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Literatūros šaltiniuose pastaruoju metu teigiama, kad siekiant pasiekti optimaliausią derliaus kiekį žemės ūkyje yra naudojama labai dideli kiekiai ir įvairumas trąšų ir kad taip yra alinamas dirvožemio ariamasis sluoksnis. Todėl magistro darbe iškeltas tikslas yra įvertinti tręšimo įtaką dirvožemio taršai bei trąšų efektyvumą kultūrų prieaugiui agrocenozėse, išanalizuojant žemės ūkio normatyvus. / Literary sources have been stating recently that in order to achieve an optimum harvest quantity huge amounts of fertilisers and their variety are used in agriculture and thus the arable layer of the soil is impoverished. As a result, the objective set in the Master‘s Thesis is to evaluate the influence of fertilisation on contamination of the soil and fertiliser efficiency in respect of crop growth in agrocenoses by performing the analysis of the agricultural norms.

"Arsenic is a common soil contaminant in Australia and worldwide. There is a need to find safe, effective and economic methods to deal with this problem. The soils used in this research were collected from central Victoria. They were contaminated with arsenic by historic gold mining activity or by past sheep dipping practices. This research investigated ten different leaching agents for their effects on three different arsenic contaminated soils. [...] Electrokinetic experiments were conducted on three arsenic contaminated soils. [...] The arsenic in these soils appears to be relatively stable and immobile under oxidising conditions. The soils had a high iron content which assists in the stabilisation of arsenic. This is beneficial with respect to the environmental impact of the arsenic contamination, however, it remains an obstacle to low cost electrokinetic remediation." / Masters of Applied Science

"Arsenic is a common soil contaminant in Australia and worldwide. There is a need to find safe, effective and economic methods to deal with this problem. The soils used in this research were collected from central Victoria. They were contaminated with arsenic by historic gold mining activity or by past sheep dipping practices. This research investigated ten different leaching agents for their effects on three different arsenic contaminated soils. [...] Electrokinetic experiments were conducted on three arsenic contaminated soils. [...] The arsenic in these soils appears to be relatively stable and immobile under oxidising conditions. The soils had a high iron content which assists in the stabilisation of arsenic. This is beneficial with respect to the environmental impact of the arsenic contamination, however, it remains an obstacle to low cost electrokinetic remediation." / Masters of Applied Science

Thesis (PhD)--Macquarie University, Graduate School of the Environment, 2001. / Bibliography: p. 10-1 to 10-23. / An overview of contaminated land issues -- Land contamination law -- The impact of environmental planning on contaminated land value -- Identification and management of contaminated land -- Contaminated land valuation method - an overview -- Current stigma assessment methods -- Suggested method for stigma assessment -- General conclusion. / This dissertation is about the valuation of contaminated land and the problem of stigma. The value of contaminated land is to a large extent affected by statutory regulations. Stigma, if it exists, is another factor that has significant impact on contaminated land value. This thesis looks at the relevant laws governing contaminated land in Australia. It also introduces an alternative method to assess the stigma factor. -- Contaminated land is a major environmental problem. Apart from causing actual or potential threats to human health and the environment, contaminated land also leads to legal liabilities and financial losses to the landowner. Regarding financial losses, they may be costs to meet legal requirements in relation to clean up and long term monitoring expenses. In addition, they may be losses due to a drop in market value and/or rental of the property, longer vacancy periods, high remediation and monitoring costs. In the extreme case, the property may lose marketability completely. -- Regarding valuation methods, most valuers use traditional valuation methods with arbitrary adjustments. The most straightforward method is the impaired value (affected value) approach. It requires the valuer to assess the property on a clean land basis. From the unimpaired (clean) value, other financial losses due to contamination, remediation costs and stigma value loss are deducted to get the impaired value. The most difficult part is to quantify stigma impact. The existing stigma assessment methods are not satisfactory. Alternative and non-traditional methods are available. However they are academic and are not suitable for day-to-day operation of a valuer. This thesis suggests a multi-criteria decision-making model to assess stigma impact. The target stigma factor is obtained by processing the relevant criteria with the Analytic Hierarchy Process (AHP) method. The best alternative from the model is the reasonable stigma factor for the property. / Mode of access: World Wide Web. / various pagings ill. (some col.)

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv. / Härtill 4 uppsatser.

Diss. (sammanfattning) Umeå : Sveriges lantbruksuniv., 2006. / Härtill 4 uppsatser.

Thesis (Ph.D.)--Mississippi State University. Department of Plant and Soil Sciences. / Title from title screen. Includes bibliographical references.

Thesis (PhD. (Applied Science))--University of Pretoria, 2001. / Summaries in Afrikaans and English.

Thèse (D.R.Min.) -- Université du Québec à Chicoutimi, programme en association avec l'Université du Québec à Montréal, 2006. / Bibliogr.: f. 150. Document électronique également accessible en format PDF. CaQCU