David is a soil chemist and physicist who specialises in the processes responsible for generating the contaminants from agricultural production and processing that adversely affect downstream water resources. David’s work has included the development of a contaminant tracing technology based on organic markers and applying the analytical chemistry and mathematical techniques, commonly termed “metabolomics”, to investigating the processes responsible for phosphorus and nitrogen exports from agricultural systems, and potential mitigation measures. David has been at the forefront of incorporating these learnings into risk-based decision support tools (both quantitative and qualitative) using Bayesian Networks. David has published over sixty refereed journal publications, four book chapters and has received several awards for his work and associated, down-to-earth presentations. David is currently an honorary Senior Fellow in the School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences at the University of Melbourne, and the Principal of Soil and Allied Services Pty. Ltd. This page provides access for students to some of the written resources David has produced during his career.