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.

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:

• Yusra Zireeni (Funded by ITN FertiCycle, with Davey Jones).The role of sulphur in nutrient supply from processed slurry and digestates.

• Emma Withers (Funded by ENVISION, with Davey Jones, Dr Laura Cardenas and Alistair Manning). Extreme weather events exacerbate nitrous oxide emissions from soil (Extreme-N₂O).

• 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.

• Ma Yan (Funded by Bangor-China Scholarship Council Scheme, Bangor University, with Prof Davey Jones, Dr Laura Cardenas and Dr Tony Hooper, 2020 completed). The use of biological nitrification inhibitors to affect N cycling and losses from agricultural soils.

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.

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