Search Results - "Powlson, D S"

Soil carbon sequestration to mitigate climate change: a critical re-examination to identify the true and the false by Powlson, D.S, Whitmore, A.P, Goulding, K.W.T

“…The term ‘carbon sequestration' is commonly used to describe any increase in soil organic carbon (SOC) content caused by a change in land management, with the…”
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Soil management in relation to sustainable agriculture and ecosystem services by Powlson, D.S., Gregory, P.J., Whalley, W.R., Quinton, J.N., Hopkins, D.W., Whitmore, A.P., Hirsch, P.R., Goulding, K.W.T.

“…► We review soil issues relevant to global food security and ecosystem functioning. ► We suggest actions for each issue including policies, communication or…”
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Carbon sequestration in European soils through straw incorporation: Limitations and alternatives by Powlson, D.S., Riche, A.B., Coleman, K., Glendining, M.J., Whitmore, A.P.

“…We compared alternate uses of cereal straw (4.25 t dry matter ha −1 containing 1.7 t carbon (C)) for their effectiveness in relation to climate change…”
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Is UK biofuel supply from Miscanthus water-limited by Richter, G.M, Riche, A.B, Dailey, A.G, Gezan, S.A, Powlson, D.S

“…Sustainable Miscanthus plantings encouraged under publicly funded schemes should be based on sound economic and environmental assessments. We developed an…”
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Statistical Analysis of Published Carbon‐13 CPMAS NMR Spectra of Soil Organic Matter by Mahieu, N., Randall, E. W., Powlson, D. S.

“…We have collected solid‐state 13C nuclear magnetic resonance (NMR) data from the published literature (76 papers) and from our own results on 311 whole soils,…”
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Free and intra-aggregate organic matter as indicators of soil quality change in volcanic soils under contrasting crop rotations by Zagal, E., Córdova, C., Sohi, S. P., Powlson, D. S.

“…Soil physical fractionation techniques may provide indicators of changing soil organic carbon (SOC) content; however, they have not been widely tested on…”
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Nitrate accumulation in soil profiles under seasonally open 'sunlight greenhouses' in northwest China and potential for leaching loss during summer fallow by Zhou, J.-B, Chen, Z.-J, Liu, X.-J, Zhai, B.-N, Powlson, D.S

“…Production of vegetables in greenhouses, having three solid walls and heated mainly or entirely by sunlight ('sunlight greenhouses'), has expanded greatly in…”
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Global nitrogen budgets in cereals: A 50-year assessment for maize, rice and wheat production systems by Ladha, J. K., Tirol-Padre, A., Reddy, C. K., Cassman, K. G., Verma, Sudhir, Powlson, D. S., van Kessel, C., de B. Richter, Daniel, Chakraborty, Debashis, Pathak, Himanshu

“…Industrially produced N-fertilizer is essential to the production of cereals that supports current and projected human populations. We constructed a top-down…”
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use of cover crops in cereal-based cropping systems to control nitrate leaching in SE England by Macdonald, A.J, Poulton, P.R, Howe, M.T, Goulding, K.W.T, Powlson, D.S

“…Field experiments were done to evaluate the extent to which cover crops can be used to help farmers comply with current legislation on nitrate leaching from…”
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Pedotransfer functions for estimating total soil nitrogen up to the global scale by Glendining, M. J., Dailey, A. G., Powlson, D. S., Richter, G. M., Catt, J. A., Whitmore, A. P.

“…Realistic model representation of the dynamics of terrestrial ecosystems, including all relevant biophysical and biogeochemical interactions, is a prerequisite…”
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Impact of land management practices on high-affinity methanotrophic bacterial populations: evidence from long-term sites at Rothamsted by Maxfield, P.J, Brennand, E.L, Powlson, D.S, Evershed, R.P

“…The impacts of land-use change and long-term agricultural practices on the bacterial and methanotrophic biomass in the soils comprising the Classical…”
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Biofuels and other approaches for decreasing fossil fuel emissions from agriculture by Powlson, D.S, Riche, A.B, Shield, I

“…Summary Biofuels offer one method for decreasing emissions of carbon dioxide (CO2) from fossil fuels, thus helping to meet UK and EU targets for mitigating…”
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Turnover of nitrogen-15-labeled fertilizer in old grassland by Jenkinson, D.S, Poulton, P.R, Johnston, A.E, Powlson, D.S

“…In this paper we follow the fate of single applications of 15N-labeled fertilizer to old grassland, over a period of nearly 20 yr. In 1980 and 1981,…”
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The potential to increase soil carbon stocks through reduced tillage or organic material additions in England and Wales: A case study by Powlson, D.S., Bhogal, A., Chambers, B.J., Coleman, K., Macdonald, A.J., Goulding, K.W.T., Whitmore, A.P.

“…► Scope for increasing UK SOC by reduced tillage at best 310 ± 180 kg C ha −1 yr −1. ► Potential sequestration from added OM largely limited by availability…”
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Revised estimates of the carbon mitigation potential of UK agricultural land by Smith, P., Milne, R., Powlson, D.S., Smith, J.U., Falloon, P., Coleman, K.

“… The soil sequestration components of recent estimates of the carbon mitigation potential of UK agricultural land were calculated on the basis of a percentage…”
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The effect of microbial activity on soil water diffusivity by Choudhury, B. U., Ferraris, S., Ashton, R. W., Powlson, D. S., Whalley, W. R.

“…In this study, we explored the effects of microbial activity on the evaporation of water from cores of a sandy soil under laboratory conditions. We applied…”
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The effect of organic carbon content on soil compression characteristics by Suravi, K.N., Attenborough, K., Taherzadeh, S., Macdonald, A.J., Powlson, D.S., Ashton, R.W., Whalley, W.R.

“…•Compression index, from drained triaxial compression, is independent of SOC.•Reported effects of SOC on compression may be due to soil hydraulic effect.•Void…”
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Potassium content in soil, uptake in plants and the potassium balance in three European long-term field experiments by Blake, L. (IACR-Rothamsted, Harpenden, Herts. (United Kingdom). Soil Science Dept.), Mercik, S, Koerschens, M, Goulding, K.W.T, Stempen, S, Weigel, A, Poulton, P.R, Powlson, D.S

“…This study quantitatively assesses the fate of K derived from mineral fertilizers and organic manures and the effective K balance in three long-term field…”
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Meeting the UK's climate change commitments: options for carbon mitigation on agricultural land by Smith, P., Powlson, D.S., Smith, J.U., Falloon, P., Coleman, K.

“… Under the Kyoto Protocol, the European Union is committed to an 8% reduction in CO2 emissions, compared to baseline (1990) levels, during the first…”
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Phosphorus content in soil, uptake by plants and balance in three European long-term field experiments by Blake, L, Mercik, S, Koerschens, M, Moskal, S, Poulton, PR, Goulding, KWT, Weigel, A, Powlson, D S

“…The fate of phosphorus (P) derived from mineral fertilisers and organic manures, and the effective P balance, have been assessed in three long-term field…”
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