Showing papers in "Geoderma in 2002"

TL;DR: In this paper, the change in OM quality during decomposition of mixtures of four plant materials (Medicago sativa whole ground plants, and ground litter of Eucalyptus globulus, Quercus ilex and Pinus halepensis) with a mineral red earth, incubated at different depths (5, 20, and 40 cm) for 2 years.

TL;DR: The concept of the soil inference systems (SINFERS), where pedotransfer functions are the knowledge rules for inference engines, is proposed, where the first approach to a soil inference system can optimally predict various important physical and chemical properties from the information utilising PTFs as theknowledge rules.

TL;DR: In this paper, the optimal values of soil physical quality (SPQ) parameters for enhancing field-crop productivity while maintaining or improving environmental health are still largely unknown, and progress toward identifying optimal values for some SPQ parameters might be made by comparing parameters obtained from longterm conventional tillage cropping (CT), long-term no-tillage Cropping (NT), and virgin woodlot (WL) treatments located on Fox sand (Psammentic Hapludalf), Guelph loam (Mollie Haplodalf), and Brookston clay

TL;DR: The IGBP/T data set includes some groups of soils, e.g., Andosols and Ferralsols, whose properties are extremely different from those of most temperate soils.

TL;DR: In this paper, the authors describe a novel technique for tracing connected macropores in the CT scans, which consists of sequences of so-called erosions and/or dilations of a 32-face structuring element to describe object distances and volumes of influence.

TL;DR: In this article, the authors studied selected chemical, physical and mineralogical properties of seven soils, ranging from the Tertiary Plateau down to the Amazon river floodplain in the Iranduba district, near Manaus, Amazonas, Brazil Three Terra Preta soils were classified as anthropogenic (Anthropic Xanthic Kandiudult, Anthropic Xantha kandiudox and Anthropic Dystropepts) Chemical, mineralogical and micropedological attributes, such as high total and available P and mica flakes in pottery remains found

TL;DR: In this article, the authors quantify the relationship among soil C and environmental variables for 35 forest plots in a 140,000-ha landscape in northeastern Costa Rica, and identify variables that can predict soil C storage at unsampled sites.

TL;DR: In this article, the authors present a review of protocols for XRD-based quantitative clay mineral analysis in soils, with emphasis on methods using mineral intensity factors in combination with the so-called 100% approach.

TL;DR: In this paper, the authors present a method that can be used to quantify and map soil losses at field scale produced by extreme rainfall events, using very high resolution digital elevation models (DEMs) from before and just after an extreme rainfall event.

TL;DR: In this article, the laser induced breakdown spectroscopy (LIBS) technique has been applied to the determination of total contents of heavy metals in a number of reference soil samples.

TL;DR: In this paper, the influence of land use changes on the amount and structural composition of P in the sub-humid highlands of southern Ethiopia was investigated using sequential extraction and 31 P nuclear magnetic resonance (NMR) spectroscopy.

TL;DR: In this paper, three different regression approaches: artificial neural networks (ANN), regression trees (RT), and general linear models (GLM) were used to predict soil attributes. But the performance of these methods was limited by the lack of soil taxonomic information.

TL;DR: In this paper, the authors developed an automated system for near-continuous, long-term measurements of N2O, CH4 and CO2 fluxes from cropland soils.

TL;DR: In this paper, the authors use simulated annealing to optimize the configuration of sample sites for estimation of the variogram by the usual method-of-moments approach, and apply optimized sample designs to simulated data.

TL;DR: In this article, the distribution and mineralogy of micron-sized mineral aggregates formed in the top horizon of an acid sulfate soil were determined using Synchrotron-based X-ray fluorescence microprobe.

TL;DR: In this article, a field study was carried out to evaluate the effect of the rhizosphere of Olea europaea subsp. sylvestris and Rhamnus lycioides.

TL;DR: In this article, the authors describe SOM quality for three management practices, organic farming system (OF), Integrated Crop Production (ICP) and pasture sites (G), which intend to achieve sustainable management practice.

TL;DR: In this paper, the authors measured the isotopic composition of leaf litter, roots, and mineral soil profiles in 35 plots located in a 140,000-ha study region in northeastern Costa Rica.

TL;DR: In this paper, the authors show that preferential flow paths in a structured forest soil are persistent for decades and that the concentration of organic carbon (SOC) is high in the preferential flow path.

TL;DR: In this article, a forest-to-pasture chronosequence (pasture established in 1983, 1987, and 1994) was selected at the Fazenda Nova Vida in Rondonia.

TL;DR: In this paper, the authors investigated the chemical and structural composition of the most stabilised fractions of soil organic matter (SOM), i.e., humic substances (HS), in two Vertisols (V1 and V2) developed under Mediterranean climate in Italy, using some HS characteristics as indicators of SOM turnover.

TL;DR: In this article, the authors present pedotransfer functions for hydraulic conductivity at a pressure head of � 10 cm, K10, based on measurements of near-saturated hydraulic conductivities made with tension infiltrometers in 70 soil horizons at 37 different sites in Brazil.

TL;DR: In this paper, the authors quantify the long-term effects of new practices on the surface and subsurface water quality at the Research Station Scheyern in Bavaria, Germany.

TL;DR: In this paper, the water repellency on geologically comparable forest sites with different stand ages and tree species in terms of the effects of forest transformation upon soil physical properties was investigated.

TL;DR: In this paper, the effects of the activity of seed harvesting ants (Messor bouvieri) on the fertility, rainfall infiltration, structural properties and water repellency of top soils were investigated in a semi-arid rangeland in SE Spain.

TL;DR: In this article, the authors studied the impact of agricultural expansion in the Brazilian Cerrados and the known adverse effects of agriculture on soil organic matter (SOM) dynamics of typical Cerrado land-use systems were studied.

TL;DR: In this paper, the authors present a methodology for mapping soil types illustrated by typical observations in the soil database, in this case from the La Rochelle area on the French Mid-Atlantic Coast.

TL;DR: In this paper, a measurement campaign was carried out in 1997 to monitor windblown sediment fluxes using Big Spring Number Eight (BSNE) sand-traps in a conventionally managed cultivated field and a bush fallow in western Niger.