scholarly journals The aggregate stability of the soil in respect to the uniform aggregate stability indicator

2007 ◽  
pp. 83-99
Author(s):  
Andrea Huisz
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Soil Structure ◽  
Aggregate Stability ◽  
Stability Index ◽  
Soil Types ◽  
Fundamental Properties ◽  
Efficient Protection ◽  
Wet Sieving

Soil structure and its quality are fundamental properties because they control many processes in soils. Tillage, crop and other factors influence soil structure. Efficient protection of it needs indication of changes in soil structure. A new Normalized Stability Index proposed by Six et al. (2000) tries to evaluate these changes, which was compared with some former used indices. The most common method (wet sieving) was modified to reduce the confounding effects of different particle size distribution of different soil types and method used to the investigation. Changes in soil structure caused by tillage and crop management therefore have been made quantitative and comparable. In this paper, we review the new method and Normalized Stability Index proposed by Six et al. (2000) and present the results of our investigations.

scholarly journals Soil Structure and Soil Organic Matter of Selected Soil Types in Different Ecosystems

2013 ◽  
Vol 59 (1) ◽  
pp. 1-8
Author(s):  
Erika Tobiašová ◽  
Vladimír Šimanský ◽  
Bożena Dębska ◽  
Magdalena Banach-Szott
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Soil Structure ◽  
Soil Types ◽  
Productive Capacity ◽  
Important Indicator

In this study, differences in soil structure in different ecosystems (forest, meadow, urban, and agro-ecosystem) and soil types (Haplic Chernozem, Haplic Luvisol, Haplic Stagnosol) with a dependence on the influence of quantity and quality of soil organic matter and the particle size distribution on fraction composition of soil aggregates were compared. Soils had different productive capacity and particle size distribution. The most favourable soil structure was in the agro-ecosystem, then in forest, meadow, and urban ecosystem. The worst soil structure was in Haplic Stagnosol. An important indicator in assessing of ecosystem influence, water-resistant macro-aggregates of the 0.5-1 mm size fraction seems to be. This fraction was the only one which was statistically significantly influenced by the ecosystem, and also the only one which was not statistically significantly influenced by the soil type. This fraction also was not influenced either with the quantity and quality of soil organic matter, or with the particle size distribution. The quantity of soil organic matter is reflected in relation to the fractional composition of dry-sieved aggregates and its quality in relation to waterresistant aggregates. Large fractions of water-resistant macro-aggregates were in positive correlation with C : N ratio, the amount of extracted humus substances, or stability and quality of humic acids; while smaller fractions were in negative correlation just with these parameters. Clay and silt fractions had a positive influence on waterresistant macro-aggregates formation, while sand fraction had negative and vice versa.

scholarly journals Risiko des Eintrags von Phosphor in den Hallwilersee durch Bodenerosion

2015 ◽  
Vol 70 (3) ◽  
pp. 193-198 ◽  
Author(s):  
S. Müller ◽  
D. Schaub
Keyword(s):  
Particle Size ◽  
Soil Erosion ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Surface Waters ◽  
Aggregate Stability ◽  
Eutrophic Lake ◽  
Soil Samples

Abstract. An important factor in the release of phosphorus by soil erosion, with corresponding consequences on the quality of surface waters, is the formation of aggregates and their stability. Around the eutrophic Lake Hallwil six arable lands were examined in five repetitions regarding aggregate and particle size distribution, P-contents of the different fractions and aggregate stability. Central to this was the use of the setting column for fractionation of soil samples. In the case of Lake Hallwil the risk of phosphorus discharges by soil erosion seems low since the phosphorus is mainly bound in aggregates which are transported over short distances only. Thus other pathways (runoff from grassland, leaching via drains) may be more important.

Multifractal Characteristics of Soil Particle Size Distribution under Sewage Irrigation in Different Irrigation Years

2014 ◽  
Vol 700 ◽  
pp. 205-210 ◽  
Author(s):  
Ye Lv ◽  
Xiao Yan Guan ◽  
Ben Qing Ruan ◽  
Yan Wei Wang
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Soil Structure ◽  
Multifractal Spectrum ◽  
Soil Particle ◽  
Sewage Irrigation ◽  
Remarkable Effect ◽  
Soil Particle Size ◽  
Soil Particle Size Distribution

Soil particle size distribution (PSD) is one of the most important physical properties of soil due to its strong influence on hydraulic characteristic, fertility condition and erosion of soil, etc. Sewage irrigation causes the differences in soil PSD. Thus, there may be massive organic contaminants and suspended particles in soil. In this paper, the frequency and multifractal necessity of soil PSD under sewage irrigation in different years were analyzed. Soil PSD demonstrates a heterogeneous characteristic under sewage irrigation, and this heterogeneity can be characterized using the multifractal technique, which calculates the multifractal spectrum parameters. The results showed that the width of multifractal spectrum ∆α is directly proportional to clay content; a remarkable effect of sewage irrigation on multifractal parameters was observed. The soil structure quality decreased with increasing sewage irrigation years. However, the soil structure improved when the soil was irrigated with freshwater for a long period after sewage irrigation. Therefore, multifractal parameters may be potential indicators for the physical property and quality of soil.

THE RELATIONSHIP BETWEEN STRUCTURAL STABILITY AND CHEMICAL CRITERIA OF SOME SOLONETZIC SOILS OF NORTHWESTERN ALBERTA

1967 ◽  
Vol 47 (3) ◽  
pp. 231-237 ◽  
Author(s):  
S. W. Reeder ◽  
M. A. Arshad ◽  
Wm. Odynsky
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Structural Stability ◽  
Morphological Characteristics ◽  
Aggregate Stability ◽  
Water Stability ◽  
The Relationship ◽  
Exchange Acidity

The Solonetzic soils of this study included three profiles at each of two widely separated sites that had a range in morphological characteristics from Solonetz to Solod soils. The soils had developed under similar conditions and were as identical between sites as could be determined by field methods.Clay mineral properties, particle size distribution, and total chemical composition of the soils revealed the uniformity of materials within and between sites.Differences in the soils, within and between sites, were disclosed by exchange analysis, soluble salt analysis, pH's and water stability of aggregates.The results of this study indicate that pH as well as Al3+ and exchange acidity content play a role in determining aggregate stability in these soils. Some hypotheses of the formation of stable structure in the B horizons of these soils are discussed in the light of the evidence presented.

scholarly journals Effect ofMeasurement Method and Wet Sieving Time on Index of Soil Aggregate Stability

2009 ◽  
Vol 7 (2) ◽  
pp. 54-57
Author(s):  
Dwi Putro Tejo Baskoro ◽  
Henry D. Manurung
Keyword(s):  
Soil Erosion ◽  
Soil Degradation ◽  
Aggregate Stability ◽  
Aggregate Size ◽  
Stability Index ◽  
Soil Aggregate ◽  
Soil Types ◽  
Soil Aggregate Stability ◽  
Wet Sieving

Aggregate stability is one of the important factors to be taken into account in controlling soil degradation. It influences soil ability to resist soil erosion. Therefore, it is necessary to have accurate measurement of aggregate stability that able to express well its resistance to dispersion. In this study, aggregate stability of various soil types were measured using different wet sieving time and aggregate size. Latosol Sindangbarang showed the highest aggregate stability index (ASI), followed by Podsolik Jasinga, Andosol Sukamantri, Lalosol Darmaga, and Regosol Sindangbarang Wei sieving time significantly affected AS!. The ASI decreased as wet sieving time increased The result also showed that different methods result in significantly different stability index. The method that used smaller size aggregates (< 2.83 mm) results in about 3 to 4 times higher stability index.

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