Compressive behaviour of the soil in buffer zones under different management practices in Finland

Räty, Mari; Horn, Rainer; Rasa, Kimmo; Yli‐Halla, Markku; Pietola, Liisa

doi:10.2137/145960610791542370

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…Dense aboveground vegetation and belowground root systems in a VBS first remove P from overland flow by deposition and infiltration. Aboveground vegetation in the VBS reduces flow velocity of surface water, available energy for particulate transfer and increases hydraulic roughness [104,105], whereas below-ground root systems increase soil permeability and porosity while increasing infiltration of overland water flow [106,107].…”

Section: Vegetative Buffersmentioning

confidence: 99%

Managing Phosphorus Loss from Agroecosystems of the Midwestern United States: A Review

et al. 2020

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Best management practices (BMPs) are site-specific and their implementation, long-term management, and maintenance are important for successful reduction of phosphorus (P) loss into headwater streams. This paper reviews published research on managing P loss from agricultural cropping systems in the Midwestern United States and classified the available research based on BMPs and their efficacy in reducing P loss. This review paper also identifies the areas where additional research could provide insight for managing P losses. Our literature review shows that cover crops, reduced tillage, saturated buffers, and constructed wetlands are the most evaluated areas of current research. However, additional research is necessary on the site-specific area to measure the effectiveness of BMPs in managing P loss. The BMPs that serve as a sink of P need further evaluation in long-term field-scale trials. Studies evaluating adsorption and desorption mechanisms of P in surface and subsurface soils with materials or amendments that bind P in the soil are needed. The time required and pathways, where the flush of available P is lost or fixed in the soil matrix, need further investigation. Measured P loss from BMPs like bioreactors and saturated buffers supplemented with P adsorption materials or filters need to be simulated with models for their prediction and validation. Field evaluations of P index and critical source area concepts should be investigated for identifying problematic areas in the watersheds. Identification of overlapping areas of high P source and transport can help in strategic planning and layout, thereby resulting in reducing the cost of implementing BMPs at field and watershed scales.

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Section: Vegetative Buffersmentioning

confidence: 99%

Managing Phosphorus Loss from Agroecosystems of the Midwestern United States: A Review

et al. 2020

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“…Even so, P associated with clay and colloidal‐sized fractions may not be deposited (Owens et al, 2007; Syversen and Borch, 2005). Denser root systems in VBSs encourage infiltration during infiltration excess overland flow by increasing the permeability and porosity of the soil (Cooper et al, 1995; Räty et al, 2010a; Zaimes et al, 2008). Infiltration, encouraged by the reduction in flow velocity mentioned above, increases contact time of DP with soil surfaces and the rhizosphere.…”

Section: Conceptual Model Of Vegetated Buffer Strip Functioningmentioning

confidence: 99%

Phosphorus Retention and Remobilization in Vegetated Buffer Strips: A Review

2012

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Diff use pollution remains a major threat to surface waters due to eutrophication caused by phosphorus (P) transfer from agricultural land. Vegetated buff er strips (VBSs) are increasingly used to mitigate diff use P losses from agricultural land, having been shown to reduce particulate P transfer. However, retention of dissolved P (DP) has been lower, and in some cases VBSs have increased delivery to surface waters. Th e aims of this review were (i) to develop a conceptual model to enhance the understanding of VBS functioning in terms of DP, (ii) to identify key processes within the model that aff ect DP retention and delivery, and (iii) to explore evidence for the controls on these processes. A greater understanding in these areas will allow the development of management strategies that enhance DP retention. We found evidence of a surface layer in buff er strip soils that is enriched in soluble P compared with adjacent agricultural land and may be responsible for the reported increased DP delivery. Th rough increased biological activity in VBSs, plants and microorganisms may assimilate P from particulates retained in the VBSs or native soil P and remobilize this P in a more soluble form. Th ese conclusions are based on a limited amount of research, and a better understanding of biogeochemical cycling of P in buff er strip soils is required.

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“…In the present study, soil at the grazed site was subject to individual hoof pressure of ca. 125 kPa (Räty et al ., ). Consequently, significantly smaller bulk density in the surface horizon of the natural and harvested sites than at the grazed site indicates soil compaction at the latter site.…”

Section: Discussionmentioning

confidence: 97%

Structure and hydraulic properties of the boreal clay soil under differently managed buffer zones

Rasa

Horn

2013

Soil Use and Management

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Vegetated buffer zones (BZs) between arable fields and bodies of water are commonly established to reduce erosion and run‐off of particle‐bound nutrients. Functioning of a BZ depends on soil structure, as it is important for water infiltration. Therefore, it is vital to understand how varying management practices affect soils of BZs. We studied the structural and hydraulic properties of three differently managed BZs established in a boreal Vertic Stagnic Cambisol (clay, 51%). The three management practices for vegetation were as follows: natural with no treatment, harvested yearly and grazed by cattle. We used bulk density and macroporosity, together with a pore geometry index (air permeability per unit air‐filled porosity), to describe the soil structural properties. Hydraulic properties were measured at different length scales by means of an aggregate sorptivity test, saturated hydraulic conductivity of the core samples and field‐saturated hydraulic conductivity. Vegetation management markedly affected the physical properties in the top 5 cm of the soil. Properties were least favourable for infiltration at the grazed site, with the greatest bulk density, least macroporosity and hydraulic conductivity or greatest pore tortuosity. In general, spatial variation in zones with restricted and good hydraulic conductivity together with reduced aggregate sorptivity in the deeper horizons made the soil prone to preferential flow when initially dry. Prolonged wetness, on the other hand, reduced saturated hydraulic conductivity significantly, resulting in surface run‐off. Harvesting was considered the best management practice due to its inherent capacity for reducing the soil nutrient content and because it has minor implications for soil physical properties.

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Compressive behaviour of the soil in buffer zones under different management practices in Finland

Cited by 9 publications

References 32 publications

Managing Phosphorus Loss from Agroecosystems of the Midwestern United States: A Review

Managing Phosphorus Loss from Agroecosystems of the Midwestern United States: A Review

Phosphorus Retention and Remobilization in Vegetated Buffer Strips: A Review

Structure and hydraulic properties of the boreal clay soil under differently managed buffer zones

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