Aggregate Stability and Water Retention Near Saturation Characteristics as Affected by Soil Texture, Aggregate Size and Polyacrylamide Application

Mamedov, A. I.; Huang, Chi‐hua; Alıev, Fazil; Levy, Guy J.

doi:10.1002/ldr.2509

Cited by 52 publications

(30 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher concentration of EC may be due to the influence of inorganic fertilizers (NPK), which are applied in higher amounts in orchards as compared to croplands by local farmers to achieve maximum yields ( Table 3). The results are supported by numerous researchers [11,18,32,33] that have demonstrated that cultivated land has a higher EC compared to grassland and abandoned land, possibly due to the presence of soil fauna and flora and the high amount of SOM. The data recorded at sampling time showed that farmers applied high doses of NPK fertilizers in the field (Table 3), which might be the result in higher concentrations of EC in CAO compared to the other sites.…”

Section: Physicochemical Properties Of the Soil In The Different Landsupporting

confidence: 77%

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

Kalhoro

Chen

et al. 2017

Sustainability

View full text Add to dashboard Cite

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.

show abstract

Section: Physicochemical Properties Of the Soil In The Different Landsupporting

confidence: 77%

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

Kalhoro

Chen

et al. 2017

Sustainability

View full text Add to dashboard Cite

show abstract

“…In both studies, the higher PAM rates, 100 kg ha −1 [39] and 20 kg ha −1 [38], were less effective, as compared to lower and medium rates. This could be that the amount of rainfall applied in these storms was insufficient to completely dissolve PAM at higher rates, as higher rates require a large volume of water for effective dissolution [34].…”

Section: Introductionmentioning

confidence: 82%

“…Different treatments are control (C), polyacrylamide (PAM) of 20 kg ha −1 (P20), 40 kg ha −1 (P40), 60 kg ha −1 (P60), PAM of 40 kg ha −1 + gypsum (4t ha −1 ) (P+G), gypsum (4t ha −1 ) (G), lime (2t ha −1 ) (L), and PAM of 40 kg ha −1 + Lime (2t ha −1 ) (P+L). Aggregate (structure) stability with three replications (taken from upper 5 mm of the soil in each box) was determined using the modified high energy moisture characteristics (HEMC) method [38,50]. In this method, soil aggregates are wetted rapidly in a controlled manner, and a moisture content curve, at a matric potential range of 0-50 cm, corresponding to drainable pores of >60 µm, with small steps of 1-2 cm, was generated using a hanging water column.…”

Section: Soil Physico-chemical Properties and Aggregate Stability Detmentioning

confidence: 99%

Effectiveness of Polyacrylamide in Reducing Runoff and Soil Loss under Consecutive Rainfall Storms

et al. 2020

Self Cite

View full text Add to dashboard Cite

The use of anionic polyacrylamide (PAM) as a soil conditioner could help prevent soil loss by water. In this study, we determined the effective granular PAM rate that best reduces runoff and soil loss from Oxisols. Furthermore, the effectiveness of the selected PAM rate was tested by applying it in a mixture with gypsum (G) or lime (L). The study was conducted in two phases: (i) Dry PAM rates of 0 (C), 20 kg ha −1 (P20), 40 kg ha −1 (P40), and 60 kg ha −1 (P60) were applied onto soil surface and run for six consecutive rainfall storms of 70 mm h −1 intensity for 1 h duration, and the effective PAM rate was selected; and (ii) G (4 t ha −1 ) or L (2 t ha −1 ) were applied alone or mixed with the selected PAM rate. The P20 was found to be effective in reducing runoff in the beginning while P40 and P60 were more effective starting from the third storm through the end of the consecutive storms, but with no statistically significant difference between P40 and P60. Hence, P40 was selected as the most suitable rate for the given test soil and rainfall pattern. On the other hand, the mixed application of P40 with G or L increased infiltration rate (IR) in the first two storms through improving soil solution viscosity. However, effectiveness of the mixtures had diminished by various degrees as rain progressed, as compared to P40 alone, which could be attributed to the rate and properties of G and L. In conclusion, the variation in effectiveness of PAM rates in reducing runoff with storm duration could indicate that the effective rates shall be selected based on the climatic region in that lower rates for the short rains or higher rates for elongated rains. Moreover, combined application of PAM with L could offer a good option to both fairly reduce soil erosion and improve land productivity especially in acidic soils like Oxisols, which requires further field verification.

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Aggregate Stability and Water Retention Near Saturation Characteristics as Affected by Soil Texture, Aggregate Size and Polyacrylamide Application

Cited by 52 publications

References 49 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)

Effectiveness of Polyacrylamide in Reducing Runoff and Soil Loss under Consecutive Rainfall Storms

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

Contact Info

Product

Resources

About