Comparison of Aggregate Stability Measurement Methods for Clay‐rich Soils in Asartepe Catchment of Turkey

Saygın, Selen Deviren; Erpul, Günay; Başaran, Mustafa

doi:10.1002/ldr.2383

Cited by 25 publications

(21 citation statements)

References 60 publications

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“…Higher WSA was observed in AAO and GL compared to the other types of land use because the lands had not been used for the last 20 years. Our results are in accordance with the available literature [32,34,35], which revealed that the WSA of cropland could be affected by the use of heavy farm machinery, animals, and human activity [1]. The results of the different aggregate size fractions in terms of DSA indicated that the 2-1 mm and 1-0.5 mm fractions were both affected in cropland (Table 4), with the DSA at 0-20 cm increasing in the order of Clm, Clw, CAO, GL, SGL, and AAO.…”

Section: The Dsa and Wsa Distribution Of Soil Aggregate Compositions (%)supporting

confidence: 93%

Effects of Different Land-Use Systems on Soil Aggregates: A Case Study of the Loess Plateau (Northern China)

Kalhoro

Chen

et al. 2017

Sustainability

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Soil aggregate stability is an important indicator for controlling soil losses and can improve soil quality, particularly in an area such as the Loess Plateau. The objective of this study was to estimate the differences in soil aggregates across six different land-use systems (grassland, apple orchard, abandoned apple orchard, cropland maize, cropland wheat, and shrub-grassland). For this purpose, dry and wet sieving techniques were employed to assess aggregate content and aggregate stability. Higher percentages of water stable aggregates were observed in the abandoned apple orchard and shrub-grassland at 63% and 61%, respectively. The maximum dry aggregate stability (%) was recorded at 78% and 77% in both wheat cropland and common apple orchard, and the abandoned apple orchard was only 74%. Both mean weight diameters and geometric mean diameters of aggregate were recorded as higher in grassland, shrub-grassland, and the abandoned apple orchard, than the other land uses. The formation of soil aggregates and their stability were positively correlated with soil organic carbon content and root biomass of different plant communities. Higher amounts of soil organic carbon content were noted in the abandoned apple orchard, common apple orchard, and natural grassland at the 0-20 cm soil layer. The results of the correlation coefficient showed a positive significant correlation between the mean weight diameter, geometric diameter, root biomass, and soil organic carbon content. Conclusively, the type of land use affected the soil aggregation and distribution of size fractions; the small fractions of the aggregates formed large fractions by combining with fresh organic matter, and increased soil organic carbon concentrations were closely linked with the formation of macro-aggregates. Thus, converting slope farmland to forestland and grassland could improve water-stable aggregate and reduce soil disturbances in areas (like the Loess Plateau) with the highest erosion risk.

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Section: The Dsa and Wsa Distribution Of Soil Aggregate Compositions (%)supporting

confidence: 93%

Effects of Different Land-Use Systems on Soil Aggregates: A Case Study of the Loess Plateau (Northern China)

Kalhoro

Chen

et al. 2017

Sustainability

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“…Our results corroborated with findings of Nath & Lal (), who have reported that higher water stable aggregation and MWD in Rayne silt loam soils (Typic Hapludult). Although our study did not find any effect of tillage, residue management or fertiliser application on WSA, previous studies have found tillage effects (Kumar et al ., ; Saygin et al ., ; Sundermeier et al ., ; Yagüe et al ., ). Sundermeier et al .…”

Section: Discussionmentioning

confidence: 98%

“…Various workers have reported that soil aggregates are stabilised by diverse mechanisms and perform differently against external factors, namely, rain, wind, irrigation and other farm management practices (Blanco‐Canqui & Lal, ; Bronick & Lal, ). These management practices in turn influence the relative distribution of aggregate mass, their stability (Cerdà, ; Saygin, Erpul, & Basaran, ; Yagüe, Domingo‐Olivé, Bosch‐Serra, Poch, & Boixadera, ; Mamedov, Huang, Aliev, & Levy, ) and the distribution of C and nitrogen (N) in these aggregates (Bandyopadhyay & Lal, ; Sundermeier, Islam, Raut, Reeder, & Dick, ). Of late, worldwide conservation agriculture (CA)/no‐till (NT) farming has gained impetus, and land under the CA regime has increased in area up to 124 m ha −1 by 2012 (Friedrich, Derpsch, & Kassam, ; Palm, Blanco‐Canqui, DeClerck, & Gatere, ), which was considered a sustainable and feasible approach to improve soil aggregation and also sustain or increase SOC (Powlson, Whitmore, & Goulding, ; Dalal, Allen, Wang, Reeves, & Gibson, ; Kahlon, Lal, & Varughese, : Palm et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Impact of 47 Years of No Tillage and Stubble Retention on Soil Aggregation and Carbon Distribution in a Vertisol

et al. 2017

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Aggregation often provides physical protection and stabilisation of soil organic carbon (C). No tillage (NT) coupled with stubble retention (SR) and nitrogen (N) fertiliser application (90 N, 90 kg N ha−1 application) can help improve soil aggregation. However, information is lacking on the effect of long‐term NT, SR and N fertiliser (NT, SR + N) application on soil aggregation and C distribution in different aggregates in vertisols. We analysed the soil samples collected from 0‐ to 30‐cm depth from a long‐term (47 years) experiment for soil aggregation and aggregate‐associated C and N. This long‐term field experiment originally consisted of 12 treatments, having plot size of 61·9 × 6·4 m, and these plots were arranged in a randomised block design with four replications, covering an area of 1·9 ha. Soil organic C concentrations as well as stocks were significantly higher under the treatment of NT, SR + N only in 0–10 cm compared with other treatments such as conventional tillage, stubble burning + 0 N (no N application) and conventional tillage, SR + 0 N. Mineral‐associated organic C (MOC) of <0·053 mm was 5–12 times higher (r = 0·68, p < 0·05, n = 32) compared with particulate organic C (POC) (>0·053 mm) in the 0‐ to 30‐cm layer. We found that NT, SR + N treatment had a positive impact on soil aggregation, as measured by the mean weight diameter (MWD) through wet sieving procedure, but only in the top 0‐ to 10‐cm depth. MWD had significant positive correlation with water stable aggregates (r = 0·67, p < 0·05). Unlike MWD, water stable aggregates were not affected by tillage and stubble management. Large macroaggregates (>2 mm) had significantly higher organic C and N concentrations than small macroaggregates (0·25–2 mm) or microaggregates (0·053–0·25 mm). We also found that N application had a significant effect on MWD and soil organic C in vertisols. It is evident that better soil aggregation was recorded under NTSR90N could have a positive influence on soil C sequestration. Our results further highlight the importance of soil aggregation and aggregate‐associated C in relation to C sequestration. Copyright © 2016 John Wiley & Sons, Ltd.

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“…However, a recent review of the literature found that quantification and interpretation of aggregate stability data were hampered by a lack of standardized procedures (Almajmaie, Hardie, Acuna, et al, ). Therefore, it is not surprising that modifications and new methods are being investigated (Efrat, Rawlins, Quinton, Watts, & Whitmore, ; Józefaciuk & Czachor, ; Rawlins, Turner, Wragg, Mc Lachlan, & Lark, ; Rawlins, Wragg, & Lark, ; Saygin, Erpul, & Basaran, ).…”

Section: Introductionmentioning

confidence: 99%

An improved method for determination of aggregate stability using laser diffraction

et al. 2018

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Soil aggregate water stability is very important from both scientific and practical points of view. This stability is a critical factor in a soil's susceptibility to water erosion and, in turn, land degradation. The most popular measure of soil aggregate stability is the water resistance index (WRI), which is commonly measured using the wet‐sieving method. Using the laser diffraction method in order to observe changes in the median of the particle size distribution and determine soil aggregate stability was first proposed in 2010. However, the method was not suitable for weak aggregates. The aim of this study was to present a measure of aggregate stability using laser diffractometry, aggregate stability index (ASILD). Determination of the ASILD is based on the calculation of the directional coefficient of the straight line interpolated from 2 points: (a) the value calculated as the mean of the lower and upper nominal sieve sizes used for soil aggregate separation and (b) the median of the first measurement after the adding of the dry aggregates into the measuring system of the laser diffractometer. This proposed method for the calculation of the ASILD can be applied to very weak aggregates (i.e., aggregates that, in practice, are not at all water resistant). For weak and moderately stable aggregates, the correlation between ASILD and WRI is higher than 0.9. This method also enables differentiation between the water resistance of aggregates which, by the wet‐sieving method, are indistinguishable (i.e., those which have the maximum WRI).

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Comparison of Aggregate Stability Measurement Methods for Clay‐rich Soils in Asartepe Catchment of Turkey

Cited by 25 publications

References 60 publications

Effects of Different Land-Use Systems on Soil Aggregates: A Case Study of the Loess Plateau (Northern China)

Effects of Different Land-Use Systems on Soil Aggregates: A Case Study of the Loess Plateau (Northern China)

Impact of 47 Years of No Tillage and Stubble Retention on Soil Aggregation and Carbon Distribution in a Vertisol

An improved method for determination of aggregate stability using laser diffraction

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