the dairy sector in the Baltic States. The sector is faced by significant economic problems; inter alia, production structure fragmentation, lack of investments and low labour productivity. Several sector's problems can be directly or indirectly solved by integration. Competition legal acts setting strict penalties directly and widely apply to integration processes, imposing a high level of legal risks on integrating parties. Thus, competition legislation forms a central framework limiting and guiding integration. As the subject has not been explored earlier, the author researched the Baltic dairy sector integration options at primary and secondary levels as influenced by the EU and Baltic national competition legislation and its implementation practice. Abstract-logical, monographic and interview methods have been used. The author concludes that law-compliant cross-border integration opportunities for the Baltic dairy sector exist to form larger integrated undertakings with higher market power. Reference to market shares in the competition legislation in countries with lower aggregate crude milk market sales puts the dairy sector participants at a disadvantage in case of integration processes resulting in smaller absolute size of the allowable integrated undertaking. Integration by agreements, decisions and concerted practices is appropriate for national level arrangements but is with limited applicability in the Baltic states cross-border integration at both levels of the dairy sector. In case of concentration, integration may be used to create cross-border integrated structures increasing concentration at every level of the Baltic dairy sector.

Health care has an important role in regional economic and politic development because human life and health is the only criterion and prerequisite for any other value. If for any reason human loses more than 20% of his blood, he is not able to join in economic actions and is under a risk of dying. That is why economic development loses human resources. In case of losing blood, human life can be saved only by donor blood, since synthetic blood replacements have not been discovered yet. In this paper, historical development of blood donor movement as an aspect of economic development has been researched. Experiments, failures and scientific discoveries in blood transmission history have also influenced world economic history. Based on historical literature in Latvia and eye witness stories, historical development of blood donor movement in Latvia as well as its role in health care as a part of economics is studied in this paper.

Implementing the land reform, territories of farms were quite often formed of several - up to 20 - land plots, frequently with disadvantageous borders. With reorganization of production of the farms, rural development and activities of land market, importance and tasks of rational territory organization will grow. Besides, it can be forecasted that, as a result of land rent and further buy-sell and other transactions, many new farmland properties and land uses are going to appear which might not correspond to the requirements of rational territory organization. It indicates that importance of land consolidation, e.i., enterprises for elimination of land fragmentation and other deficiencies of territorial arrangement, is going to increase further.

The aim of this research is to study the separation possibilities of household and rainwater sewage collectors in Riga. The performance of sewage pumping stations on the right and left banks of the Daugava River during the dry periods and those of rainfall is analyzed as well as the yearly costs of electric energy are given. This paper analyses the costs that would rise with re-building of the central regional co-system into the separated one. The locations are shown where the rainwater collectors are connected to the household sewage collectors likewise the recommendations are given for the separation of these collectors.

The possibilities to use other media instead of the sand in the filters of vertical flow are analysed in the article. The media used has to be inexpensive and its possibilities to clean the wastewater have to surpass that of the sand. The modelling of the wastewater treatment in the vertical flow filters was carried out in 2008 at the Water Research Institute of the Faculty of Water and Land Management of Lithuanian University of Agriculture. Dolomite powder was chosen for the investigation. Two models of 0.2 square m filters were made: one was filled with the sand, but the other was filled with the dolomite powder. It was found that the dolomite filter was less reactive to the primary contamination of the wastewater with the organic pollutants: when their amount rose from 320 to 460 mg O2 LE-1 according to the BOD7 index, the amount of the pollutants in the wastewater cleaned with the dolomite powder filter rose from 1.4 to 3.1 and amount in the wastewater which passed the sand filter rose from 0.5 to 13.9 mg O2 LE-1. General phosphorus was removed with the efficiency of 99.9% in the dolomite powder filter (and only with the efficiency of 87.0% in the sand filter). Therefore the dolomite powder filter will be removing phosphorus from the wastewater to the allowable contamination level for a much longer period. General nitrogen was cleaned with the effectiveness of 13.0% in the dolomite powder filter. Therefore, it is necessary to use additional means for its removal from the wastewater in the vertical filters with the output higher than 5 m**3 dE-1.

The pollution of the river water with organic matter deteriorates the chemical, biological and microbiological quality of the water and has a negative effect upon the biological variety of the water environment. The paper analyses the study period (1996-2000) seasonal change of organic matter in the upper reaches of the River Nevezis (study sites upstream and downstream Panevezys). The highest amount of organic matter (according to chemical oxygen demand and biochemical oxygen demand) got into the river under the influence of concentrated pollution, the fewer amount - under the influence of agricultural pollution and in the course of natural processes. The concentration of organic substances in the river water had a seasonal character: rivers with a better ecological state (the Juosta) were more polluted with organic matter in spring, when water temperature was below 10 deg C, but rivers with a worse ecological state (the Nevezis upstream and downstream Panevezys) – in summer (water temperature was higher than 10 deg C). This may be related with fresh pollution; in the former case organic matter might have come from the environment together with the runoff, in the latter case - due to decomposition of water vegetation and fauna residues in the river itself. In all rivers water temperature was by 0.1-4.4 deg C higher in 1996-2000 in comparison to that in 1986-1989, a significant temperature increases were observed in winter and autumn. The water temperature arose mostly below the town.

A current investigation compared various intensive crop rotations (Norfolk, row crops, cereals, short term grass) grown on Cambisols. The study results showed significant effects of N-fertilization of the agroecosystem on mineral N concentration in drainage water and its leaching process. The highest N concentration in drainage water and leaching was determined in the conditions of cereals and row crops rotations. No major impact of the crop rotation on phosphates concentration in drainage water was determined. The average leaching of one by drainage did not exceed 100-140 g haE-1 within a 7 year study period. An experiment was arranged during 1997-2003 years in the Kėdainiai district, Lipliunai willage. A rational and well-considered fertilization ensures high crop productivity and profitable farming as well as steady, which is the main condition for reduced non-point source pollution of water.

The environment relating to the history of civilization is the notion, which more and more is used when thinking about the changes occurring in Latvian culture. In this research are considered all Latvian palace and manor parks and classified as an integral part of the heritage. The research was done from the year of 2009 to 2010. Fundamental principles the quality of today’s parks were taken, first of all, evaluating the cartographical and historical materials and available literature sources, secondly, chosen, mostly historically rich and varied parks, evaluating basing on landscape evaluation criteria, and, thirdly, summarizing the qualified parks, for working out qualitative and sustainable park development models in the future researches. Working out the evaluation system and principles of historic parks, it is possible not only to reanimate the historical landscape, but also get back the total landscape atmosphere, in spite of the loss of the main ensembles or their partly ruination. The park qualification, structure investigation, landscape inventory and analysis, as well as European experience in historic landscape maintaining and development, according to a similar landscape structure, which nowadays successfully functions as a heritage, is the base for an optimal and sustainable culture landscape development. The worked out order helps in understanding and analyzing the meaning of the historic park and its successful development tendency, in which are marked out the most important heritage objects in the particular landscape and they are reverted in a vital pulse and social processes.