Titlebook: Soil and Water Quality at Different Scales; Proceedings of the W Peter A. Finke,Johan Bouma,Marcel R. Hoosbeek Conference proceedings 1998

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Relevance of scale dependent approaches for integrating biophysical and socio-economic information ae degradation have forced more proactive integration of biophysical and socio-economic data. Natural resources management, including soil, water and land quality, involve balancing the often conflicting objectives of food and fibre production under scenarios of increasing demand, while increasing ec

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Scale issues in agroecological research chainsence. The interest in scale has developed as our understanding of processes operating at scales larger (e.g. landscape, regional) or smaller (molecular, aggregate) than the field plot has increased. As next steps are considered in this area, an examination of the ecological literature presents some

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Some considerations on methods for spatially aggregating and disaggregating soil information. The concepts of hierarchy, grain, extent, scale and variability are discussed. Slight modifications to the Hoosbeek-Bryant scheme to deal with spatial and temporal scales and various types of quantitative models are suggested. Approaches to aggregation or upscaling are reviewed. The contributions

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Small scale variability in the flow of water and solutes, and implications for lysimeter studies of ctors (each of 36 cm. area, covering a total area of 0.23 m.) located at lm depth in a poorly-structured sandy loam soil profile. Water was applied uniformly to the soil surface at constant rates of either 4.3 or 19 mm/h, and a pulse of non-reactive solute (chloride) was added once the flows of wate

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