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Gewählte Master / Diploma Thesis:

Arnoud Joris Maaswinkel (2016): Adaptation and Implementation of SALCA-SQ for Quality Analysis of Agricultural Soils in Austria.
Master / Diploma Thesis - Abteilung Pflanzenbau, BOKU-Universität für Bodenkultur, pp 99. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
Soil quality (SQ) forms a substantial component of the assessment of sustainability in agriculture. However, at present only few forms of life cycle assessment (LCA) exist which take SQ into consideration. Therefore, the Swiss Agricultural Life Cycle Assessment (SALCA)-SQ model was developed which assumes that SQ consists of several independent, in-field directly measurable indicators. Due to a lack of time or financial restrictions, those indicators cannot be quantified on a larger scale, so their magnitudes need to be estimated by site-specific indirect SQ indicators. The aim of this work was to adapt the existing SALCA model to geographic conditions present in Austria. A statistical reclassification of the types of climate (TOCs) via cluster analysis was conducted, soil moisture levels (SMLs) were redefined and climatic suitability zones (CSZs) were allocated throughout Austria, the latter with regard to the ambient vegetation periods. Furthermore, the applicability of the model was assessed and validated by entering at first data sets obtained from field trials from five different sites in Austria and subsequently analysing SQ of three practically operating farming businesses. From a statistical analysis, it was found that to a certain extent all three TOCs as formulated for Austria differ significantly (p < 0,05) from those defined for Switzerland. SMLs could not be redefined due to an incompatible method. A map depicting the CSZs of Austria was created from this study. Yet, the zones are defined rather imprecisely, which accounts in particular for highland areas with much variation in vegetation periods. Various tillage systems and crop rotations were found to impact especially the macropore volume, aggregate stability, microbial biomass and microbial activity. However, the tested version of the adapted model is partly based on imprecise assumptions. The model should be developed further and handled with knowledge and care when it is implemented.

Beurteilende(r): Bodner Gernot

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