The impact, identification and management of dispersive soils in rainfed cropping systems

Page, Kathryn; Dang, Yash P.; Dalal, Ram C.; Kopittke, Peter M.; Menzies, Neal W.

doi:10.1111/ejss.13070

Cited by 14 publications

(3 citation statements)

References 131 publications

(197 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most cyanobacteria thrive in neutral to alkaline soils, with an optimal pH of 7.5 to 10, which means that arid soils can be inoculated with specific cyanobacteria strains for soil improvement and plant growth [97]. Water movement and subsequent crop root growth can be enhanced by cultivating perennial plants with deep roots that are tolerant of saline soil [98]. Reduced soil pH and enhanced CaCO 3 dissolution from increased root respiration can also contribute to higher soil Ca levels.…”

Section: Salinitymentioning

confidence: 99%

Soil Constraints in an Arid Environment—Challenges, Prospects, and Implications

et al. 2023

Self Cite

View full text Add to dashboard Cite

Climate models project that many terrestrial ecosystems will become drier over the course of this century, leading to a drastic increase in the global extent of arid soils. In order to decrease the effects of climate change on global food security, it is crucial to understand the arid environment and the constraints associated with arid soils. Although the effects of aridity on aboveground organisms have been studied extensively, our understanding of how it affects soil processes and nutrient cycling is lacking. One of the primary agricultural constraints, particularly in arid locations, is water scarcity, due to which arid soils are characterized by sparse vegetation cover, low soil organic carbon, poor soil structure, reduced soil biodiversity, and a high rate of soil erosion via wind. Increased aridity will limit the availability of essential plant nutrients and crop growth, and subsequently pose serious threats to key ecological processes and services. The increasing rate of soil salinization is another major environmental hazard that further limits the agricultural potential of arid soils. These soil constraints can be ameliorated and the crop yields increased through case-specific optimization of irrigation and drainage management, enhancing the native beneficial soil microbes, and combinations of soil amendments, conditioners, and residue management. This review explores technologies to ameliorate soil constraints and increase yields to maintain crop output in arid soils.

show abstract

Section: Salinitymentioning

confidence: 99%

Soil Constraints in an Arid Environment—Challenges, Prospects, and Implications

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…High levels of exchangeable Na can lead to soil dispersion, reducing water infiltration and aeration. Exchangeable Na can also be toxic to plants, especially at high concentrations [ 9 , 87 , 88 ]. The study results suggest that increased Ca 2+ concentration effectively decreases exchangeable Na in the soil [ 89 , 90 ].…”

Section: Resultsmentioning

confidence: 99%

Elucidating Amendment Resources for Reclaiming Efficacy of Sodic Soils around Abaya and Chamo Lakes, South Ethiopia Rift Valley

Walche,

Haile,

Kiflu

et al. 2024

Toxics

View full text Add to dashboard Cite

Background: Sodic soils are harmful to agricultural and natural environments in Ethiopia’s semi-arid and arid regions, leading to soil degradation and reduced productivity. This study investigated how amendment resources could help improve the chemical properties of sodic soils around the Abaya and Chamo Lakes in the South Ethiopia Rift Valley. Methods: A factorial experiment was conducted to study the effects of gypsum (GYP) and farmyard manure (FYM) on sodic soil reclamation. The experiment had four levels of GYP (0, 50, 100, and 150%) and four levels of FYM (0, 10, 20, and 30 tons ha−1), with three replications. The pots were incubated for three months and leached for one month, after which soil samples were collected and analyzed for chemical properties. ANOVA was performed to determine the optimal amendment level for sodic soil reclamation. Results: The study found that applying 10 ton FYM ha−1 and gypsum at 100% gypsum required (GR) rate resulted in a 99.8% decrease in exchangeable sodium percentages (ESP) compared to untreated composite sodic soil and a 1.31% reduction over the control (GYP 0% + FYM 0 ton ha−1). As a result, this leads to a decrease in soil electrical conductivity, exchangeable sodium (Ex. Na), and ESP values. The results were confirmed by the LSD test at 0.05. It is fascinating to see how different treatments can have such a significant impact on soil properties. The prediction models indicate that ESP’s sodic soil treatment effect (R2 = 0.95) determines the optimal amendment level for displacing Ex. Na from the exchange site. The best estimator models for ESP using sodic soil treatment levels were ESP = 1.65–0.33 GYP for sole gypsum application and ESP = 1.65–0.33 GYP + 0.28 FYM for combined GYP and FYM application, respectively. Conclusion: The study found that combined GYP and FYM applications reduced ESP to less than 10% in agriculture, but further research is needed to determine their effectiveness at the field level.

show abstract

“…A series of soil instability problems will then be triggered in a chain manner. According to statistics, from 2000 to 2015, the distribution area of dispersive soil worldwide increased from about 420 million ha to about 618 million ha (Page et al, 2021). Internal erosion (Vakili et al, 2018), piping in dams (Bernatek‐Jakiel & Poesen, 2018; Masoodi et al, 2019; Richards & Reddy, 2007) and contact erosion of pavement embankment (Premkumar et al, 2016; Vakili et al, 2020) are typical failure modes that dispersive soil caused to engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Feature and mechanism analysis of dispersive soil disintegration impacted by soil water content, density, and salinity

Han

Wang

2023

European J Soil Science

View full text Add to dashboard Cite

Dispersive soil has caused innumerable water‐induced erosion failures of earthen structures in arid regions up to now, among which disintegration, as the first response process, is commonly deemed as the primary inducement but with inadequate understanding. In this study, the disintegration characteristics of a compacted dispersive lean clay with sand were investigated by carrying out laboratory disintegration tests under a water immersion regime. Soil mass water content (ω), dry density (ρd) and total soluble salt content (η) were considered. Results suggest that for dispersive soil, (1) the disintegration process exhibited two distinct modes, which was divided by the ω near the optimum water content; (2) higher ρd delayed disintegration monotonously; (3) increasing η first weakened and then enhanced the disintegration, in which pattern the η at the inflection point increased with increasing ρd, showing a density dependence. Evolutions of representative soil morphology were illustrated. More importantly, the underlying influential mechanism of ω and η to disintegration were elaborated emphatically: (1) the initial clay dispersion level, soil consistency change, and conceptual “constraint force” exerted by soil matric suction jointly determine the disintegration modes; (2) increasing η makes the soil pore solution concentration higher and microstructure simpler, competition between the two leads to nonmonotonic change patterns of disintegration completion time (Td) and defined velocity (Vd); the interactive effect of ρd and η manifests that η produces an additional influence on the base of microstructure created by ρd. Finally, the grey relation entropy analysis was introduced to evaluate the contributions of the three test variables to Td and Vd. The obtained results and proposed perspectives are expected to be conducive to a deeper comprehension of the same or relevant behaviours of dispersive soils in the presence of water, so as to provide new insights for the targeted prevention and control of dispersive soil catastrophes. Highlights Disintegration of dispersive soil shows two distinct water content‐dependent modes. Soil salinity has a two phase impact on disintegration of dispersive soil. Dry density and soil salinity interact affecting disintegration. Relationship between soil dispersion and disintegration is elaborated.

show abstract

The impact, identification and management of dispersive soils in rainfed cropping systems

Cited by 14 publications

References 131 publications

Soil Constraints in an Arid Environment—Challenges, Prospects, and Implications

Soil Constraints in an Arid Environment—Challenges, Prospects, and Implications

Elucidating Amendment Resources for Reclaiming Efficacy of Sodic Soils around Abaya and Chamo Lakes, South Ethiopia Rift Valley

Feature and mechanism analysis of dispersive soil disintegration impacted by soil water content, density, and salinity

Contact Info

Product

Resources

About