Effects of organic matter on the physical and the physicochemical properties of an illitic soil

Malkawi, Abdallah I. Husein; Alawneh, Ahmed Shlash; Abu-Safaqah, Osama Tahseen

doi:10.1016/s0169-1317(99)00003-4

Cited by 98 publications

(24 citation statements)

References 7 publications

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“…Another explanation may emphasize the importance of soil OM. Husein Malkawi et al (1999) found that low organic content (<15%) reduced aggregation of soil particles. Smaller soil particles form smaller interstitial pores, thereby reducing optimum moisture‐holding potential.…”

Section: Discussionmentioning

confidence: 98%

Effects of Mulch on Seedlings and Soil on a Closed Landfill

Athy

Keiffer

Stevens

2006

Restoration Ecology

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Landfills are ideal locations for short-rotation forestry, tree-based bioremediation, and wildlife habitat reconstruction. However, tree survival is reduced by harsh growing conditions and poor soil quality. This study was designed to determine survival of tree seedlings and test effects of different mulch types and depths on edaphic properties and herb emergence on a closed Ohio landfill. In spring 2002, five species of hardwood tree seedlings (Fraxinus pennsylvanica, Robinia pseudoacacia, Prunus serotina, Quercus macrocarpa, and Populus sp.) were planted in a clustered fashion on 35 plots. Each plot received a mulch treatment consisting of one type of mulch (hardwood, leaf, or mixed) at a specific depth (5 or 15 cm) or was designated as a nonmulched control. The status of each seedling and edaphic qualities (soil moisture, temperature, and nutrients) were recorded for two growing seasons. Aboveground herbaceous biomass was sampled at the end of each growing season. We found that survival and growth were species dependent. At the conclusion of the experiment, Fraxinus had the highest survival rate (70%) and Prunus the lowest (7%). The use of leaf mulch (15 cm deep) increased organic matter and various edaphic properties (cation exchange capacity, P, Mg) after the second growing season. Mulch treatments did not significantly affect aboveground herbaceous biomass when compared to nonmulched controls. These results suggest Fraxinus as a good candidate for landfill plantings. Additionally, leaves and yard waste are plentiful and could quickly enrich poor soils on a landfill if left to decompose aboveground.

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Section: Discussionmentioning

confidence: 98%

Effects of Mulch on Seedlings and Soil on a Closed Landfill

Athy

Keiffer

Stevens

2006

Restoration Ecology

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“…At a low dose of OM, an opposite effect was observed: bulk density increased and structural stability decreased. This opposite effect can be explained by the high calcium content and physical interactions between stable OM, calcium and soil [10,54,55] that decreased the stability of initial soil aggregates when they were mixed with OM and water.…”

Section: Effects Of Organic Product and Dose On Organic Carbon Contenmentioning

confidence: 99%

Effect of Three Types of Exogenous Organic Carbon on Soil Organic Matter and Physical Properties of a Sandy Technosol

et al. 2018

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Technosols made by covering agricultural soils with coastal sediments need additional organic matter (OM) to be suitable for agricultural use. Climate change will likely increase the frequency and intensity of droughts in several areas. The choice of the nature and quantity of OM to add depends on dose-response curves for soil quality. This study quantifies the influence of three contrasting organic materials (vermicompost (VF), green waste compost (GWC) and dairy manure (DM)) on four soil properties: soil organic carbon, evaporation rate, bulk density and structural stability. Soil was sampled in April and May 2014 in an artificial crop field of the vegetable production basin of Mont Saint-Michel (France) made with sediments from the bay of Mont Saint-Michel in 2013. Increasing the dose of OM increased soil organic carbon from 10 to 45 g C kg −1 dry soil and increased the porosity and the structural stability, thus decreasing compaction. Increasing the dose of OM also decreased the evaporation rate. VF and DM had similar effects, while those of GWC were weaker. Compared to DM, VF had greater biological stability. Therefore, high OM inputs along with soil decompaction can increase drought resistance by increasing rooting depth and water retention.

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“…4.5: 1990. The lower the organic matter content and, conversely, the higher the clay content of the soil, the higher the PI (Hartmann and De Boodt 1974;De La Rosa 1979;Husein Malkawi et al 1999). The plasticity of the soil samples was further determined using the unified soil classification system (USCS) plasticity chart, which also enabled further classification of the fine material.…”

Section: Laboratory Analysesmentioning

confidence: 99%

A characterisation of the physical properties of soil and the implications for landslide occurrence on the slopes of Mount Elgon, Eastern Uganda

2011

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Soil properties of major landslides that occurred recently on the mid-altitude slopes of Mount Elgon, eastern Uganda were analysed. A mudflow, located at the Kitati protected forest site, and two deep debris flows on the Nametsi and Buwabwala deforested steep slopes (36°-58°) were surveyed. In order to test the hypothesis that 'soils at the landslide sites are particularly 'problem soils' and thus prone to landslides', the following analyses were undertaken: particle size distribution, Atterberg limits, shear strength and factor of safety (F s ). Soils at the Kitati and Buwabwala sites exhibited expansive potential, owing to clay contents well above 20%. A clay content exceeding 32% was identified at the Nametsi debris flow site implying an extremely high expansive potential of the soil. High liquid limits (LLs) at Kitati (59%) and Buwabwala (53%) meant that the soils qualified as vertisols susceptible to landslides. High plasticity indices (PIs) (averaging 33%) also confirmed the vertic nature of soils at the Nametsi debris flow site. Whereas the value of F s \ 1 for the Kitati site signifies an inherently unstable slope, Nametsi and Buwabwala are supposedly stable slopes (F s [ 1). Despite this finding, the stable sites could be described as only conditionally stable because of the interplay of various physical, pedological and anthropogenic factors. The results point to the fact that soils at the landslide sites are inherently 'problem soils' where slope failure can occur even without human intervention. Therefore, the hypothesis that soils at three landslide sites are inherently 'problem soils' and prone to landslides, is accepted.

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Effects of organic matter on the physical and the physicochemical properties of an illitic soil

Cited by 98 publications

References 7 publications

Effects of Mulch on Seedlings and Soil on a Closed Landfill

Effects of Mulch on Seedlings and Soil on a Closed Landfill

Effect of Three Types of Exogenous Organic Carbon on Soil Organic Matter and Physical Properties of a Sandy Technosol

A characterisation of the physical properties of soil and the implications for landslide occurrence on the slopes of Mount Elgon, Eastern Uganda

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