Search Results - "Hallett, P D"

Root elongation, water stress, and mechanical impedance: a review of limiting stresses and beneficial root tip traits by Bengough, A. Glyn, McKenzie, B.M, Hallett, P.D, Valentine, T.A

“…Root elongation in drying soil is generally limited by a combination of mechanical impedance and water stress. Relationships between root elongation rate,…”
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Plant exudates improve the mechanical conditions for root penetration through compacted soils by Oleghe, E., Naveed, M., Baggs, E. M., Hallett, P. D.

“…Background and aim Plant exudates greatly affect the physical behaviour of soil, but measurements of the impact of exudates on compression characteristics are…”
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Surface tension, rheology and hydrophobicity of rhizodeposits and seed mucilage influence soil water retention and hysteresis by Naveed, M., Ahmed, M. A., Benard, P., Brown, L. K., George, T. S., Bengough, A. G., Roose, T., Koebernick, N., Hallett, P. D.

“…Aims Rhizodeposits collected from hydroponic solutions with roots of maize and barley, and seed mucilage washed from chia, were added to soil to measure their…”
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Impact of root hairs on microscale soil physical properties in the field by Marin, M., Hallett, P. D., Feeney, D. S., Brown, L. K., Naveed, M., Koebernick, N., Ruiz, S., Bengough, A. G., Roose, T., George, T. S.

“…Aims Recent laboratory studies revealed that root hairs may alter soil physical behaviour, influencing soil porosity and water retention on the small scale…”
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Effect of root age on the biomechanics of seminal and nodal roots of barley (Hordeum vulgare L.) in contrasting soil environments by Loades, K. W, Bengough, A. G, Bransby, M. F, Hallett, P. D

“…BACKGROUND AND AIMS: The biomechanics of root systems influence plant lodging resistance and soil structural stabilisation. Tissue age has the potential to…”
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Biomechanics of nodal, seminal and lateral roots of barley: effects of diameter, waterlogging and mechanical impedance by Loades, K. W., Bengough, A. G., Bransby, M. F., Hallett, P. D.

“…Background and aims Biomechanical properties of cereal root systems largely control both resistance to root lodging and their ability to stabilise soil…”
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Rheological stabilization of wet soils by model root and fungal exudates depends on clay mineralogy by Barré, P, Hallett, P.D

“…Changes in soil rheological behaviour by a root mucilage analogue (polygalacturonic acid, PGA) and a fungal polysaccharide (scleroglucan) were studied for a…”
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Arable plant communities as indicators of farming practice by Hawes, C., Squire, G.R., Hallett, P.D., Watson, C.A., Young, M.

“…The diversity and abundance of the within-field seedbank and emerged weed flora, were measured in over 100 fields from conventional, integrated and organic…”
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Physical response of rigid and non-rigid soils to analogues of biological exudates by Peng, X., Hallett, P. D., Zhang, B., Horn, R.

“…Exudates produced by plants and microorganisms can alter greatly the physical behaviour of soil. There is limited research that quantifies directly the…”
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Investigating the effects of anaerobic and aerobic post-treatment on quality and stability of organic fraction of municipal solid waste as soil amendment by Abdullahi, Y.A., Akunna, J.C., White, N.A., Hallett, P.D., Wheatley, R.

“…The use of OFMSW for biogas and compost production is considered as a sustainable strategy in saving valuable landfill space while producing valuable product…”
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Centrifuge modelling of soil slopes containing model plant roots by SONNENBERG, R, BRANSBY, M. F, BENGOUGH, A. G, HALLETT, P. D, DAVIES, M. C. R

“…A series of centrifuge model tests were conducted to investigate the contribution of root reinforcement to slope stability. A compacted sandy clay slope,…”
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Integrating soil quality changes to arable agricultural systems following organic matter addition, or adoption of a ley-arable rotation by Griffiths, B.S., Ball, B.C., Daniell, T.J., Hallett, P.D., Neilson, R., Wheatley, R.E., Osler, G., Bohanec, M.

“…To study the sustainability of arable agricultural systems we examined a wide range of biological, physical and chemical properties associated with changes in…”
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Impact of hydraulic suction history on crack growth mechanics in soil by Yoshida, S., Hallett, P. D.

“…The mechanics of crack formation and the influence of soil stress history were described using the crack tip opening angle (CTOA) measured with fractography…”
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Describing soil crack formation using elastic-plastic fracture mechanics by Hallett, P. D., Newson, T. A.

“…Summary Crack development is predominant in soil structure formation. A number of fracture mechanics models have been applied to soil to describe cracking, but…”
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Do different methods for measuring the hydrophobicity of soil aggregates give the same trends in soil amended with residue? by Cosentino, D., Hallett, P.D., Michel, J.C., Chenu, C.

“…Most soils have a low level of water repellency and several studies have shown this to be a major property underlying soil structural stability. Various…”
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Functional resilience of soil microbial communities depends on both soil structure and microbial community composition by Griffiths, B. S, Hallett, P. D, Kuan, H. L, Gregory, A. S, Watts, C. W, Whitmore, A. P

“…The effects of soil structure and microbial community composition on microbial resistance and resilience to stress were found to be interrelated in a series of…”
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Root- and microbial-derived mucilages affect soil structure and water transport by Czarnes, S., Hallett, P. D., Bengough, A. G., Young, I. M.

“…Summary The production of exudates by plant roots and microbes in the rhizosphere, together with intense wetting and drying cycles due to evapotranspiration,…”
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Subcritical Water Repellency of Aggregates from a Range of Soil Management Practices by Hallett, P.D., Baumgartl, T., Young, I.M.

“…Subcritical water repellency is a poorly acknowledged physical property of soil. It refers to soil where water uptake appears to occur readily, yet is impeded…”
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Centrifuge modelling of soil slopes reinforced with vegetation by Sonnenberg, R, Bransby, M. F, Hallett, P. D, Bengough, A. G, Mickovski, S. B, Davies, M. C.R

“…This paper reports a series of geotechnical centrifuge model tests conducted to investigate the mechanical reinforcement of slopes by vegetation. Some of the…”
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Changes to water repellence of soil aggregates caused by substrate-induced microbial activity by Hallett, P. D., Young, I. M.

“…Summary Soil microbes produce exudates which upon drying become water‐repellent, thus altering hydraulic properties. The influence of microbial activity caused…”
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