J. A. McGee is a Ph.D. student in sociology with a concentration in environmental sociology at University of Oregon. His research explores the development and environmental impacts of sustainable markets. He recently posted an intriguing study at https://www.academia.edu/. It concludes that the increase in certified organic farmland from 2000 to 2008 “is not correlated with declines in greenhouse gas emissions derived specifically from agricultural production and, on the contrary, is associated positively overall with agricultural greenhouse gas emissions.”
The crops with greater fuel conumption are grain, vegetables, fruit, broilers, egg layers, and pork.