It was not me who said that, I just replied to it.There are many things that "are said". Most of them are false.
"Primary energy inputs"? I haven't seen any tractors or trucks running on coal or NG. Yes, fertilizer may be made by NG and it is used for drying the corn. I'm really dubious that much coal is used since coal isn't readily available in most of the corn belt.
i don't think there is "land sitting idle from not growing tobacco".
#1 - under the old system, tobacco was mostly grown on small plots, quarter to one acre plots, usually on ground not suitable for growing anything other than pasture.
#2 - under the new system (which is still strong), tobacco is being grown in larger fields.
We have rail road in these parts of country, mostly coal riding its rails.