Effects of aggregate structure and organic C on wettability of Ustolls

Eynard, Anna; Schumacher, Thomas E.; Lindstrom, M. J.; Malo, D. D.; Kohl, R. A.

doi:10.1016/j.still.2005.06.002

Cited by 63 publications

(34 citation statements)

References 35 publications

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“…alkyl chain length, alkyl chain saturation, ionized molecules). This may explain the inconsistent results on whether or not the amount of soil organic matter (SOM) has an influence on the occurrence or severity of WR (Aelamanesh et al, 2014;Eynard et al, 2006;Hajnos et al, 2013;Mataix-Solera et al, 2013;Mataix-Solera and Doerr, 2004;Mirbabaei et al, 2013;Varela et al, 2005;Vogelmann et al, 2013;Woche et al, 2005) and the findings of pronounced differences in the effects of a range of organic molecules on WR (de Blas et al, 2013;Doerr et al, 2000;Fischer et al, 2013;Simkovic et al, 2008). WR can be assessed by means of the water drop penetration time (WDPT) test (e.g.…”

Section: Introductionmentioning

confidence: 99%

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Keck¹,

Felde

Drahorad

et al. 2016

Journal of Hydrology and Hydromechanics

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Abstract:The biological soil crusts (BSCs) in the NW Negev cause local water redistribution by increasing surface runoff. The effects of pore clogging and swelling of organic and inorganic crust components were intensively investigated in earlier studies. However, the effect of water repellency (WR) was not addressed systematically yet. This study investigates subcritical WR of BSCs in three different study sites in the NW Negev. For this purpose, three common methods to determine soil WR were used: (i) the repellency index (RI) method (ii) the water drop penetration time (WDPT) test and (iii) the Wilhelmy plate method (WPM). Furthermore, the potential influence of WR on local water redistribution is discussed and the applied methods are compared. We found the BSC to be subcritically water repellent. The degree of WR may only affect water redistribution on a microscale and has little influence on the ecosystem as a whole. The RI method was clearly the most appropriate to use, whereas the WDPT and the WPM failed to detect subcritical WR.

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Section: Introductionmentioning

confidence: 99%

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Keck¹,

Felde

Drahorad

et al. 2016

Journal of Hydrology and Hydromechanics

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“…Similar results were obtained for dependence of ρ d on P n (r = -0.38 to -0.63, also Figure 7). Further, moderate positive dependence of P on SOM was observed in all cutting regimes (similarly Eynard et al 2006) with correlation coefficients 0.34-0.60 (also Figure 8). Between θ CMC and ρ d or SOM none or very weak dependence was established (also McVay et al 2006).…”

Section: Change Of Soil Physical Propertiesmentioning

confidence: 66%

“…Mikhailova et al (2000) mention different soil ρ d values under natural mesoxerophile grass cover (0.80 ± 0.09 g/cm 3 ) in a plot lying fallow since 1935 and prior to that grazed for 300 years, compared to grassland (originally also natural) now grazed in the spring and cut in the summer (0.97 ± 0.06 g/cm 3 ). Eynard et al (2006) found a positive correlation of porosity with the soil organic carbon content in PGA. Evrendilek et al (2004) found out that the content of soil organic carbon was positively correlated with available water capacity and the overall P and negatively correlated with ρ d .…”

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confidence: 82%

Effect of cutting regime on soil physical properties of wet thistle meadows

Duffková¹,

Kvítek²

2009

Soil & Water Res.

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Changes of selected soil physical properties (porosity P, soil organic matter SOM, bulk density ρ d , particle density ρ z , characteristics of water retention capacity -maximum capillary water capacity θ CMC , and non-capillary porosity P n ) of permanent grassland (wet, non-fertilized, thistle meadows ass. Angelico-Cirsietum palustris, crystalline complex area, Czech Republic) in the top soil layer (3-10 cm) managed under three regimes (uncut UC; cut once a year C1; cut twice a year C2) were monitored for one undrained and two drained sites. There were no significant differences in selected soil physical properties among the test plots at the beginning of the study. As the intensity of utilisation decreased, the values of P, SOM, and P n increased and ρ d , ρ z and θ CMC decreased. Within 5-10 years of the beginning of the study, average values were: P at UC = 70, C1 = 69, C2 = 67%; SOM at UC = 10.7, C1 = 10.6, C2 = 10.0%; ρ d at UC = 0.76, C1 = 0.79, C2 = 0.84 g/cm 3 ; ρ z at UC = 2.53, C1 = 2.55, C2 = 2.56 g/cm 3 ; θ CMC at UC = 50, C1 = 53, C2 = 51%; P n at UC = 21, C1 and C2 = 16%. Moderate negative dependence of both ρ z and ρ d on SOM and of ρ d on P n and a moderate positive dependence of P on SOM was observed. θ CMC changes did not show links to other soil physical properties. The greatest looseness of the top soil layer, expressed by a decrease in ρ d , occurred with the UC regime in direct correlation with SOM, P n and P.

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“…Non-tillage practices evidentially improve the soil aggregation, opposite to the tillage management practices (Olchin et al 2008). The soil aggregates stability decreases in soils under annual crops (Angers et al 1999), continuous tillage, and arable crop production (Eynard et al 2006).…”

mentioning

confidence: 92%

Influence of terrain attributes and soil properties on soil aggregate stability

Zádorová¹,

Jakšík²,

Kodešová³

et al. 2011

Soil Water Res.

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Abstract:The study on the relationship between the soil aggregates stability assessed using water stable aggregate (WSA) index and the selected terrain and soil properties was performed on a morphologically diverse study site in Chernozem soil region of Southern Moravia. Soil analyses and detailed digital elevation model processing were the main methods adopted in the study. The soil structure stability is negatively influenced by the soil material removal from the steep parts of the back-slope and re-deposition of the mineral loess material at the base of the slope. The highest aggregates stability was identified in the upper flat parts of the study plot, undisturbed by erosion processes, and at the concave parts of the back-slope with intensive accumulation of organic matter. Statistical analysis showed a significant dependence of aggregates stability on organic carbon content and plan curvature index.

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Effects of aggregate structure and organic C on wettability of Ustolls

Cited by 63 publications

References 35 publications

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Effect of cutting regime on soil physical properties of wet thistle meadows

Influence of terrain attributes and soil properties on soil aggregate stability

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