Professor Dave Chadwick
Professor of Sustainable Land Use Systems
Contact info
Environment Centre Wales,
School of Natural Sciences,
Bangor University,
Bangor,
LL57 2UW,
UK.
email: d.chadwick@bangor.ac.uk
Tel: 01248 383569
NERC Uplands-N2O project: http://uplands-n2o.bangor.ac.uk/
STARS Centre for Doctoral Training: http://www.starsoil.org.uk/
Sustainable Futures for the Costa Rica Dairy Sector (SusCoRiDa): http://suscorida.bangor.ac.uk/index.php.en
UK-China Sustainable Agriculture Innovation Network (SAIN): http://www.sainonline.org/English.html
- 2020
- Cyhoeddwyd
Global Research Alliance N2 O chamber methodology guidelines: Introduction, with health and safety considerations
de Klein, C. A. M., Harvey, M. J., Clough, T. J., Petersen, S. O., Chadwick, D. R. & Venterea, R. T., Medi 2020, Yn: Journal of Environmental Quality. 49, 5, t. 1073-1080 8 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Representing crop rotations in life cycle assessment: a review of legume LCA studies
Porto Costa, M., Chadwick, D., Saget, S., Rees, R. M., Williams, M. & Styles, D., 22 Awst 2020, Yn: International Journal of Life Cycle Assessment. 25, t. 1942–1956Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Crop residue carbon-to-nitrogen ratio regulates denitrifier N2O production post flooding
Zhou, W., Jones, D. L., Hu, R., Clark, I. M. & Chadwick, D. R., Awst 2020, Yn: Biology and Fertility of Soils. 56, 6, t. 825-838Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Image-based quanti fication of soil microbial dead zones induced by nitrogen fertilization
Ruiz, S. A., Fletcher, D. M. M., Boghi, A., Williams, K. A., Duncan, S. J., Scotson, C. P., Petroselli, C., Dias, T. G. S., Chadwick, D. R., Jones, D. L. & Roose, T., 20 Gorff 2020, Yn: Science of the Total Environment. 727, 138197.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Raising the groundwater table in the non -growing season can reduce greenhouse gas emissions and maintain crop productivity in cultivated fen peats
Wen, Y., Freeman, B., Ma, Q., Evans, C. D., Chadwick, D. R., Zang, H. & Jones, D. L., 20 Gorff 2020, Yn: Journal of Cleaner Production. 262, 121179.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Impact of water table levels and winter cover crops on greenhouse gas emissions from cultivated peat soils
Wen, Y., Zang, H., Ma, Q., Freeman, B., Chadwick, D. R., Evans, C. D. & Jones, D. L., 1 Meh 2020, Yn: Science of the Total Environment. 719, 135130.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Region-specific emission factors for Brazil increase the estimate of nitrous oxide emissions from nitrogen fertiliser application by 21%
Mancebo Mazzetto, A., Styles, D., Gibbons, J., Arndt, C., Misselbrook, T. & Chadwick, D., 1 Meh 2020, Yn: Atmospheric Environment. 230, 117506.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Farmyard manure applications stimulate soil carbon and nitrogen cycling by boosting microbial biomass rather than changing its community composition
Ma, Q., Wen, Y., Wang, D., Sun, X., Hill, P. W., Macdonald, A., Chadwick, D. R., Wu, L. & Jones, D. L., 1 Mai 2020, Yn: Soil Biology and Biochemistry. 144, 107760.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Meta-analysis of global livestock urine-derived nitrous oxide emissions from agricultural soils
Lopez-Aizpun, M., Horrocks, C. A., Charteris, A. F., Marsden, K., Ciganda, V., Evans, J. R., Chadwick, D. & Cardenas, L. M., 1 Ebr 2020, Yn: Global Change Biology. t. 2002-2013Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Use of untargeted metabolomics for assessing soil quality and microbial function
Withers, E., Hill, P. W., Chadwick, D. R. & Jones, D. L., Ebr 2020, Yn: Soil Biology and Biochemistry. 143, 107758.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Cover crops affect the partial nitrogen balance in a maize-forage cropping system
Rocha, K. F., de Souza, M., Almeida, D. S., Chadwick, D. R., Jones, D. L., Mooney, S. J. & Rosolem, C. A., 15 Chwef 2020, Yn: Geoderma. 360, 114000.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Collaboration for Sustainable Intensification: The Underpinning Role of Social Sustainability
Wynne-Jones, S., Hyland, J., Williams, P. & Chadwick, D., Ion 2020, Yn: Sociologia Ruralis. 60, 1, t. 58-82 25 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2019
- Cyhoeddwyd
Nitrification represents the bottle-neck of sheep urine patch N2O emissions from extensively grazed organic soils
Marsden, K. A., Holmberg, J. A., Jones, D. L., Charteris, A. F., Cardenas, L. M. & Chadwick, D. R., 10 Rhag 2019, Yn: Science of the Total Environment. 695, 133786.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Microbial utilization of low molecular weight organic carbon substrates in cultivated peats in response to warming and soil degradation
Wen, Y., Zang, H., Freeman, B., Musarika, S., Evans, C. D., Chadwick, D. R. & Jones, D. L., Rhag 2019, Yn: Soil Biology and Biochemistry. 139, 107629.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Implementation solutions for greenhouse gas mitigation measures in livestock agriculture: A framework for coherent strategy
Kipling, R. P., Taft, H. E., Chadwick, D. R., Styles, D. & Moorby, J., Tach 2019, Yn: Environmental Science and Policy. 101, t. 232-244Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Rye cover crop incorporation and high watertable mitigate greenhouse gas emissions in cultivated peatland
Wen, Y., Zang, H., Freeman, B., Ma, Q., Chadwick, D. R. & Jones, D. L., Hyd 2019, Yn: Land Degradation and Development. 30, 16, t. 1928-1938 11 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
China’s pig relocation in balance
Bai, Z., Jin, S., Wu, Y., Ermgassen, E. Z., Oenema, O., Chadwick, D., Lassaletta, L., Velthof, G., Zhao, J. & Ma, L., 30 Medi 2019, Yn: Nature Sustainability . 2, 10, t. 888-888 1 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Llythyr › adolygiad gan gymheiriaid
- Cyhoeddwyd
Is the ‘enzyme latch’ or ‘iron gate’ the key to protecting soil organic carbon in peatlands?
Wen, Y., Zang, H., Ma, Q., Evans, C. D., Chadwick, D. R. & Jones, D. L., 1 Medi 2019, Yn: Geoderma. 349, t. 107-113Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Just the tonic! Legume biorefining for alcohol has the potential to reduce Europe's protein deficit and mitigate climate change
Lienhardt, T., Black, K., Saget, S., Costa, M. P., Chadwick, D., Rees, R. M., Williams, M., Spillane, C., Iannetta, P. M., Walker, G. & Styles, D., Medi 2019, Yn: Environment International. 130, t. 104870Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Short-term responses of greenhouse gas emissions and ecosystem carbon fluxes to elevated ozone and N fertilization in a temperate grassland
Wang, J., Hayes, F., Hill, P. W., Chadwick, D. R., Mills, G. & Jones, D. L., 15 Awst 2019, Yn: Atmospheric Environment. 211, t. 204-213 10 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
A critical review of the impacts of cover crops on nitrogen leaching, net greenhouse gas balance and crop productivity
Abdallah, M., Hastings, A., Cheng, K., Yue, Q., Chadwick, D., Espenberg, M., Truu, J., Rees, R. M. & Smith, P., Awst 2019, Yn: Global Change Biology. 25, 8, t. 2530-2543 14 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Data for life cycle assessment of legume biorefining for alcohol
Lienhardt, T., Black, K., Saget, S., Porto Costa, M., Chadwick, D., Rees, R. M., Williams, M., Spillane, C., Iannetta, P. M., Walker, G. & Styles, D., Awst 2019, Yn: Data in Brief. 104242.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Agroecosystem resilience in response to extreme winter flooding
Harvey, R. J., Chadwick, D. R., Sánchez-Rodríguez, A. R. & Jones, D. L., 1 Gorff 2019, Yn: Agriculture, Ecosystems and Environment. 279, t. 1-13Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Application of Bayesian statistics to estimate nitrous oxide emission factors of three nitrogen fertilisers on UK grasslands
Cowan, N., Levy, P., Drewer, J., Carswell, A., Shaw, R., Simmons, I., Bache, C., Marinheiro, J., Brichet, J., Sanchez-Rodriguez, A. R., Cotton, J., Hill, P. W., Chadwick, D. R., Jones, D. L., Misselbrook, T. H. & Skiba, U., Gorff 2019, Yn: Environment International. 128, t. 362-370Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The Design and Deployment of an End-To-End IoT Infrastructure for the Natural Environment
Nundloll, V., Porter, B., Blair, G. S., Emmett, B., Cosby, J., Jones, D. L., Chadwick, D., Winterbourn, J. B., Beattie, P., Dean, G., Shaw, R., Shelley, W., Brown, M. & Ullah, I., 7 Meh 2019, Yn: Future Internet. 11, 6, 129.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Slurry acidification and anaerobic digestion affects the speciation and vertical movement of particulate and nanoparticulate phosphorus in soil after cattle slurry application
Li, Y., Jones, D. L., Chen, Q. & Chadwick, D. R., Meh 2019, Yn: Soil & Tillage Research. 189, t. 199-206 8 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Assessing the benefits and wider costs of different N fertilisers for grassland agriculture
Carswell, A., Shaw, R., Hunt, J., Rafael Sanchez-Rodriguez, A., Saunders, K., Cotton, J., Hill, P. W., Chadwick, D. R., Jones, D. L. & Misselbrook, T. H., 16 Ebr 2019, Yn: Archives of Agronomy and Soil Science . 65, 5, t. 625-639Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Nitrogen use efficiency and nitrous oxide emissions from five UK fertilised grasslands
Cardenas, L. M., Bhogal, A., Chadwick, D. R., McGeough, K., Misselbrook, T., Rees, R. M., Thorman, R. E., Watson, C. J., Williams, J. R., Smith, K. A. & Calvet, S., 15 Ebr 2019, Yn: Science of the Total Environment. 661, t. 696-710 15 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Effects of four years of elevated ozone on microbial biomass and extracellular enzyme activities in a semi-natural grassland
Wang, J., Hayes, F., Turner, R., Chadwick, D. R., Mills, G. & Jones, D. L., 10 Ebr 2019, Yn: Science of the Total Environment. 660, t. 260-268 9 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Extreme flood events at higher temperatures exacerbate the loss of soil functionality and trace gas emissions in grassland
Rafael Sanchez-Rodriguez, A., Nie, C., Hill, P. W., Chadwick, D. R. & Jones, D. L., Maw 2019, Yn: Soil Biology and Biochemistry. 130, t. 227-236Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Science to Policy: Climate-proofing grassland productivity
Wiik, E., Jones, D. L., Chadwick, D., Hill, P., Sanchez Rodriguez, A., Dodd, R., Turner, R., Kingston-Smith, A., Gwynn-Jones, D., Doonan, J., Scullion, J., Loka, D., Hayes, F., Robinson, D. & Toberman, H., Maw 2019, Ser Cymru National Research Network for Low Carbon, Energy and Environment. (Science to Policy)Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn
- Cyhoeddwyd
Accumulation and leaching of nitrate in soils in wheat-maize production in China
Lu, J., Bai, Z., Velthof, G. L., Wu, Z., Chadwick, D. & Ma, L., 1 Chwef 2019, Yn: Agricultural Water Management . 212, t. 407-415Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
What can management option uptake tell us about ecosystem services delivery through agri-environment schemes?
Arnott, D., Chadwick, D., Harris, I., Koj, A. & Jones, D. L., 1 Chwef 2019, Yn: Land Use Policy. 81, t. 194-208Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Challenges to implementing greenhouse gas mitigation measures in livestock agriculture: A conceptual framework for policymakers
Kipling, R. P., Taft, H. E., Chadwick, D. R., Styles, D. & Moorby, J., Chwef 2019, Yn: Environmental Science and Policy. 92, t. 107-115Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Impacts of abiotic stresses on the physiology and metabolism of cool-season grasses: A review
Loka, D., Harper, J., Humphreys, M., Gasior, D., Wootton-Beard, P., Gwynn-Jones, D., Scullion, J., Doonan, J., Kingston-Smith, A., Dodd, R., Wang, J., Chadwick, D., Hill, P., Jones, D., Mills, G., Hayes, F. & Robinson, D., Chwef 2019, Yn: Food and Energy Security. 8, 1, e00152.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl adolygu › adolygiad gan gymheiriaid
- Cyhoeddwyd
Typology of extreme flood event leads to differential impacts on soil functioning
Rafael Sanchez-Rodriguez, A., Hill, P. W., Chadwick, D. R. & Jones, D. L., Chwef 2019, Yn: Soil Biology and Biochemistry. 129, t. 153-168Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
What agricultural practices are most likely to deliver "sustainable intensification" in the UK?
Dicks, L., Rose, D., Ang, F., Birch, N., Boatman, N., Bowles, E., Chadwick, D., Dinsdale, A., Durham, S., Elliott, J., Firbank, L., Humphreys, S., Jarvis, P., Jones, D., Kindred, D., Knight, S., Lee, M., Leifert, C., Lobley, M., Matthews, K., Midmer, A., Moore, M., Morris, C., Mortimer, S., Murray, T., Norman, K., Ramsden, S., Roberts, D., Smith, L., Soffe, R., Stoate, C., Taylor, B., Tinker, D., Topliff, M., Wallace, J., Williams, P., Wilson, P., Winter, M. & Sutherland, W., Chwef 2019, Yn: Food and Energy Security. 8, 1, e00148.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2018
- Cyhoeddwyd
Can In-Situ Soil Nitrate Measurements Improve Nitrogen-Use Efficiency in Agricultural Systems?
Jones, D. L., Chadwick, D. R., Rengaraj, S., Wu, D., Williams, A. P., Hill, P. W., Miller, A. J., Lark, R. M., Rosolem, C. A., Damin, V. & Shaw, R., 1 Rhag 2018, Proceedings 1466-1314. International Fertiliser Society, Cyfrol 825. t. 1-32 32 t. 825Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod › adolygiad gan gymheiriaid
- Cyhoeddwyd
Interaction of straw amendment and soil NO3- content controls fungal denitrification and denitrification product stoichiometry in a sandy soil
Senbayram, M., Well, R., Bol, R., Chadwick, D. R., Jones, D. L. & Wu, D., Tach 2018, Yn: Soil Biology and Biochemistry. 126, t. 204-212Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Sheep urine patch N2O emissions are lower from extensively-managed than intensively-managed grasslands
Marsden, K., Holmberg, J., Jones, D. L. & Chadwick, D., 1 Hyd 2018, Yn: Agriculture, Ecosystems and Environment. 265, t. 264-274Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Urea-based fertilization strategies to reduce yield-scaled N oxides and enhance bread-making quality in a rainfed Mediterranean wheat crop
Guardia, G., Sanz-Cobena, A., Sanchez-Martin, L., Fuertes-Mendizabal, T., Gonzalez-Murua, C., Alvarez, J. M., Chadwick, D. & Vallejo, A., Hyd 2018, Yn: Agriculture, Ecosystems and Environment. 265, t. 421-431Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The environmental costs and benefits of high-yield farming
Balmford, A., Amano, T., Bartlett, H., Chadwick, D., Collins, A., Edwards, D., Field, R., Garnsworthy, P., Green, R., Smith, P., Waters, H., Whitmore, A., Broom, D. M., Chara, J., Finch, T., Garnett, E., Gathorne-Hardy, A., Hernandez-Medrano, J., Herrero, M., Hua, F., Latawiec, A., Misselbrook, T., Phalan, B., Simmons, B. I., Takahashi, T., Vause, J., zu Ermgassen, E. & Eisner, R., 14 Medi 2018, Yn: Nature Sustainability . 1, t. 477-485Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Composting with negative pressure aeration for the mitigation of ammonia emissions and global warming potential
Wang, X., Bai, Z., Gao, B., Chadwick, D., Qing, C., Hu, C. & Ma, L., 10 Medi 2018, Yn: Journal of Cleaner Production. 195, t. 448-457Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Repeated application of anaerobic digestate, undigested cattle slurry and inorganic fertilizer N: Impacts on pasture yield and quality
Walsh, J. J., Jones, D. L., Chadwick, D. & Williams, A., 1 Medi 2018, Yn: Grass and Forage Science. 73, t. 758-763Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The contribution of cattle urine and dung to nitrous oxide emissions: Quantification of country specific emission factors and implications for national inventories
Chadwick, D. R., Cardenas, L. M., Dhanoa, M. S., Donovan, N., Misselbrook, T., Williams, J. R., Thorman, R. E., McGeough, K. L., Watson, C. J., Watson, C. J., Bell, M., Anthony, S. G. & Rees, R. M., 1 Medi 2018, Yn: Science of the Total Environment. 635, t. 607-617Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Fertilizer regime changes the competitive uptake of organic nitrogen by wheat and soil microorganisms: An in-situ uptake test using 13C, 15N labelling, and 13C-PLFA analysis
Ma, Q., Wu, L., Wang, J., Ma, J., Zheng, N., Hill, P., Chadwick, D. & Jones, D. L., 10 Awst 2018, Yn: Soil Biology and Biochemistry. 125, t. 319-327Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Designing Vulnerable Zones of Nitrogen and Phosphorus Transfers to Control Water Pollution in China
Bai, Z., Lu, J., Zhao, H., Velthof, G. L., Oenema, O., Chadwick, D., Williams, D. R., Jin, S., Liu, H., Wang, M., Strokal, M., Kroeze, M., Hu, C. & Ma, L., 30 Gorff 2018, Yn: Environmental Science and Technology.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop
Sanchez Rodriguez, A., Carswell, A. M., Shaw, R., Hunt, J., Saunders, K., Cotton, J., Chadwick, D., Jones, D. L. & Misselbrook, T. H., 17 Gorff 2018, Yn: Frontiers in Sustainable Food Systems.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Life Cycle Assessment of Biofertilizer Production and Use Compared with Conventional Liquid Digestate Management
Styles, D., Adams, P., Thelin, G., Vaneeckhaute, C., Chadwick, D. & Withers, P., 3 Gorff 2018, Yn: Environmental Science and Technology. 52, 13, t. 7468-7476Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Classification of sheep urination events using accelerometers to aid improved measurements of livestock contributions to nitrous oxide emissions
Lush, L., Wilson, R. P., Holton, M. D., Hopkins, P., Marsden, K., Chadwick, D. & King, A. J., 1 Gorff 2018, Yn: Computers and Electronics in Agriculture. 150, t. 170-177Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Determining the influence of environmental and edaphic factors on the fate of the nitrification inhibitors DCD and DMPP in soil
Guardia, G., Marsden, K., Vallejo, A., Jones, D. & Chadwick, D., 15 Mai 2018, Yn: Science of the Total Environment. 624, t. 1202-1212Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Comparative effects of prolonged freshwater and saline flooding on nitrogen cycling in an agricultural soil
Sanchez Rodriguez, A., Chadwick, D., Tatton, G., Hill, P. & Jones, D. L., Ebr 2018, Yn: Applied Soil Ecology. 125, t. 56-70Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Greenhouse gas and ammonia emissions and mitigation options from livestock production in peri-urban agriculture: Beijing – A case study
Wei, S., Bai, Z. H., Chadwick, D., Hou, Y., Qin, W., Zhao, Z. Q., Jiang, R. F. & Ma, L., 20 Maw 2018, Yn: Journal of Cleaner Production. 178, t. 515-525Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Global analysis of agricultural soil denitrification in response to fertilizer nitrogen
Wang, J., Chadwick, D., Cheng, Y. & Yan, X., 1 Maw 2018, Yn: Science of the Total Environment. 616-617, t. 908-917Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Critical review of the impacts of grazing intensity on soil organic carbon storage and other soil quality indicators in extensively managed grasslands
Abdalla, M., Hastings, A., Chadwick, D. R., Jones, D. L., Evans, C. D., Jones, M. B., Rees, R. M. & Smith, P., 1 Chwef 2018, Yn: Agriculture, Ecosystems and Environment. 253, t. 62-81Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl adolygu › adolygiad gan gymheiriaid
- Cyhoeddwyd
Enhanced-efficiency fertilizers are not a panacea for resolving the nitrogen problem
Li, T., Zhang, W., Yin, J., Chadwick, D., Norse, D., Lu, Y., Liu, X., Chen, X., Zhang, F., Powlson, D. & Dou, Z., Chwef 2018, Yn: Global Change Biology. 24, 2, t. e511-e521Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Impact of microbial activity on the leaching of soluble N forms in soil
Carswell, A. M., Hill, P., Jones, D., Blackwell, M. S. A., Johnes, P. J., Chadwick, D. & Dixon, E. R., Ion 2018, Yn: Biology and Fertility of Soils. 54, 1, t. 21-25Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Chapter Four - The Importance of Sustained Grassland and Environmental Research: A Case Study From North Wyke Research Station, UK, 1982–2017
Blackwell, M. S. A., Jarvis, S. C., Wilkins, R. J., Beaumont, D. A., Cardenas, L. M., Chadwick, D., Collins, A. L., Dungait, J. A. J., Gibbs, M. J., Hopkins, A., Lee, M. R. F., Misselbrook, T. H., Murray, P. J. & Tallowin, J. R. B., 2018, Yn: Advances in Agronomy. 149, t. 161-235Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2017
- Cyhoeddwyd
Modelling spatial and inter-annual variations of nitrous oxide emissions from UK cropland and grasslands using DailyDayCent
Fitton, N., Datta, A., Cloy, J. M., Rees, R. M., Topp, C. F. E., Bell, M. J., Cardenas, L. M., Williams, J., Smith, K., Thorman, R., Watson, C. J., McGeough, K. L., Kuhnert, M., Hastings, A., Anthony, S., Chadwick, D. & Smith, P., 1 Rhag 2017, Yn: Agriculture, Ecosystems and Environment. 250, t. 1-11Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation
Wei, Z., Lin, S., Wu, L., Zhao, J., Wang, M., Zhu, B., Mo, Y., Hu, R., Chadwick, D. & Shaaban, M., 1 Rhag 2017, Yn: Atmospheric Environment. 170, t. 269-278Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Crop residues exacerbate the negative effects of extreme flooding on soil quality
Sanchez-Rodriguez, A. R., Hill, P. W., Chadwick, D. R. & Jones, D. L., 1 Hyd 2017, Yn: Biology and Fertility of Soils. 53, 7, t. 751-765Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Nitrogen losses to the environment following food-based digestate and compost applications to agricultural land
Nicholson, F., Bhogal, A., Cardenas, L., Chadwick, D., Misselbrook, T., Rollett, A., Taylor, M., Thorman, R. & Williams, J., 1 Medi 2017, Yn: Environmental Pollution. 228, t. 504-516Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
DMPP is ineffective at mitigating N2O emissions from sheep urine patches in a UK grassland under summer conditions
Marsden, K., Jones, D. & Chadwick, D., 1 Awst 2017, Yn: Agriculture, Ecosystems and Environment. 246, t. 1-11 11 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Critical comparison of the impact of biochar and wood ash on soil organic matter cycling and grassland productivity
Jones, D., Hill, P. & Chadwick, D., Gorff 2017, Yn: Soil Biology and Biochemistry. 110, t. 134-142Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Effects of adding bulking agents on biostabilization and drying of municipal solid waste
Yuan, J., Zhang, D., Li, Y., Chadwick, D., Li, G., Li, Y. & Du, L., 1 Ebr 2017, Yn: Waste Management. 62, t. 52-60Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Mitigating Greenhouse Gas and Ammonia Emissions from Swine Manure Management: A System Analysis
Wang, Y., Dong, H., Zhu, Z., Gerber, P. J., Xin, H., Smith, P., Opio, C., Steinfeld, H. & Chadwick, D., Maw 2017, Yn: Environmental Science and Technology. 51, 8, t. 4503-4511Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Diet management to effectively abate N2O emissions from surface applied pig slurry
Sanchez-Martin, L., Beccaccia, A., De.Blas, C., Garcia-Rebollar, P., Estelles, F., Marsden, K., Chadwick, D. & Vallejo, A., 15 Chwef 2017, Yn: Agriculture, Ecosystems and Environment. 239, t. 1-11Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Current approaches and future trends in compost quality criteria for agronomic, environmental and human health benefits
Bernal, M. P., Sommer, S., Chadwick, D., Qing, C., Li, G. & Michel Jr, F., 2017, Advances in Agronomy. Cyfrol 144. t. 143-233Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod › adolygiad gan gymheiriaid
- Cyhoeddwyd
Livestock housing and manure storage need to be improved in China
Bai, Z., Li, X., Lu, J., Wang, X., Velthof, G. L., Chadwick, D., Luo, J., Ledgard, S., Wu, Z., Jin, S., Oenema, O., Ma, L. & Hu, C., 2017, Yn: Environmental Science and Technology. 51, 15, t. 8212-8214Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2016
- Cyhoeddwyd
Assessment of bioavailable organic phosphorus in tropical forest soils by organic acid extraction and phosphatase hydrolysis
Darch, T., Blackwell, M. S. A., Chadwick, D., Haygarth, P. M., Hawkins, J. M. B. & Turner, B. L., 15 Rhag 2016, Yn: Geoderma. 284, t. 93-102Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Seasonal persistence of faecal indicator organisms in soil following dairy slurry application to land by surface broadcasting and shallow injection
Hodgson, C., Oliver, D. M., Fish, R. D., Bulmer, N. M., Heathwaite, A. L., Winter, M. & Chadwick, D., 1 Rhag 2016, Yn: Journal of Environmental Management. 183, Part 1, t. 325-332Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Reduction of Methane Emission during Slurry Storage by the Addition of Effective Microorganisms and Excessive Carbon Source from Brewing Sugar
Bastami, M. S. B., Jones, D. L. & Chadwick, D. R., 1 Tach 2016, Yn: Journal of Environmental Quality. 45, 6, t. 2016-2022Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Characterising the within-field scale spatial variation of nitrogen in a grassland soil to inform the efficient design of in-situ nitrogen sensor networks for precision agriculture
Shaw, R., Lark, R. M., Williams, A. P., Chadwick, D. R. & Jones, D., 16 Awst 2016, Yn: Agriculture, Ecosystems and Environment. 230, t. 294-306Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Environmental balance of the UK biogas sector: An evaluation by consequential life cycle assessment
Styles, D., Dominguez, E. M. & Chadwick, D., 1 Awst 2016, Yn: Science of the Total Environment. 560-561, t. 241-253Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Quantifying N2O emissions from intensive grassland production: the role of synthetic fertilizer type, application rate, timing and nitrification inhibitors
Bell, M. J., Cloy, J. M., Topp, C. F. E., Ball, B. C., Bagnall, A., Rees, R. M. & Chadwick, D. R., 1 Gorff 2016, Yn: Journal of Agricultural Science. 154, 5, t. 812-827Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Mineralization of organic nitrogen from farm manure applications
Bhogal, A., Williams, J. R., Nicholson, F. A., Chadwick, D. R., Chambers, K. H. & Chambers, B. J., 1 Meh 2016, Yn: Soil Use and Management. 32, S1, t. 32-43Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
A method-centric ‘User Manual’ for the mitigation of diffuse water pollution from agriculture
Cuttler, S. P., Newell-Price, J. P., Harris, D., Chadwick, D., Shepherd, M. A., Anthony, S. G. A., Macleod, C. J. A., Haygarth, P. M. & Chambers, B. J., Meh 2016, Yn: Soil Use and Management. 32, S1, t. 162-171Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils
Carswell, A. M., Hill, P. W., Jones, D., Blackwell, M. S. A., Johnes, P. & Chadwick, D. R., 1 Mai 2016, Yn: Soil Biology and Biochemistry. 96, t. 82-85Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The mobility of nitrification inhibitors under simulated ruminant urine deposition and rainfall: a comparison between DCD and DMPP
Marsden, K. A., Marin-Martinez, A. J., Vallejo, A., Hill, P. W., Jones, D. & Chadwick, D. R., 1 Mai 2016, Yn: Biology and Fertility of Soils. 52, 4, t. 491-503Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The potential for land sparing to offset greenhouse gas emissions from agriculture
Lamb, A., Green, R., Kasoar, T., Phalan, B., zu Ermgassen, E. K. H. J., Balmford, A., Crane, E., Field, R., Bateman, I., Broadmeadow, M., Bruce, T., Goulding, K., Pickett, J., Burney, J., Carey, P., Griffiths, H., Chadwick, D., Hastings, A., Smith, P., Kindred, D. & Wall, E., Mai 2016, Yn: Nature Climate Change. 2016, 6, t. 488-492Allbwn ymchwil: Cyfraniad at gyfnodolyn › Llythyr › adolygiad gan gymheiriaid
- Cyhoeddwyd
Do Effective Micro-Organisms Affect Greenhouse Gas Emissions from Slurry Crusts?
Bastami, M. S. B., Chadwick, D. & Jones, D., 1 Maw 2016, Yn: Journal of Advanced Agricultural Technologies. 3, 1Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Evidence that the efficacy of the nitrification inhibitor dicyandiamide (DCD) is affected by soil properties in UK soils
McGeough, K. L., Watson, C. J., Mueller, C., Laughlin, R. J. & Chadwick, D. R., Maw 2016, Yn: Soil Biology and Biochemistry. 94, t. 222-232Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
How do emission rates and emission factors for nitrous oxide and ammonia vary with manure type and time of application in a Scottish farmland?
Bell, M. J., Hinton, N. J., Cloy, J. M., Topp, C. F. E., Rees, R. M., Williams, J. R., Misselbrook, T. H. & Chadwick, D. R., 15 Chwef 2016, Yn: Geoderma. 264, t. 81-93Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Disentangling the effect of sheep urine patch size and nitrogen loading rate on cumulative N2O emissions
Marsden, K., Jones, D. L. & Chadwick, D., 9 Chwef 2016, Yn: Animal Production Science. 56, 3, t. 265-275Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Runoff- and erosion-driven transport of cattle slurry: linking molecular tracers to hydrological processes
Lloyd, C. E. M., Michaelides, K., Chadwick, D. R., Dungait, J. A. J. & Evershed, R. P., 1 Chwef 2016, Yn: Biogeosciences. 13, 2, t. 551-566Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The urine patch diffusional area: An important N2O source?
Marsden, K. A., Jones, D. & Chadwick, D. R., Ion 2016, Yn: Soil Biology and Biochemistry. 92, January, t. 161-170Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Nitrogen, Phosphorus, and Potassium Flows through the Manure Management Chain in China
Bai, Z., Ma, L., Jin, S., Ma, W., Velthof, G. L., Oenema, O., Liu, L., Chadwick, D. & Zhang, F., 2016, Yn: Environmental Science and Technology. 50, 24, t. 13409-13418Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2015
- Cyhoeddwyd
Plant acquisition and metabolism of the synthetic nitrification inhibitor dicyandiamide and naturally-occurring guanidine from agricultural soils
Marsden, K. A., Scowen, M., Hill, P. W., Jones, D. L. & Chadwick, D. R., Hyd 2015, Yn: Plant and Soil. 395, 1, t. 201-214Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Cattle feed or bioenergy? Consequential life cycle assessment of biogas feedstock options on dairy farms
Styles, D., Gibbons, J., Williams, A. P., Stichnothe, H., Chadwick, D. R. & Healey, J. R., 10 Awst 2015, Yn: Global Change Biology Bioenergy. 7, 5, t. 1034–1049Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation
Bell, M. J., Hinton, N., Cloy, J. M., Topp, C. F., Rees, R. M., Cardenas, L., Scott, T., Webster, C., Ashton, R. W., Whitmore, A. P., Williams, J. R., Balshaw, H., Paine, F., Goulding, K. W. & Chadwick, D. R., 17 Gorff 2015, Yn: Agriculture, Ecosystems and Environment. 212, t. 134-147Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Dissolved Phosphorus Retention in Buffer Strips: Influence of Slope and Soil Type
Darch, T., Carswell, A., Blackwell, M. S., Hawkins, J. M., Haygarth, P. M. & Chadwick, D. R., 10 Gorff 2015, Yn: Journal of Environmental Quality. 44, 4, t. 1216-1224Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Sustainable intensification of China's agriculture: the key role of nutrient management and climate change mitigation and adaptation
Lu, Y. L., Chadwick, D. R., Norse, D., Powlsond, D. & Shi, W. M., 17 Meh 2015, Yn: Agriculture, Ecosystems and Environment. 209, t. 1-4Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Integrating soil testing phosphorus into environmentally based manure management in pen-urban regions: A case study in the Beijing area
Jia, W., Yan, Z. J., Chadwick, D. R., Kang, L. Y., Duan, Z. Q., Bai, Z. H. & Chen, Q., 2 Mai 2015, Yn: Agriculture, Ecosystems and Environment. 209, t. 47-59Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Improving manure nutrient management towards sustainable agricultural intensification in China
Chadwick, D. R., Jia, W., Tong, Y., Yu, G. H., Shen, Q. R. & Chen, Q., 1 Ebr 2015, Yn: Agriculture, Ecosystems and Environment. 209, t. 34-46Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Consequential life cycle assessment of biogas, biofuel and biomass energy options within an arable crop rotation
Styles, D., Gibbons, J., Williams, A. P., Dauber, J., Stichnothe, H., Urban, B., Chadwick, D. R. & Jones, D. L., 26 Chwef 2015, Yn: GCB Bioenergy. 7, 6, t. 1305-1320Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Can macrophyte harvesting from eutrophic water close the loop on nutrient loss from agricultural land?
Quilliam, R. S., van Niekerk, M. A., Chadwick, D. R., Cross, P., Hanley, N., Jones, D. L., Vinten, A. J., Willby, N. & Oliver, D. M., 7 Chwef 2015, Yn: Journal of Environmental Management. 152, t. 210-217Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Global Research Alliance Modelling Platform (GRAMP): An open web platform for modelling greenhouse gas emissions from agro-ecosystems
Yeluripati, J. B., del Prado, A., Sanz-Cobena, A., Rees, R. M., Li, C. S., Chadwick, D. R., Tilston, E., Topp, C. F., Cardenas, L. M., Ingraham, P., Gilhespy, S., Anthony, S., Vetter, S. H., Misselbrook, T., Salas, W. & Smith, P., 15 Ion 2015, Yn: Computers and Electronics in Agriculture. 111, t. 112-120Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2014
- Cyhoeddwyd
Nitrous oxide emissions from cattle excreta applied to a Scottish grassland: Effects of soil and climatic conditions and a nitrification inhibitor
Bell, M. J., Rees, R. M., Cloy, J. M., Topp, C. F., Bagnall, A. & Chadwick, D. R., 10 Rhag 2014, Yn: Science of the Total Environment. 508, t. 343-353Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
First 20 years of DNDC (DeNitrification DeComposition): Model evolution
Gilhepsy, S. L., Anthony, S., Cardenas, L., Chadwick, D. R., del Prado, A., Changsheng Li, N. V., Misselbrook, T., Rees, R. M., Salas, W., Sanz-Cobena, A., Smith, P., Tilston, E. L., Topp, C. F., Vetter, S. & Yeluripati, J. B., 24 Tach 2014, Yn: Ecological Modelling. 292, t. 51-62Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
The challenge of modelling nitrogen management at the field scale: simulation and sensitivity analysis of N2O fluxes across nine experimental sites using DailyDayCente
Fitton, N., Datta, A., Hastings, A., Kuhnert, M., Topp, C. F., Cloy, J. M., Rees, R. M., Cardenas, L. M., Williams, J. R., Smith, K., Chadwick, D. R. & Smith, P., 8 Medi 2014, Yn: Environmental Research Letters. 9, 9Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid