Prof Dave Chadwick

• Effect of climate change on decomposition in forest ecosystems. Lancaster Univ. PhD
• BSc Agriculture and Environmental Science. University of Newcastle upon Tyne. 2:i. BSc

My interests are in the management of nutrients in livestock manures, other organic resources and fertilisers to optimise nutrient utilisation whilst minimising impacts on water and air quality. This includes; quantifying and mitigating greenhouse gas emissions, reducing the risk of transfers of pollutants to watercourses, and understanding the secondary impacts of mitigating diffuse agricultural pollution. As well as publishing refereed scientific papers, I also contribute to policy and practice.

2018

• Sheep urine patch N2O emissions are lower from extensively-managed than intensively-managed grasslands
  
  Marsden, K, Holmberg, J, Jones, DL & Chadwick, D 2018, 'Sheep urine patch N2O emissions are lower from extensively-managed than intensively-managed grasslands' Agriculture, Ecosystems and Environment, vol. 265, pp. 264-274. DOI: 10.1016/j.agee.2018.06.025
• 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, JM, Chadwick, D & Vallejo, A 2018, 'Urea-based fertilization strategies to reduce yield-scaled N oxides and enhance bread-making quality in a rainfed Mediterranean wheat crop' Agriculture, Ecosystems and Environment, vol. 265, pp. 421-431. DOI: 10.1016/j.agee.2018.06.033
• 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, Chara, D, Finch, T, Garnett, E, Gathorne-Hardy, A, Hernandez-Medrano, J, Herrero, M, Hua, F, Latawiec, A, Misselbrook, T, Phalan, B, Simmons, B, Takahashi, T, Vause, J, zu Ermgassen, E & Eisner, R 2018, 'The environmental costs and benefits of high-yield farming' Nature Sustainability , pp. 477-485. DOI: 10.1038/s41893-018-0138-5
• 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 2018, 'Composting with negative pressure aeration for the mitigation of ammonia emissions and global warming potential' Journal of Cleaner Production, vol. 195, pp. 448-457. DOI: 10.1016/j.jclepro.2018.05.146
• Repeated application of anaerobic digestate, undigested cattle slurry and inorganic fertilizer N: Impacts on pasture yield and quality
  
  Walsh, JJ, Jones, DL, Chadwick, D & Williams, A 2018, 'Repeated application of anaerobic digestate, undigested cattle slurry and inorganic fertilizer N: Impacts on pasture yield and quality' Grass and Forage Science, vol. 73, pp. 758-763. DOI: 10.1111/gfs.12354
• What agricultural practices are most likely to deliver ‘sustainable intensification’?
  
  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 2018, 'What agricultural practices are most likely to deliver ‘sustainable intensification’?' Food and Energy Security.
• 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, DL 2018, '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' Soil Biology and Biochemistry, vol. 125, pp. 319-327. DOI: 10.1016/j.soilbio.2018.08.009
• Designing Vulnerable Zones of Nitrogen and Phosphorus Transfers to Control Water Pollution in China
  
  Bai, Z, Lu, J, Zhao, H, Velthof, GL, Oenema, O, Chadwick, D, Williams, DR, Jin, S, Liu, H, Wang, M, Strokal, M, Kroeze, M, Hu, C & Ma, L 2018, 'Designing Vulnerable Zones of Nitrogen and Phosphorus Transfers to Control Water Pollution in China' Environmental Science and Technology.
• Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop
  
  Sanchez Rodriguez, A, Carswell, AM, Shaw, R, Hunt, J, Saunders, K, Cotton, J, Chadwick, D, Jones, DL & Misselbrook, TH 2018, 'Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop' Frontiers in Sustainable Food Systems. DOI: 10.3389/fsufs.2018.00035
• 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 2018, 'Life Cycle Assessment of Biofertilizer Production and Use Compared with Conventional Liquid Digestate Management' Environmental Science and Technology, vol. 52, no. 13, pp. 7468-7476. DOI: 10.1021/acs.est.8b01619
• Classification of sheep urination events using accelerometers to aid improved measurements of livestock contributions to nitrous oxide emissions
  
  Lush, L, Wilson, RP, Holton, MD, Hopkins, P, Marsden, K, Chadwick, D & King, AJ 2018, 'Classification of sheep urination events using accelerometers to aid improved measurements of livestock contributions to nitrous oxide emissions' Computers and Electronics in Agriculture, vol. 150, pp. 170-177. DOI: 10.1016/j.compag.2018.04.018
• 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 2018, 'Determining the influence of environmental and edaphic factors on the fate of the nitrification inhibitors DCD and DMPP in soil' Science of the Total Environment, vol. 624, pp. 1202-1212. DOI: 10.1016/j.scitotenv.2017.12.250
• The contribution of cattle urine and dung to nitrous oxide emissions
  
  Chadwick, D, Cardenas, LM, Dhanoa, MS, Donovan, N, Misselbrook, T, Williams, JR, Thorman, RE, McGeough, KL, Watson, CJ, Watson, CJ, Bell, M, Anthony, SG & Rees, RM 2018, 'The contribution of cattle urine and dung to nitrous oxide emissions: Quantification of country specific emission factors and implications for national inventories' Science of the Total Environment, vol. 635, pp. 607-617. DOI: 10.1016/j.scitotenv.2018.04.152
• 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, DL 2018, 'Comparative effects of prolonged freshwater and saline flooding on nitrogen cycling in an agricultural soil' Applied Soil Ecology, vol. 125, pp. 56-70. DOI: 10.1016/j.apsoil.2017.11.022
• Greenhouse gas and ammonia emissions and mitigation options from livestock production in peri-urban agriculture: Beijing – A case study
  
  Wei, S, Bai, ZH, Chadwick, D, Hou, Y, Qin, W, Zhao, ZQ, Jiang, RF & Ma, L 2018, 'Greenhouse gas and ammonia emissions and mitigation options from livestock production in peri-urban agriculture: Beijing – A case study' Journal of Cleaner Production, vol. 178, pp. 515-525. DOI: 10.1016/j.jclepro.2017.12.257
• Chapter Four - The Importance of Sustained Grassland and Environmental Research: A Case Study From North Wyke Research Station, UK, 1982–2017
  
  Blackwell, MSA, Jarvis, SC, Wilkins, RJ, Beaumont, DA, Cardenas, LM, Chadwick, D, Collins, AL, Dungait, JAJ, Gibbs, MJ, Hopkins, A, Lee, MRF, Misselbrook, TH, Murray, PJ & Tallowin, JRB 2018, 'Chapter Four - The Importance of Sustained Grassland and Environmental Research: A Case Study From North Wyke Research Station, UK, 1982–2017' Advances in Agronomy, vol. 149, pp. 161-235. DOI: 10.1016/bs.agron.2018.01.004
• Global analysis of agricultural soil denitrification in response to fertilizer nitrogen
  
  Wang, J, Chadwick, D, Cheng, Y & Yan, X 2018, 'Global analysis of agricultural soil denitrification in response to fertilizer nitrogen' Science of the Total Environment, vol. 616-617, pp. 908-917. DOI: 10.1016/j.scitotenv.2017.10.229
• 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, DR, Jones, DL, Evans, CD, Jones, MB, Rees, RM & Smith, P 2018, 'Critical review of the impacts of grazing intensity on soil organic carbon storage and other soil quality indicators in extensively managed grasslands' Agriculture, Ecosystems and Environment, vol. 253, pp. 62-81. DOI: 10.1016/j.agee.2017.10.023
• 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 2018, 'Enhanced-efficiency fertilizers are not a panacea for resolving the nitrogen problem' Global Change Biology, vol. 24, no. 2, pp. e511-e521. DOI: 10.1111/gcb.13918
• Impact of microbial activity on the leaching of soluble N forms in soil
  
  Carswell, AM, Hill, P, Jones, D, Blackwell, MSA, Johnes, PJ, Chadwick, D & Dixon, ER 2018, 'Impact of microbial activity on the leaching of soluble N forms in soil' Biology and Fertility of Soils, vol. 54, no. 1, pp. 21-25.

2017

• Modelling spatial and inter-annual variations of nitrous oxide emissions from UK cropland and grasslands using DailyDayCent
  
  Fitton, N, Datta, A, Cloy, JM, Rees, RM, Topp, CFE, Bell, MJ, Cardenas, LM, Williams, J, Smith, K, Thorman, R, Watson, CJ, McGeough, KL, Kuhnert, M, Hastings, A, Anthony, S, Chadwick, D & Smith, P 2017, 'Modelling spatial and inter-annual variations of nitrous oxide emissions from UK cropland and grasslands using DailyDayCent' Agriculture, Ecosystems and Environment, vol. 250, pp. 1-11. DOI: 10.1016/j.agee.2017.08.032
• 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 2017, 'Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation' Atmospheric Environment, vol. 170, pp. 269-278. DOI: 10.1016/j.atmosenv.2017.09.021
• 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 2017, 'Nitrogen losses to the environment following food-based digestate and compost applications to agricultural land' Environmental Pollution, vol. 228, pp. 504-516.
• DMPP is ineffective at mitigating N2O emissions from sheep urine patches in a UK grassland under summer conditions
  
  Marsden, K, Jones, D & Chadwick, D 2017, 'DMPP is ineffective at mitigating N2O emissions from sheep urine patches in a UK grassland under summer conditions' Agriculture, Ecosystems and Environment, vol. 246, pp. 1-11. DOI: 10.1016/j.agee.2017.05.017
• Critical comparison of the impact of biochar and wood ash on soil organic matter cycling and grassland productivity
  
  Jones, D, Hill, P & Chadwick, D 2017, 'Critical comparison of the impact of biochar and wood ash on soil organic matter cycling and grassland productivity' Soil Biology and Biochemistry, vol. 110, pp. 134-142. DOI: 10.1016/j.soilbio.2017.03.012
• Crop residues exacerbate the negative effects of extreme flooding on soil quality
  
  Hill, P, Jones, D & Chadwick, D 2017, 'Crop residues exacerbate the negative effects of extreme flooding on soil quality' Biology and Fertility of Soils.
• 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 2017, 'Effects of adding bulking agents on biostabilization and drying of municipal solid waste' Waste Management, vol. 62, pp. 52-60. DOI: 10.1016/j.wasman.2017.02.027
• Mitigating Greenhouse Gas and Ammonia Emissions from Swine Manure Management
  
  Wang, Y, Dong, H, Zhu, Z, Gerber, PJ, Xin, H, Smith, P, Opio, C, Steinfeld, H & Chadwick, D 2017, 'Mitigating Greenhouse Gas and Ammonia Emissions from Swine Manure Management: A System Analysis' Environmental Science and Technology, vol. 51, no. 8, pp. 4503-4511. DOI: 10.1021/acs.est.6b06430
• 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 2017, 'Diet management to effectively abate N2O emissions from surface applied pig slurry' Agriculture, Ecosystems and Environment, vol. 239, pp. 1-11. DOI: 10.1016/j.agee.2016.12.007
• Current approaches and future trends in compost quality criteria for agronomic, environmental and human health benefits
  
  Bernal, MP, Sommer, S, Chadwick, D, Qing, C, Li, G & Michel Jr, F 2017, Current approaches and future trends in compost quality criteria for agronomic, environmental and human health benefits. in Advances in Agronomy. vol. 144, pp. 143-233. DOI: 10.1016/bs.agron.2017.03.002
• Livestock housing and manure storage need to be improved in China
  
  Bai, Z, Li, X, Lu, J, Wang, X, Velthof, GL, Chadwick, D, Luo, J, Ledgard, S, Wu, Z, Jin, S, Oenema, O, Ma, L & Hu, C 2017, 'Livestock housing and manure storage need to be improved in China' Environmental Science and Technology, vol. 51, no. 15, pp. 8212-8214. DOI: 10.1021/acs.est.7b02672

2016

• Assessment of bioavailable organic phosphorus in tropical forest soils by organic acid extraction and phosphatase hydrolysis
  
  Darch, T, Blackwell, MSA, Chadwick, D, Haygarth, PM, Hawkins, JMB & Turner, BL 2016, 'Assessment of bioavailable organic phosphorus in tropical forest soils by organic acid extraction and phosphatase hydrolysis' Geoderma, vol. 284, pp. 93-102. DOI: 10.1016/j.geoderma.2016.08.018
• Seasonal persistence of faecal indicator organisms in soil following dairy slurry application to land by surface broadcasting and shallow injection
  
  Hodgson, C, Oliver, DM, Fish, RD, Bulmer, NM, Heathwaite, AL, Winter, M & Chadwick, D 2016, 'Seasonal persistence of faecal indicator organisms in soil following dairy slurry application to land by surface broadcasting and shallow injection' Journal of Environmental Management, vol. 183, no. Part 1, pp. 325-332. DOI: 10.1016/j.jenvman.2016.08.047
• 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, RM, Williams, AP, Chadwick, DR & Jones, D 2016, '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' Agriculture, Ecosystems and Environment, vol. 230, pp. 294-306. DOI: 10.1016/j.agee.2016.06.004
• Environmental balance of the UK biogas sector: An evaluation by consequential life cycle assessment
  
  Styles, D, Dominguez, EM & Chadwick, D 2016, 'Environmental balance of the UK biogas sector: An evaluation by consequential life cycle assessment' Science of the Total Environment, vol. 560-561, pp. 241-253. DOI: 10.1016/j.scitotenv.2016.03.236
• Quantifying N2O emissions from intensive grassland production: the role of synthetic fertilizer type, application rate, timing and nitrification inhibitors
  
  Bell, MJ, Cloy, JM, Topp, CFE, Ball, BC, Bagnall, A, Rees, RM & Chadwick, DR 2016, 'Quantifying N2O emissions from intensive grassland production: the role of synthetic fertilizer type, application rate, timing and nitrification inhibitors' Journal of Agricultural Science, vol. 154, no. 5, pp. 812-827. DOI: 10.1017/S0021859615000945
• Mineralization of organic nitrogen from farm manure applications
  
  Bhogal, A, Williams, JR, Nicholson, FA, Chadwick, DR, Chambers, KH & Chambers, BJ 2016, 'Mineralization of organic nitrogen from farm manure applications' Soil Use and Management, vol. 32, no. S1, pp. 32-43. DOI: 10.1111/sum.12263
• A method-centric ‘User Manual’ for the mitigation of diffuse water pollution from agriculture
  
  Cuttler, SP, Newell-Price, JP, Harris, D, Chadwick, D, Shepherd, MA, Anthony, SGA, Macleod, CJA, Haygarth, PM & Chambers, BJ 2016, 'A method-centric ‘User Manual’ for the mitigation of diffuse water pollution from agriculture' Soil Use and Management, vol. 32, no. S1, pp. 162-171. DOI: 10.1111/sum.12242
• Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils
  
  Carswell, AM, Hill, PW, Jones, D, Blackwell, MSA, Johnes, P & Chadwick, DR 2016, 'Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils' Soil Biology and Biochemistry, vol. 96, pp. 82-85. DOI: 10.1016/j.soilbio.2016.01.017
• The mobility of nitrification inhibitors under simulated ruminant urine deposition and rainfall: a comparison between DCD and DMPP
  
  Marsden, KA, Marin-Martinez, AJ, Vallejo, A, Hill, PW, Jones, D & Chadwick, DR 2016, 'The mobility of nitrification inhibitors under simulated ruminant urine deposition and rainfall: a comparison between DCD and DMPP' Biology and Fertility of Soils, vol. 52, no. 4, pp. 491-503. DOI: 10.1007/s00374-016-1092-x
• The potential for land sparing to offset greenhouse gas emissions from agriculture
  
  Lamb, A, Green, R, Kasoar, T, Phalan, B, zu Ermgassen, EKHJ, 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 2016, 'The potential for land sparing to offset greenhouse gas emissions from agriculture' Nature Climate Change, vol. 2016, no. 6, pp. 488-492. DOI: 10.1038/nclimate2910
• Do Effective Micro-Organisms Affect Greenhouse Gas Emissions from Slurry Crusts?
  
  Bastami, MSB, Chadwick, D & Jones, D 2016, 'Do Effective Micro-Organisms Affect Greenhouse Gas Emissions from Slurry Crusts?' Journal of Advanced Agricultural Technologies, vol. 3, no. 1.
• Evidence that the efficacy of the nitrification inhibitor dicyandiamide (DCD) is affected by soil properties in UK soils
  
  McGeough, KL, Watson, CJ, Mueller, C, Laughlin, RJ & Chadwick, DR 2016, 'Evidence that the efficacy of the nitrification inhibitor dicyandiamide (DCD) is affected by soil properties in UK soils' Soil Biology and Biochemistry, vol. 94, pp. 222-232. DOI: 10.1016/j.soilbio.2015.11.017
• 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, MJ, Hinton, NJ, Cloy, JM, Topp, CFE, Rees, RM, Williams, JR, Misselbrook, TH & Chadwick, DR 2016, 'How do emission rates and emission factors for nitrous oxide and ammonia vary with manure type and time of application in a Scottish farmland?' Geoderma, vol. 264, pp. 81-93. DOI: 10.1016/j.geoderma.2015.10.007
• Disentangling the effect of sheep urine patch size and nitrogen loading rate on cumulative N2O emissions
  
  Marsden, K, Jones, DL & Chadwick, D 2016, 'Disentangling the effect of sheep urine patch size and nitrogen loading rate on cumulative N2O emissions' Animal Production Science, vol. 56, no. 3, pp. 265-275. DOI: 10.1071/AN15613
• Runoff- and erosion-driven transport of cattle slurry: linking molecular tracers to hydrological processes
  
  Lloyd, CEM, Michaelides, K, Chadwick, DR, Dungait, JAJ & Evershed, RP 2016, 'Runoff- and erosion-driven transport of cattle slurry: linking molecular tracers to hydrological processes' Biogeosciences, vol. 13, no. 2, pp. 551-566. DOI: 10.5194/bg-13-551-2016
• The urine patch diffusional area: An important N2O source?
  
  Marsden, KA, Jones, D & Chadwick, DR 2016, 'The urine patch diffusional area: An important N2O source?' Soil Biology and Biochemistry, vol. 92, no. January, pp. 161-170. DOI: 10.1016/j.soilbio.2015.10.011, 10.1016/j.soilbio.2015.10.011
• Nitrogen, Phosphorus, and Potassium Flows through the Manure Management Chain in China
  
  Bai, Z, Ma, L, Jin, S, Ma, W, Velthof, GL, Oenema, O, Liu, L, Chadwick, D & Zhang, F 2016, 'Nitrogen, Phosphorus, and Potassium Flows through the Manure Management Chain in China' Environmental Science and Technology, vol. 50, no. 24, pp. 13409-13418. DOI: 10.1021/acs.est.6b03348

2015

• Plant acquisition and metabolism of the synthetic nitrification inhibitor dicyandiamide and naturally-occurring guanidine from agricultural soils
  
  Marsden, KA, Scowen, M, Hill, PW, Jones, DL & Chadwick, DR 2015, 'Plant acquisition and metabolism of the synthetic nitrification inhibitor dicyandiamide and naturally-occurring guanidine from agricultural soils' Plant and Soil, vol. 395, no. 1, pp. 201-214. DOI: 10.1007/s11104-015-2549-7
• Cattle feed or bioenergy? Consequential life cycle assessment of biogas feedstock options on dairy farms
  
  Styles, D, Gibbons, J, Williams, AP, Stichnothe, H, Chadwick, DR & Healey, JR 2015, 'Cattle feed or bioenergy? Consequential life cycle assessment of biogas feedstock options on dairy farms' Global Change Biology Bioenergy, vol. 7, no. 5, pp. 1034–1049. DOI: 10.1111/gcbb.12189
• Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation
  
  Bell, MJ, Hinton, N, Cloy, JM, Topp, CF, Rees, RM, Cardenas, L, Scott, T, Webster, C, Ashton, RW, Whitmore, AP, Williams, JR, Balshaw, H, Paine, F, Goulding, KW & Chadwick, DR 2015, 'Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation' Agriculture, Ecosystems and Environment, vol. 212, pp. 134-147. DOI: 10.1016/j.agee.2015.07.003
• Dissolved Phosphorus Retention in Buffer Strips: Influence of Slope and Soil Type
  
  Darch, T, Carswell, A, Blackwell, MS, Hawkins, JM, Haygarth, PM & Chadwick, DR 2015, 'Dissolved Phosphorus Retention in Buffer Strips: Influence of Slope and Soil Type' Journal of Environmental Quality, vol. 44, no. 4, pp. 1216-1224. DOI: 10.2134/jeq2014.10.0440
• Sustainable intensification of China's agriculture: the key role of nutrient management and climate change mitigation and adaptation
  
  Lu, YL, Chadwick, DR, Norse, D, Powlsond, D & Shi, WM 2015, 'Sustainable intensification of China's agriculture: the key role of nutrient management and climate change mitigation and adaptation' Agriculture, Ecosystems and Environment, vol. 209, pp. 1-4. DOI: 10.1016/j.agee.2015.05.012
• Integrating soil testing phosphorus into environmentally based manure management in pen-urban regions: A case study in the Beijing area
  
  Jia, W, Yan, ZJ, Chadwick, DR, Kang, LY, Duan, ZQ, Bai, ZH & Chen, Q 2015, 'Integrating soil testing phosphorus into environmentally based manure management in pen-urban regions: A case study in the Beijing area' Agriculture, Ecosystems and Environment, vol. 209, pp. 47-59. DOI: 10.1016/j.agee.2015.04.028
• Improving manure nutrient management towards sustainable agricultural intensification in China
  
  Chadwick, DR, Jia, W, Tong, Y, Yu, GH, Shen, QR & Chen, Q 2015, 'Improving manure nutrient management towards sustainable agricultural intensification in China' Agriculture, Ecosystems and Environment, vol. 209, pp. 34-46. DOI: 10.1016/j.agee.2015.03.025
• Consequential life cycle assessment of biogas, biofuel and biomass energy options within an arable crop rotation
  
  Styles, D, Gibbons, J, Williams, AP, Dauber, J, Stichnothe, H, Urban, B, Chadwick, DR & Jones, DL 2015, 'Consequential life cycle assessment of biogas, biofuel and biomass energy options within an arable crop rotation' GCB Bioenergy, vol. 7, no. 6, pp. 1305-1320. DOI: 10.1111/gcbb.12246
• Can macrophyte harvesting from eutrophic water close the loop on nutrient loss from agricultural land?
  
  Quilliam, RS, van Niekerk, MA, Chadwick, DR, Cross, P, Hanley, N, Jones, DL, Vinten, AJ, Willby, N & Oliver, DM 2015, 'Can macrophyte harvesting from eutrophic water close the loop on nutrient loss from agricultural land?' Journal of Environmental Management, vol. 152, pp. 210-217. DOI: 10.1016/j.jenvman.2015.01.046
• Global Research Alliance Modelling Platform (GRAMP): An open web platform for modelling greenhouse gas emissions from agro-ecosystems
  
  Yeluripati, JB, del Prado, A, Sanz-Cobena, A, Rees, RM, Li, CS, Chadwick, DR, Tilston, E, Topp, CF, Cardenas, LM, Ingraham, P, Gilhespy, S, Anthony, S, Vetter, SH, Misselbrook, T, Salas, W & Smith, P 2015, 'Global Research Alliance Modelling Platform (GRAMP): An open web platform for modelling greenhouse gas emissions from agro-ecosystems' Computers and Electronics in Agriculture, vol. 111, pp. 112-120. DOI: 10.1016/j.compag.2014.11.016

2014

• Nitrous oxide emissions from cattle excreta applied to a Scottish grassland: Effects of soil and climatic conditions and a nitrification inhibitor
  
  Bell, MJ, Rees, RM, Cloy, JM, Topp, CF, Bagnall, A & Chadwick, DR 2014, 'Nitrous oxide emissions from cattle excreta applied to a Scottish grassland: Effects of soil and climatic conditions and a nitrification inhibitor' Science of the Total Environment, vol. 508, pp. 343-353. DOI: 10.1016/j.scitotenv.2014.12.008
• First 20 years of DNDC (DeNitrification DeComposition): Model evolution
  
  Gilhepsy, SL, Anthony, S, Cardenas, L, Chadwick, DR, del Prado, A, Changsheng Li, NV, Misselbrook, T, Rees, RM, Salas, W, Sanz-Cobena, A, Smith, P, Tilston, EL, Topp, CF, Vetter, S & Yeluripati, JB 2014, 'First 20 years of DNDC (DeNitrification DeComposition): Model evolution' Ecological Modelling, vol. 292, pp. 51-62. DOI: 10.1016/j.ecolmodel.2014.09.004
• 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, CF, Cloy, JM, Rees, RM, Cardenas, LM, Williams, JR, Smith, K, Chadwick, DR & Smith, P 2014, 'The challenge of modelling nitrogen management at the field scale: simulation and sensitivity analysis of N2O fluxes across nine experimental sites using DailyDayCente' Environmental Research Letters, vol. 9, no. 9. DOI: 10.1088/1748-9326/9/9/095003
• A Meta-Analysis of Organic and Inorganic Phosphorus in Organic Fertilizers, Soils, and Water: Implications for Water Quality
  
  Darch, T, Blackwell, MS, Hawkins, JM, Haygarth, PM & Chadwick, DR 2014, 'A Meta-Analysis of Organic and Inorganic Phosphorus in Organic Fertilizers, Soils, and Water: Implications for Water Quality' Critical Reviews in Environmental Science and Technology, vol. 44, no. 19, pp. 2172-2202. DOI: 10.1080/10643389.2013.790752
• The impact of using alternative forages on the nutrient value within slurry and its implications for forage productivity in agricultural systems
  
  Crotty, FV, Fychan, R, Theobald, VJ, Sanderson, R, Chadwick, DR & Marley, CL 2014, 'The impact of using alternative forages on the nutrient value within slurry and its implications for forage productivity in agricultural systems' PLoS ONE, vol. 9, no. 5. DOI: 10.1371/journal.pone.0097516
• Effect of cattle urine addition on the surface emissions and subsurface concentrations of greenhouse gases in a UK peat grassland
  
  Boon, A, Robinson, JS, Chadwick, DR & Cardenas, LM 2014, 'Effect of cattle urine addition on the surface emissions and subsurface concentrations of greenhouse gases in a UK peat grassland' Agriculture, Ecosystems and Environment, vol. 186, pp. 23-32. DOI: 10.1016/j.agee.2014.01.008
• Optimizing chamber methods for measuring nitrous oxide emissions from plot-based agricultural experiments
  
  Chadwick, DR, Cardenas, L, Misselbrook, TH, Smith, KA, Rees, RM, Watson, CJ, McGeough, KL, Williams, JR, Cloy, JM, Thorman, RE & Dhanoa, MS 2014, 'Optimizing chamber methods for measuring nitrous oxide emissions from plot-based agricultural experiments' European Journal of Soil Science, vol. 65, no. 2, pp. 295-307. DOI: 10.1111/ejss.12117

2013

• New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China
  
  Zhang, WF, Dou, ZX, He, P, Ju, XT, Powlson, D, Chadwick, DR, Norse, D, Lu, YL, Zhang, Y, Wu, L, Chen, XP, Cassman, KG & Zhang, FS 2013, 'New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China' PNAS, vol. 110, no. 21, pp. 8375-8380. DOI: 10.1073/pnas.1210447110

2011

• The relationship between lay and technical views of Escherichia coli O157 risk.
  
  Strachan, NJ, Hunter, CJ, Jones, CD, Wilson, RS, Ethelberg, S, Cross, P, Williams, AP, MacRitchie, L, Rotariu, O & Chadwick, D 2011, 'The relationship between lay and technical views of Escherichia coli O157 risk.' Philosophical Transactions of the Royal Society B, vol. 366, no. 1573, pp. 1999-2009. DOI: 10.1098/rstb.2010.0393

2010

• Tracing the rate and extent of N and C flow from 13C,15N-glycine and glutamate into individual de novo synthesised soil amino acids
  
  Knowles, TD, Chadwick, DR, Bol, R & Evershed, RP 2010, 'Tracing the rate and extent of N and C flow from 13C,15N-glycine and glutamate into individual de novo synthesised soil amino acids' Organic Geochemistry, vol. 41, no. 12, pp. 1259-1268. DOI: 10.1016/j.orggeochem.2010.09.003
• Nitrous oxide emissions from small-scale farmland features of UK livestock farming systems
  
  Matthews, RA, Chadwick, DR, Retter, AL, Blackwell, MS & Yamulki, S 2010, 'Nitrous oxide emissions from small-scale farmland features of UK livestock farming systems' Agriculture, Ecosystems and Environment, vol. 136, no. 3-4, pp. 192-198. DOI: 10.1016/j.agee.2009.11.011
• Quantifying annual N2O emission fluxes from grazed grassland under a range of inorganic fertiliser nitrogen inputs
  
  Cardenas, LM, Thorman, R, Ashlee, N, Butler, M, Chadwick, DR, Chambers, B, Cuttle, S, Donovan, N, Kingston, H, Lane, S, Dhanoa, MS & Schofield, D 2010, 'Quantifying annual N2O emission fluxes from grazed grassland under a range of inorganic fertiliser nitrogen inputs' Agriculture, Ecosystems and Environment, vol. 136, no. 3-4, pp. 218-226. DOI: 10.1016/j.agee.2009.12.006

2008

• Reducing Escherichia coli O157 risk in rural communities
  
  Gordon, H, Roberts, J, Wossink, A, Jones, C, Hunter, C, Chadwick, D, Ogden, I, Jones, D, Rotariu, O, Strachan, N, Erdem, S, Rigby, D, Farrington, J, Teunis, P, Kosmider, R, Williams, P, Cross, P & Killham, K 2008, 'Reducing Escherichia coli O157 risk in rural communities' SAC-SEPA Proceedings: Agriculture in a Changing Environment.

2004

• Dissolved organic nitrogen concentration in two grassland soils.
  
  Jones, DL, Farrar, JF, Willett, VB, Hatch, DJ (ed.), Chadwick, DR, Jarvis, SC & Roker, JA (ed.) 2004, Dissolved organic nitrogen concentration in two grassland soils. in Controlling Nitrogen Flows and Losses. 2004 edn, Wageningen Academic Publishers, pp. 441-443.
• Dissolved organic nitrogen concentration in two grassland soils.
  
  Jones, DL, Farrar, JF, Willett, VB, Hatch, DJ (ed.), Chadwick, DR, Jarvis, SC & Roker, JA (ed.) 2004, Dissolved organic nitrogen concentration in two grassland soils. in Controlling nitrogen flows and losses. 2004 edn, Wageningen Academic Publishers, pp. 441-443.
• Matching supply with demand.
  
  Murphy, DV, Stockdale, EA, Hoyle, FC, Smith, JU, Fillery, IR, Milton, N, Cookson, WR, Brussaard, L, Jones, DL, Hatch, DJ (ed.), Chadwick, DR, Jarvis, SC & Roker, JA (ed.) 2004, Matching supply with demand. in Controlling nitrogen flows and losses. 2004 edn, Wageningen Academic Publishers, pp. 101-112.
• Missing N: is the solution in dissolved N?
  
  Macdonald, AJ, Jones, DL, Hatch, DJ (ed.), Chadwick, DR, Jarvis, SC (ed.) & Roker, JA (ed.) 2004, Missing N: is the solution in dissolved N? in Controlling nitrogen flows and losses. 2004 edn, Wageningen Academic Publishers, pp. 600-605.

• Climate smart agriculture in Wales - subcontract to Welsh Lamb and Beef Producers
• Climate smart agriculture in Wales - RDP GHG adaptation and mitigation
• Dis-aggregated ovine emission factors associated with dung and urine deposition in upland and lowland production systems
• Discovery of new nitrification inhibitors - Phase II
• Investigating the feasibility of slurry acidification in the United Kingdom through field trials
• KESS II PhD project with Welsh Government BUK214
• Sustainable futures for Costa Rica dairy sector: optimising environmental and economic outcomes
• Target-N2O:Targeting N2O emission hot-spots in dairy pastures for mitigation action: microbes, stable isotope methods and modelling
• BBSRC-China joint funding of research
• Collation of N2O emission data from DEFRA-funded projects

Current projects include:

I am PI of:

• BBSRC Global Challenge Research Fund project: Sustainable futures for the Costa Rica dairy sector: optimising environmental and economic outcomes – SusCoRiDa http://suscorida.bangor.ac.uk/index.php.en
• NERC project: Grazing behaviour, urine composition and soil properties are key drivers of nitrous oxide emissions from livestock urine in the uplands (Uplands-N₂O). (With Rothamsted Research - North Wyke, and Leicester, Swansea and Texas A&M Universities). http://uplands-n2o.bangor.ac.uk/

I am Co-I of:

• Defra Funded project: Investigating the Feasibility of Slurry Acidification in the United Kingdom through Field Trials
• BBSRC SARIC project: Breaking the Barriers to Soil Testing on Pastures (Breaking-STEP)
• NERC Soil Security project: Securing long-term ecosystem function in lowland organic soils (SEFLOS)
• BBSRC SARIC project: Real-time in situ sensing of soil nitrogen status to promote enhanced nitrogen use efficiency in agricultural systems
• BBSRC (Newton Funded) UK-China Virtual Joint Centre on Agricultural Nitrogen (CINAg)
• RDP Welsh Government project: Climate Smart Agriculture in Wales (CSA Wales)

Recent completed projects include:

• PI - of Defra / Devolved Administrations funded >£6.5M project: Improving the Agricultural Greenhouse Gas Emissions Inventory – Nitrous Oxide (InveN₂Ory). www.ghgplatform.org.uk
• Work Package Leader, Diffuse Water Pollution and Climate Change Mitigation, of the Welsh Government funded project: Glastir Monitoring and Evaluation Programme. (Led by CEH Bangor). https://gmep.wales/
• Bangor University lead of Defra Sustainable Intensification Platform Project 1 – Farm-scale interventions at Henfaes Research Centre (Led by NIAB). http://www.siplatform.org.uk/
•  Bangor University lead of Defra Sustainable Intensification Platform Project 2 – Collaborative interventions in the Conwy Catchment (led by Exeter University). http://www.siplatform.org.uk/

Current PhD students include:

• Ma Yan (Funded by Bangor-China Scholarship Council Scheme, Bangor University, with Prof Davey Jones, Dr Laura Cardenas and Dr Tony Hooper). The use of biological nitrification inhibitors to affect N cycling and losses from agricultural soils.

• Danielle Hunt (Funded by NERC STARS Industrial Programme, with Prof Davey Jones, Dr. Laura Cardenas and Prof Roland Bol). On the pee! A mechanistic understanding of nitrogen and carbon cycling in the urine patch. Welsh Government as CASE partner.

• John Langley (Funded by Defra project; Effects of slurry and digestate acidification on soil quality and function, with Prof. Davey Jones, Bangor Univ, and Prof Tom Misselbrook, (Rothamsted Research)

Recent PhD students include:

• Karina Marsden (Bangor University funded, Bangor University, with Prof. Davey Jones, 2016 completion).  Spatial distribution of nitrogen transformations (and losses) in the urine patch environment.

• Saufi Bastami (Funded by Malaysian Government, Bangor University, with Prof. Davey Jones, 2016 completion). Reducing methane emissions from slurry stores by modifying the microbial environment.

• Guillermo Guardia Vazquez (Universidad Politecnica de Madrid, with Prof Antonio Vallejo. 2017 completion). Strategies to Mitigate Greenhouse Gas and Nitric Oxide Emissions in Rainfed and Irrigated Agro-Ecosystems.

• Yuhong Li (Funded by Bangor-China Scholarship Council Scheme, Bangor University, with Prof Davey Jones. 2017 completion). The fate of nitrogen and phosphorus in separated slurry and digestate.

Dave Chadwick is Professor of Sustainable Land Use Systems in the School of Natural Sciences. His interests are in optimising nutrient management and reducing diffuse pollution in different agricultural systems, both in the UK and overseas. He joined Bangor University in 2012, after working at the North Wyke Research Institute in Devon for 18 years.