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The distribution of soil organic substances at five topographic sites was evaluated in the undisturbed mountainous forest of the Yuanyang lake ecosystem, northeastern Taiwan. The high annual rainfall there (>4000 mm) contributes to extreme acidity of the soil, which has a thick organic layer. The soil organic substances are classified as water soluble organic carbon (WSOC), microbial biomass carbon...
This paper describes the history of the International Society of Soil Science (ISSS), including a regional analysis of memberships and an overview of the ISSS main activities. The ISSS was founded in 1924 by, mainly, European agro-pedologists who were interested in establishing standardised methods of soil analysis and soil classification. In total, 16 international congresses were organized by the...
Ten selected Brazilian soils representative of Oxisols, Ultisols, Alfisols and Inceptisols and derived from gneiss, basalt, sandstone, diabase and itabirite were sampled and examined to provide insight into the behavior of their magnetic minerals. The objective was to measure the magnetization of the sand, silt and clay fractions and to submit the clay fraction to variable magnetic fields to obtain...
Many terms in earth sciences, and their underlying ideas, have been developed in temperate-humid countries. Both geological and climatic reasons cause gypsum-rich soils to occur in dry lands. Soil science has paid little attention to gypseous soils, and this limited knowledge is reflected in the direct loan of customary terms of soil science that can lead to misconceptions on the composition and behaviour...
The degree of quantitation achieved in the solid state 13 C nuclear magnetic resonance (NMR) spectra of a number of organic materials, an HF-treated soil, and a whole soil, was determined for both cross-polarisation (CP) and Bloch decay (BD) techniques using spin-counting experiments. The percentage of potential 13 C NMR signal, which was actually observed (C ob...
Archaeologists have observed an increasing tendency for freshly excavated iron artefacts to deteriorate due to accelerated corrosion. Iron artefacts and associated soil samples from German archaeological sites have therefore been examined and analysed. The approximate aggressiveness of the soil toward buried iron objects has been estimated by means of an existing rating standard. In addition, correlation...
In soils, P, S, and Mo occur organically bound or as oxyanions. In Oxisols, oxyanions may be strongly sorbed due to the high positive surface charge. The objective of this work was to compare chemical fractions of P, S, and Mo in differently used Oxisols with similar properties in an on-farm experiment. Soil samples (0-0.15 m) were taken from three replicate plots of each of conventional tillage (CT)...
The benchmark soils of the Indo-Gangetic plains show wide variability with respect to climate, profile development, and soil processes. We attempted to find out their relationships with the spatial distribution of reserve and available micronutrients (Zn, Cu, Fe, and Mn). For this, samples were drawn from genetic horizons of 20 benchmark profiles and total, diethylenetriamine penta-acetic acid (DTPA)-extractable...
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