Does that chart separate out the transportation that's involved in agriculture, though? It has transportation at nearly 30%. If the answer to my question is "yes", then the question is how much of the transportation slice is part of the agricultural process (transportation of raw materials, to processing facilities, to packaging facilities, to grocery stores, etc).

And a further question, regardless of the answer to the above question, is: how much does this change depending on the type of agriculture? For example, I would imagine the supply chain for beef would have much more transportation involved than that for beans or soy (think of all the steps that go into making animal feed alone, and that is step 0).