Smith, L. G., Williams, A. G., & Pearce, Bruce. D. (2015). The energy efficiency of organic agriculture: A review. Renewable Agriculture and Food Systems, 30(03), 280–301. https://doi.org/10.1017/S1742170513000471
Laurence cites the work that I was involved in at Silsoe Research Institute (SRI) and the early days of Cranfield University. Looking at the environmental burdens of producing 10 food commodities in England and Wales. The paper cited looks at the main arable crops wheat, oilseed-rape, and potatoes . Read more about his project here Environmental Burdens of Agricultural and Horticultural Commodity Production – LCA (IS0205)
Smith, L. G., Williams, A. G., & Pearce, Bruce. D. (2015). The energy efficiency of organic agriculture: A review. Renewable Agriculture and Food Systems, 30(03), 280–301. https://doi.org/10.1017/S1742170513000471
Williams, A. G., Audsley, E., & Sandars, D. L. (2010). Environmental burdens of producing bread wheat, oilseed rape and potatoes in England and Wales using simulation and system modelling. International Journal of Life Cycle Assessment, 15(8), 855–868. Scopus. https://doi.org/10.1007/s11367-010-0212-3