Showing papers in "Geoderma in 2005"

TL;DR: In this paper, soil organic carbon (SOC), biota, ionic bridging, clay and carbonates are associated with aggregation by rearrangement, flocculation and cementation.

TL;DR: Biofertilizer has been identified as an alternative to chemical fertilizer to increase soil fertility and crop production in sustainable farming and microbial inoculum not only increased the nutritional assimilation of plant, but also improved soil properties, such as organic matter content and total N in soil.

TL;DR: In this paper, the authors quantified the soil organic carbon (SOC) and nitrogen (N) storage in silty soils under wheat, maize, grassland and spruce, and determined the SOC and N storage in water-stable aggregates of different size and in density fractions.

TL;DR: In this article, the authors examined BC in particle-size and density fractions of the surface soil of a Haplic Chernozem using a scanning electron microscope coupled with an energy-dispersive X-ray spectrometer (EDX) in order to investigate the morphological and chemical properties of BC as a function of its origin and fate in soils.

TL;DR: In this article, a combination of physical fractionation (size and density separation) and chemical characterisation (C-to-N ratios, CuO lignin signature, 13C NMR spectroscopy) was used to identify sensitive organic matter fractions in an agricultural system with sandy dystric cambisols in Bavaria, Germany, 7 years after a land-use change.

TL;DR: In this article, global data sets of rooting depths, long-term means of monthly precipitation and potential evapotranspiration, and soil texture were used to predict the probability of deep rooting around the globe.

TL;DR: The Matern model as mentioned in this paper is a generalization of several theoretical variogram models that incorporate a smoothness parameter, and it can be used to describe many isotropic spatial soil processes.

TL;DR: In this article, the influence of humic substances on phosphate adsorption was investigated and it was concluded that the presence of either humic acid or fulvic acid together with phosphate alone had limited influence on adsorbed phosphate.

TL;DR: In this article, principal component analysis (PCA) was used to distinguish between geogenic enrichment and anthropogenic pollution with Be, Cd, Co, Cr, Cu, Hg, Ni, Pb, and Zn at 14 localities in Northern and North Eastern Czech Republic.

TL;DR: In this paper, the authors investigated the time effect on the fractionation of Cu, Zn, Pb, and Cd in three typical Chinese soils, and found that the changes of the fractions were biphasic by an initial rapid step followed by a slow one.

TL;DR: In this paper, the authors applied 1st derivative Visible and Near-Infrared (VNIR) reflectance PLS regression modeling to soil samples obtained from six sites with similar soils across three counties in north central Montana, with five completely random 30% test sets selected for model validation.

TL;DR: In this article, the authors describe the construction of Australia-wide soil property predictions from a compiled national soils point database, including pH, organic carbon, total phosphorus, total nitrogen, thickness, texture, and clay content.

TL;DR: In this paper, the authors present an overview of biotic strategies and ecological processes by which decomposer organisms gain access to, or are prevented from metabolising soil organic resources. And they conclude that soil organic matter is stabilised by a complex of mechanisms that constrain decomposition rates, several of which are not based on substrate quality or soil conditions, but on the biology of decomposing soil organisms.

TL;DR: In this paper, a comparison of eight studies has shown that the input to the soil of root derived organic carbon during a growing season can range between 0.1 and 2.8 t C ha−1.

TL;DR: In this article, a small set of fundamental geometric measures (Minkowski numbers) are combined with tools of mathematical morphology to obtain Minkowski functions and the distribution of angles within the crack network to characterize the form of aggregates.

TL;DR: In this article, an amended podzolisation theory was proposed, in which relative contribution of illuviated organic matter and root litter together with organic matter dynamics provided an explanation for the large variation in the morphology of tropical podzols.

TL;DR: In this article, the authors used a combination of CuO oxidation and gas chromatography coupled via a combustion interface to an isotope ratio mass spectrometer (GC/C-IRMS) to follow variations in the isotopic composition of lignin-derived monomers in soils of the wheat-maize transition chronosequence.

TL;DR: The accumulation of carbon (C), nitrogen (N) and phosphorus (P) and their vertical distribution in the soil profile in relation to site age were studied in a chronosequence of 19 sites on reclaimed spoil heaps from open-cast coal mining, near Sokolov (Czech Republic) and compared to a semi-natural alder forest in the vicinity of the mining area.

TL;DR: In this article, a simple density fractionation scheme separated organic matter into interaggregate particulate organic matter (free light fraction, free LF), organic matter occluded within aggregates (occluded LF), and organic matter that is complexed with minerals to form a dense fraction (dense fraction, DF).

TL;DR: In this article, the authors studied the significance of soil wettability with respect to both SOM mineralisation and aggregate stability in a loess-derived Gleyic Luvisol, either used as cropland or as grassland.

TL;DR: In semiarid climate soils, the establishment of a plant cover is fundamental to avoid degradation and desertification processes, and a better understanding of the ability of plants to promote soil microbial processes in these conditions is necessary for successful soil reclamation.

TL;DR: In this article, the contents of soil organic matter (SOM) and total nitrogen (TN) in the surface soils and subsurface soils were measured in five types of floodplains classified with different flood frequencies in river marginal wetlands of Erbaifangzi, China, in 1999.

TL;DR: In this article, the effect of soil moisture and soil organic matter content on the water repellency of a former sewage field was investigated, where a topsoil block (40×80×30 cm) and a soil transect (300×100 cm) were sampled with a high spatial resolution.

TL;DR: In this article, a model based on a lattice of Hookean springs with finite strength and represents linear quasi elastic materials is presented for crack formation in clay soil. But the model is not suitable for modeling the dynamics of crack networks.

TL;DR: In this article, the influence of conservation tillage practices, such as no tillage and reduced tillage (subsoil-bedding and shredbedding), on physical-chemical, biochemical and physical soil quality indicators in a degraded sorghum field under warm subtropical conditions, after a period of 3 years.

TL;DR: Peat humic and fulvic acids were isolated from a surface horizon (0-60 cm) and deeper horizon (>60 cm), of an ombrotrophic peat bog located in Galicia (NW Spain) and which constitutes a record of paleoenvironmental contamination.

TL;DR: In this article, the effect of landscape attributes and plant community type on the spatial distribution of soil chemical properties in an alpine rangeland in a semi-arid area of Iran was addressed.

TL;DR: In this article, the results of recent studies on the concentration and flux of Si in European forest soils (podzols and acid brown soils) with published evidence on the amounts of Si cycled through forest vegetation, were concluded that phytoliths must be the principal immediate source and sink of silica in soil solution, although mineral weathering is the ultimate source.

TL;DR: In this article, the authors investigated the influence of the addition of easily available 14 C-labeled organic substrates on the mineralisation of soil organic carbon (SOC), and found that the observed priming effects can not be solely attributed to co-metabolism or turnover of microbial biomass.

TL;DR: In this paper, a splash ring device was used to characterise the spatial variation of the quantity and the aggregate size distribution of splashed soil fragments, and the amount of splashes decreased exponentially with the distance from the source.